Tesi sul tema "Sequence stratigraphy"
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1
Nakanishi, Takeshi. "Practical application of sequence stratigraphy and risk analysis for stratigraphic trap exploration". Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phn1635.pdf.
Testo completoAbstract (sommario):
"September 2002" Includes bibliographical references (leaves 200-209) Outlines an evaluation procedure for stratigraphic trap exploration by employing sequence stratigraphy, 3D seismic data visualisation and quantitative risk analysis with case studies in an actual exploration basin.
2
Kahmann-Robinson, Julia A. Atchley Stacy C. "The sequence stratigraphic evolution of the Sturgeon Lake bank, central Alberta, Canada and its regional implications". Waco, Tex. : Baylor University, 2005. http://hdl.handle.net/2104/3016.
Testo completo
3
Nunes, Caio Oliveira. "Tectonic and stratigraphic evolution of southern Jacuípe basin based on seismic sequence stratigraphy". IGEO, 2018. http://repositorio.ufba.br/ri/handle/ri/26188.
Testo completoAbstract (sommario):
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A Bacia de Jacuípe é considerada uma bacia de nova fronteira localizada no Nordeste Brasileiro, na margem passiva leste, e estritamente offshore. Acredita-se que ela tenha um grande potencial para jazidas de hidrocarbonetos. Entretanto, há uma grande carência em estudos integrados que auxiliem no seu entendimento. O presente trabalho visa compreender a história evolutiva da bacia através da interpretação de sequências de segunda e terceira ordens em dados de sísmica de reflexão. A partir da interpretação de 40 perfis sísmicos 2D e do único poço perfurado, que encontra-se na região de plataforma, os autores puderam caracterizar importantes eventos dentro da bacia. Dentro da supersequência rifte foram reconhecidas quatro sequências deposicionais nomeadas Rift 1, Rift 2, Rift 3 e Rift 4, limitadas por três limites de sequência. Os riftes 1 e 2 têm deposições isoladas ao longo da bacia e as falhas sintéticas e antitéticas destas fases começam um processo de conexão. O Rift 3 tem a maior representatividade na bacia e seus depósitos cobrem a maior parte dela. O Rift 4 representa o fim da subsidência mecânica com menores expressões nos falhamentos e experimentou um soerguimento, o qual levou a atual plataforma continental a ficar exposta durante eventos subsequentes. A supersequência Drift foi subdividida em dois estágios drifte. Uma vez que a bacia sofreu um soerguimento ao final do seu rifteamento, o primeiro estágio do drifte tem o preenchimento sedimentar confinado ao talude e ao sopé continental. Enquanto que no segundo estágio do drifte a sedimentação ultrapassa a falha de borda e seus depósitos se sobrepõem à supersequência rifte na plataforma. Um mapa estrutural de falhas foi construído para a porção sul da Bacia de Jacuípe destacando os principais controles do falhamento, a linha de charneira da bacia, principais depocentros, o Alto Externo de Jacuípe e um alto vulcânico. O limite geográfico a sul com a Bacia de Camamu foi definido em uma zona complexa de falhas de transferência e de alívio, caracterizando assim, um limite geológico. Adaptações foram sugeridas para uma nova carta cronoestratigráfica para a porção sul da Bacia de Jacuípe.
ABSTRACT Jacuípe Basin is considered a new frontier basin in the northeastern Brazilian passive margin. It is believed it has a great potential for hydrocarbon plays and leads. However, it lacks in integrated studies for its understanding. The present paper aims to comprehend the evolutionary history of such basin through seismic reflection analysis of second and third orders sequences. With the interpretation of several 2-D seismic profiles and a well drilled on the platform the authors were able to distinguish important events within the basin. Within the rift supersequence it was recognized four sequences named as Rift 1, Rift 2, Rift 3 and Rift 4, limited by three sequence boundaries. Rifts 1 and 2 have scattered depositions and the synthetic and antithetic faults start a linkage process. Rift 3 has a wide spread representation throughout the basin covering most part of it. Rift 4 makes up the termination of mechanical subsidence with minor expression in faulting and has experienced an uplift whose led the currently continental shelf to be exposed most part of subsequent events. Drift supersequence was split in two drifting stages. Inasmuch as basin has undergone an uplift, the first drift stage has sedimentation confined to slope and rise regions. Whereas in the second drift stage sedimentation surpasses the border fault and its successions overlie directly rift supersequence in platform. A structural faulting map was built for southern Jacuípe Basin depicting main faulting controls and trends, basin hinge line, main depocenters, the Jacuípe External High and a volcanic plug. The geographic southern boundary with Camamu Basin was set up at a complex zone of transfer and release faults, making up a geologic limit. Adaptations were suggested for a new chronostratigraphic chart for southern Jacuípe Basin.
4
Shelton, Jessica Anne. "Application of sequence stratigraphy to the nonmarine Upper Cretaceous Two Medicine Formation, Willow Creek anticline, northwestern, Montana". Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/shelton/SheltonJ0507.pdf.
Testo completo
5
Suchy, Daniel R. "Hudson Bay platform : silurian sequence stratigraphy and paleoenvironments". Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70280.
Testo completoAbstract (sommario):
Trends in relative sea-level change, shown by curves drawn from drill core and outcrop sections in Llandoverian carbonates of the Hudson Bay Platform, were used to correlate individual parasequences among widely separated localities. Two sequences, bounded by regional disconformities, include: (1) the Severn River Formation, and (2) the Ekwan River, Attawapiskat, and Kenogami River Formations. Initial onlap of marine facies at the base of the Severn River Formation progressed from north to south, occurring first in the Hudson Bay Basin, then in the Moose River Basin; final retreat of the seas at the end of Attawapiskat time was in the opposite direction. The most extensive inundations occurred during Ekwan River and Attawapiskat depositional times. Large-scale trends in the curves delineate four major Early Silurian sea-level highstands also recognized in other basins.Reefs in outcrops along the Attawapiskat River represent one interval of reef growth, had a syndepositional relief of 8-10 meters, and were terminated by a relative sea-level fall. Their present distribution is controlled by variously uplifted fault blocks.
The most important diagenetic processes were early marine cementation and shallow burial diagenesis, and in the southwestern Moose River Basin early secondary dolomitization.
6
Al, Kharusi Laiyyan Mohammed. "Correlation between High Resolution Sequence Stratigraphy and Mechanical Stratigraphy for Enhanced Fracture Characteristic Prediction". Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_dissertations/339.
Testo completoAbstract (sommario):
Sequence stratigraphy relates changes in vertical and lateral facies distribution to relative changes in sea level. These relative changes in carbonates effect early diagenesis, types of pores, cementation and dissolution patterns. As a result, in carbonates, relative changes in sea level significantly impact the lithology, porosity, diagenesis, bed and bounding surfaces which are all factors that control fracture patterns. This study explores these relationships by integrating stratigraphy with fracture analysis and petrophysical properties. A special focus is given to the relationship between mechanical boundaries and sequence stratigraphic boundaries in three different settings: 1) Mississippian strata in Sheep Mountain Anticline, Wyoming, 2) Mississippian limestones in St. Louis, Missouri, and 3) Pennsylvanian limestones intermixed with clastics in the Paradox Basin, Utah. The analysis of these sections demonstrate that a fracture hierarchy exists in relation to the sequence stratigraphic hierarchy. The majority of fractures (80%) terminate at genetic unit boundaries or the internal flooding surface that separates the transgressive from regressive hemicycle. Fractures (20%) that do not terminate at genetic unit boundaries or their internal flooding surface terminate at lower order sequence stratigraphic boundaries or their internal flooding surfaces. Secondly, the fracture spacing relates well to bed thickness in mechanical units no greater than 0.5m in thickness but with increasing bed thickness a scatter from the linear trend is observed. In the Paradox Basin the influence of strain on fracture density is illustrated by two sections measured in different strain regimes. The folded strata at Raplee Anticline has higher fracture densities than the flat-lying beds at the Honaker Trail. Cemented low porosity rocks in the Paradox Basin do not show a correlation between fracture pattern and porosity. However velocity and rock stiffness moduli's display a slight correlation to fracture spacing. Furthermore, bed thickness is found to be only one factor in determining fracture density but with increasing strain, internal bedforms and rock petrophysical heterogeneities influence fracture density patterns. This study illustrates how integrating sedimentologic and sequence stratigraphic interpretations with data on structural kinematics can lead to refined predictive understanding of fracture attributes.
7
Stubbs, Dreadnaught G. "A Sequence Stratigraphic Analysis of the Allegheny Group (Middle Pennsylvanian),Southeast Ohio". Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1524600396756809.
Testo completo
8
Demirel, Seda. "Foraminiferal Paleontology And Sequence Stratigraphy In The Upper Visean". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614831/index.pdf.
Testo completoAbstract (sommario):
The aim of this study is to investigate the Upper Visean substages, delineate the Visean - Serpukhovian boundary with calcareous foraminifera and interpret the foraminiferal evolution and sequence stratigraphical framework by using sedimentary cyclicity across the boundary section. For this purpose a 59,61 m thick stratigraphic section consisting of mainly limestone and partly sandstone and shale is measured in the Aziziye Gedigi and Oruçoglu Formations in the Pinarbasi Region of Eastern Taurides. A detailed micropaleontological study has revealed presence of important foraminiferal groups namely, parathuramminids, earlandiids, endothyroids, archaediscids, biseriamminids, fusulinids, loeblichids, tournayellids and paleotextularids and 145 species and three biozones. The biozones are, in ascending order, Eostaffella ikensis &ndash
Vissarionovella tujmasensis Zone (Mikhailovsky
Late Visean), Endothyranopsis cf. sphaerica &ndash
Biseriella parva Zone (Venevsky
Late Visean) and Eostaffella pseudostruvei &ndash
Archaediscids @ tenuis stage Zone (Taurssk
Early Serpukhovian). A detailed microfacies analysis was carried out in order to understand the depositional history and sedimentary cyclicity and construct the sequence stratigraphic framework of the studied area. Three main depositional environments consisting of open marine, shoal or bank and tidal flat environments were interpreted based on the analysis of 12 major microfacies and 11 sub-microfacies types. Based on the vertical association of microfacies twenty-six cycles, two sequence boundaries and three sequences were recognized in the studied section and these two sequence boundaries, which correspond to the Mikhailovsky and Venevsky horizons, are the records of the global sea level changes during the Late Paleozoic Ice Age. Within this context Visean &ndash
Serpukhovian boundary falls in the transgressive system tract of the third sequence. The duration of cycles are calculated as 117 ky and interpreted as orbitally induced glacioeustatic cycles.
9
Owoyemi, Ajibola Olaoluwa. "Sequence stratigraphy of Niger Delta, Delta field, offshore Nigeria". Texas A&M University, 2004. http://hdl.handle.net/1969.1/2768.
Testo completoAbstract (sommario):
The Niger Delta clastic wedge formed along the West Africa passive margin. This wedge has been divided into three formations that reflect long-term progradation: 1) pro-delta shales of the Akata Formation (Paleocene to Recent), 2) deltaic and paralic facies of the Agbada Formation (Eocene to Recent) and 3) fluviatile facies of the Benin Formation (Oligocene-Recent). This study combines a three-dimensional seismic image with well log data from Delta field to describe lithic variations of the Agbada Formation and develop a sequence stratigraphic framework. The 5000-feet thick Agbada Formation in Delta field is divided by five major sequence boundaries, each observed in seismic cross sections to significantly truncate underlying strata. Sequence boundaries developed as mass flows eroded slopes steepened by the structural collapse of the Niger Delta clastic wedge. Basal deposits directly overlying areas of deepest incision along sequence boundaries formed by the migration of large, sinuous turbidite channels. Upward-coarsening sets of inclined beds, hundreds of feet thick, record progradation of deltas into turbidite-carved canyons and onto down faulted blocks. Thinner, more continuous seismic reflections higher within sequences are associated with blocky and upward-fining well-log patterns interpreted to reflect deposition in shoreline, paralic, and fluvial environments.
Episodes of structural collapse of the Niger Delta clastic wedge appear to be associated with progradation of Agbada Formation sediments and the loading of underlying Akata Formation shales. Progradation may have been more rapid during third order eustatic sea level falls. Effects of syn-sedimentary deformation on patterns of sediment transport and deposition are more pronounced in lower sequences within the Agbada Formation, and include: 1) incision into foot walls of listric normal faults, 2) abrupt reorientation of channelized flow pathways across faults, and 3) thinning of deposits across crests of rollover anticlines on down thrown fault blocks. Structural controls on deposition are less pronounced within younger sequences and canyon incisions along sequence boundaries are more pronounced, suggesting that the locus of sediment accumulation and structural collapse of the clastic wedge moved farther basinward as accommodation was filled in the area of Delta field.
10
Magbagbeola, Olusola Akintayo. "Sequence stratigraphy of Niger Delta, Robertkiri field, onshore Nigeria". Texas A&M University, 2005. http://hdl.handle.net/1969.1/4768.
Testo completoAbstract (sommario):
Deposits of Robertkiri field, in the central offshore area of Niger Delta, comprise a 4 km
thick succession of Pliocene to Miocene non-marine and shallow marine deposits. A
sequence stratigraphic framework for Robertkiri field strata was constructed by
combining data from 20 well logs and a seismic volume spanning 1400 km2. Major
sequences, hundreds of meters thick, define layers of reservoir and sealing strata formed
during episodic progradation and retrogradation of deltaic shorelines. These deposits
progress upward from fine-grained prodelta and deep water shales of the Akata
Formation through paralic sandstone-shale units of the Agbada Formation and finally to
sandy non-marine deposits of the Benin Formation. The Agbada Formation is divided
into six third-order sequences starting at the first seismic reflection that can be mapped
across the seismic volume. The Agbada Formation under Robertkiri field is complexly
deformed across a succession of major, cuspate, offshore-dipping, normal faults, and
associated antithetic faults and rollover anticlines within down-dropped blocks. Thickening of intervals between some reflections across major faults and away from the
crests of adjacent rollover anticlines suggest syndepositional displacement. Relationships
between major faults and the thickness of transparent seismic facies that comprise lower
parts of the seismic record suggest faulting was associated with movement of
undercompacted shales within the Akata and lower Agbada Formations.
Robertkiri field is located along the proximal margin of the Coastal Swamp I
depobelt, a subbasin within the Niger Delta clastic wedge formed by margin collapse
into underlying undercompacted shale. Accommodation and sequence development in
this setting is controlled by both structural faulting and sea level fluctuations. Upsection,
sequences become thinner, more laterally uniform in thickness, less structurally
deformed and contain less growth strata. Erosion along sequence boundaries becomes
progressively shallower and broader, as accommodation under Robertkiri field declined
and more sediment was bypassed basinward. Incisions along the base of older sequences
(>100 m) is greater than 3rd order sea level falls reported to occur during the Miocene,
which suggests that there were local areas of tectonic uplift within this dominantly
extensional setting.
11
Ardill, John. "Sequence stratigraphy of the Mesozoic Domeyko basin, northern Chile". Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307620.
Testo completoAbstract (sommario):
The Domeyko basin of northern Chile records Late Triassic-Early Cretaceous mixed carbonate and siliciclastic marine deposition along the western margin of Gondwana. The carbonate and siliciclastic ramp environment is characterised by the deposition of siliciclastic-dominated sediments at times of low accommodation space (lowstand and late highstand systems tracts) and carbonate-dominated sediments during periods of high accommodation space (transgressive and early highstand systems tracts). Along strike variations in siliciclastic sediment supply do not overprint the effects of basinwide changes of relative sea-level. Sequence stratigraphical analysis identifies five second-order sequences resulting from changes in accommodation space and hence, relative sea-level. Within these second-order cycles a higher-frequency cyclicity has also been identified. Each second-order sequence is composed of between 3 and 5 high-frequency sequences which results in a second-order composite sequence, but does not produce the "typical" sequence-sets normally associated with composite sequences. Comparison of the relative sea-level fluctuations interpreted from the Domeyko basin succession with those documented from other similar age South American marginal basins and northern hemisphere basins allows the distinction of regional from global events, and a methodology for potentially differentiating between eustatic and tectonic driving mechanisms. The choice of these basins permits an objective analysis of relative sea-level change using basins of different tectonic setting, on different continental plates. Relative sea-level fall in the late Early Sinemurian, earliest Pliensbachian, earliest Aalenian, Early Callovian, earliest Valanginian, and rises in the earliest Hettangian, earliest and Late Toarcian, Early and Late Bajocian, Late Bathonian and earliest Oxfordian of the Dorneyko basin appear time-equivalent to similar events in other southern and northern hemisphere basins and thus are interpreted to be products of eustatically driven, global sea-level cycles. Relative sea-level falls in the earliest Bathonian, Late Oxfordian, earliest Valanginian and rises in the Late Kimmeridgian are interpreted to be tectonically-driven, continental-scale changes in accommodation space. Although the earliest Valanginian relative sea-level fall can also be seen globally the sequence boundary is interpreted to be tectonically-enhanced by documented regional uplift in Chile and Argentina. The Domeyko basin succession appears to be dominantly controlled by global sea-level fluctuations during the Early-Middle Jurassic, interpreted to have been driven by glacio-eustasy, and by continental-scale fluctuations during the Middle Jurassic to mid-Cretaceous. Mesozoic back-arc basins of western South America record both eustatic and subduction-related relative sea-level fluctuations. To date, the latter have been assumed to be driven chiefly by Pacific plate spreading. However, five tectonically-driven sequence boundaries in the Domeyko and Neuquen basins which have no time correlative expressions in northern hemisphere basins display a close temporal association with five major Gondwanan fragmentation phases. They are: (A) the earliest Bathonian (170 Ma) sequence boundary was driven by the separation of Laurasia and Gondwana; (B) the Late Oxfordian (157 Ma) salinity crisis was driven by the separation of west from east Gondwana; (C) the termination of the marine Domeyko basin was driven by the fragmentation of east Gondwana; CD) the termination of the marine Neuquen Basin (114 Mal was driven by the opening of the South Atlantic; and (E) the major basin inversion associated with the Peruvian tectonic event (100 Mal was driven by the final fragmentation phase within east Gondwana. It is deduced that plate reorganisation associated with the initiation of new oceans during Gondwanan fragmentation resulted in increased coupling along the Andean subduction zone producing regional uplift and thus relative sea-level fall. Responses variously involve: basin barring and Kimmeridgian evaporite production; erosively-based fluvial sandstones directly overlying offshore marine deposits; closure of the Rocas Verdes oceanic marginal basin; sequential termination of marine conditions in the Domeyko and Neuquen back-arc basins; sudden influx of arc-derived alluvial conglomerates resulting from the onset of contractional tectonics; and an incremental jump in the eastward propagation of the Andean volcanic arc. Discrete contractional episodes in the otherwise extensional Andean active margin were thus driven by the incremental spreading phases of the supercontinent. Associated thermal signatures are recorded near the centre of Gondwana by kimberlite emplacement frequency maxima in southern Africa. Plate tectonic theory emphasises the dynamic interaction between adjacent plates, whereby relative rates of motion can be fixed to either the underriding or overriding plate as a reference frame. With reference to the circum-Gondwana subduction zone, I believe that in the past an overemphasis has been placed on the motions of oceanic plates in the Pacific region, while overlooking the role that the thermal evolution of the Pangean supercontinent played in driving circum-Pangean subduction. Thus, careful sequence stratigraphical analysis of active margin sedimentary basins provides a high resolution record, presently under-utilised in detecting, identifying and analysing global tectonic events in time.
12
Salem, Yahya Ahmed Ali. "Sequence stratigraphy of the Palaeozoic Ghadamis Basin NW Libya". Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420859.
Testo completo
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Udgata, Devi Bhagabati Prasad. "Glauconite as an indicator of sequence stratigraphic packages in a Lower Paleocene passive-margin shelf succession, Central Alabama". Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/UDGATA_DEVI_55.pdf.
Testo completo
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Shoore, David Joseph. "Sequence stratigraphy of the Bridal Veil Falls Limestone, carboniferous, Oquirrh Group, on Cascade Mountain, Utah : a standard Morrowan cyclostratigraphy for the Oquirrh basin /". Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd775.pdf.
Testo completo
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Robinson, Eric D. "Facies architecture of the Upper Sego member of the Mancos Shale Formation, Book Cliffs, Utah". Texas A&M University, 2005. http://hdl.handle.net/1969.1/3270.
Testo completoAbstract (sommario):
The Late Cretaceous upper Sego Member of the Mancos Shale exposed in the Book
Cliffs of east-central Utah is a 30 m thick sandstone wedge that overlies the Anchor
Mine Tongue of the Mancos Shale and underlies coastal plain deposits of the Neslen
Formation. Although this sandstone has been interpreted to be comprised of
transgressive valley fills, recent detailed facies architecture studies of the underlying
lower Sego Sandstone suggest these deposits may instead be regressive deposits of tideinfluenced
deltas. This study maps facies associations, the geometry of lithic bodies, and
key stratigraphic surfaces in order to define the architecture of a 12 km long cross
section of the upper Sego Sandstone. This broadly depositional dip-oriented cross
section exposes a vertical stack of three sandy intervals, truncated by a high-relief
erosion surface, and capped by a shell rich lag. Sandy intervals are interpreted be an
assemblage of forward stepping successions of tide-influenced delta lobes. Interval 1,
dominantly highly marine bioturbated sandstones which thin landward over kilometers,
is cut locally by an erosion surface overlain by tidal bed sets. It is capped by a localized
transgressive shell lag and then a thin continuous marine shale. Intervals 2 and 3 are composed of stacked tidal bar deposits that successively coarsen upward and thicken
basinward. Interval 2 is overlain by thin marine shales, whereas interval 3 is capped by a
pronounced oyster shell lag ravinement surface. A high-relief erosion surface that
extends from the top of the upper Sego sandstone down into the Anchor Mine Tongue
Shale, is overlain by coarser-grained amalgamated fluvial channel deposits and is
interpreted to be a incised valley fill. Erosion surfaces at the base of sandy intervals,
thicken and decrease in marine bioturbation within successive intervals, and the valley
cut into this succession reflects episodic forced regression of a deltaic shoreline.
16
Badescu, Adrian Constantin. "Reservoir characterization of the Miocene Starfak and Tiger Shoal fields, offshore Louisiana through integration of sequence stratigraphy, 3-D seismic, and well-log data". Access restricted to users with UT Austin EID, 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3108452.
Testo completo
17
Bowman, Andrew Philip. "Sequence stratigraphy and reservoir characterisation in the Columbus Basin, Trinidad". Thesis, Imperial College London, 2004. http://hdl.handle.net/10044/1/7990.
Testo completo
18
Parkinson, D. Neil. "The sequence stratigraphy of the Lower Jurassic of Western Europe". Thesis, University of Oxford, 1994. http://ora.ox.ac.uk/objects/uuid:cddbc521-f687-41dd-a9ad-f70621012555.
Testo completoAbstract (sommario):
The Lower Jurassic stratigraphy of seven contrasting areas in western Europe is compared in order to seek evidence for a pan-Western European stratigraphic forcing mechanism. Sequencestratigraphic models are discussed and emphasis is placed upon the differing response of sedimentary systems in "accommodation space-dominated" and "supply-dominated" settings. Spectral gamma-ray data from clastic successions in the Wessex and Cleveland basins (England) are used to elucidate vertical trends. A proximal-distal model for control of Th/K ratios is advanced. Stage-frequency regressive-transgressive cycles in the two areas are shown to be closely correlative. Sedimentolgical logs and spectral gamma-ray data are presented for the carbonate ramp into turbidite sequence of Peniche (Portugal) and for a new exposure of the Pliensbachian-Toarcian in southern Germany. Systematic variation in clay mineralogy across Europe is suggested. Cycles in the Lower Jurassic of the North Viking Graben (Norwegian North Sea) are examined using wireline log correlation and the stratigraphic evolution of the Tethyan Rift in the Western and Southern Alps is reviewed. X-ray diffraction studies of the Pliensbachian-Toarcian interval in the Southern Alps are presented in order to elucidate sediment supply to the pelagic realm. The cycles observed in the English sections appear to be manifest widely across western Europe in a variety of tectonic and sedimentary settings. Sharp basinward facies shifts (candidate sequence boundaries) do not appear to be synchronous between basins. 87SR/86SR analysis of belemnites from the Portuguese and German sections confirms the regional applicability of the results of Jones (1992) and the utility of this technique in long range correlation. Carbon and oxygen analysis of the same material supplements the data of other workers and a direct relationship is suggested between relative sea level and organic carbon burial in the Early Jurassic.
19
Ahmadi, Ziad M. "Sequence stratigraphy using wireline logs from Upper Jurassic of England". Thesis, Durham University, 1997. http://etheses.dur.ac.uk/1644/.
Testo completo
20
Smith, Tyson Bartek Louis Robert. "Sequence stratigraphy and stratigraphic architecture of the upper Mississippian lower Hinton Formation Appalachian Basin, West Virginia, USA /". Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2009. http://dc.lib.unc.edu/u?/etd,2651.
Testo completoAbstract (sommario):
Thesis (M.S.)--University of North Carolina at Chapel Hill, 2009.Title from electronic title page (viewed Oct. 5, 2009). "... in partial fulfillment of requirements for the degree of Master's of Geological Sciences in the Department of Geological Sciences." Discipline: Geology; Department/School: Geological Sciences.
21
Cleveland, David M. Atchley Stacy C. Nordt Lee C. "Fluvial sequence stratigraphy and paleoclimate of the Upper Triassic (Norian-Rhaetian) Chinle Strata, northern New Mexico". Waco, Tex. : Baylor University, 2007. http://hdl.handle.net/2104/5118.
Testo completoAbstract (sommario):
Thesis (Ph.D.)--Baylor University, 2007.In the abstract "[delta]13C" the "13" and "[delta]18O" the "18" are superscript; "pCO2" the "2" is subscript. Includes bibliographical references (p. 107-118).
22
Eifert, Tambra L. "The Cretaceous-Paleogene transition in the northern Mississippi Embayment, S.E. Missouri: palynology, micropaleontology, and evidence of a mega-tsunami deposit". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Eifert_09007dcc80658622.pdf.
Testo completoAbstract (sommario):
Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 4, 2009) Includes bibliographical references (p. 243-265).
23
McLaughlin, Patrick I. "Cratonic sequence stratigraphy advances from analysis of mixed carbonate-siliciclastic successions /". Cincinnati, Ohio : University of Cincinnati, 2006. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1147959013.
Testo completoAbstract (sommario):
Thesis (Ph. D.)--University of Cincinnati, 2006.Title from electronic thesis title page (viewed Aug. 3, 2006). Includes abstract. Keywords: faunal gradient analysis, taphonomy, hardground, condensed bed, cyclothem, Lexington Limestone, Paleozoic, forced regression. Includes bibliographical references.
24
Hall, Matthew Thomas. "Sequence stratigraphy and early diagenesis : the Sobrarbe Formation, Ainsa Basin, Spain". Thesis, University of Manchester, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516716.
Testo completo
25
Oliver, Guy Mark. "High-resolution sequence stratigraphy and diagenesis of mixed carbonate/siliciclastic successions". Thesis, University of Plymouth, 1997. http://hdl.handle.net/10026.1/2019.
Testo completoAbstract (sommario):
The aims of this thesis are to evaluate whether the distribution of diagenetic features in nearshore successions can be explained within a sequence stratigraphic concept; to assess whether the identification and analysis of these features can be used to aid in making sequence stratigraphic interpretations; and to evaluate whether sequence stratigraphy can be used to predict the distribution of diagenetic heterogeneities at the field and inter-well scale. High resolution sequence stratigraphic frameworks have been established for two nearshore mixed carbonate/siliciclastic successions, using facies and early diagenetic analyses. These are the Upper Jurassic Corallian Group of south Dorset and the Lower Cretaceous lower to middle Ericeira Group of west central Portugal. Early diagenetic analyses (including petrographic, CL, XRD and stable isotope work), was performed on 143 samples extracted from concretions and cemented beds at key horizons within these two successions. The early diagenetic results from within the majority of these cemented bodies generally supports the proposed facies-based sequence stratigraphic interpretation of parasequences, systems tracts and sequences. At a parasequence scale, early diagenetic analyses indicate that concretionary growth is controlled by an initial phase of rapid burial, equating to the period of parasequence progradation, followed by a period of prolonged residence time within a single diagenetic zone. This equates to a period of non-deposition/marine flooding at a parasequence boundary. The results also indicate that the application of sequence stratigraphic theory can be used to predict the presence and location of early diagenetic concretions within similar successions. Analysis of early diagenetic features within carbonate cemented beds (such as marine hard-ground surfaces) also supports the facies-based identification of parasequences. Such features are closely associated with parasequence boundary formation and the available data indicates that it is possible to predict their distribution within systems tracts of similar successions. At t?e systems tract scale, analysis of upward increasing or decreasing trends in the volume of pore-mling authigenic phases relates to subtle changes in the rate of sedimentation versus the rate of accommodation creation. A general upward increase in the volume of early diagenetic products (particularly dolomite) is seen to Occur within highstand systems tracts, which is attributed to an increase in residence time within early diagenetic zones as the rate of progradation/burial increases and the rate of non-deposition/marine flooding at parasquence boundaries remains constant. Similarly, an upward increase in the a180 isotope values of carbonate cements (to a more marine value) occurs within shelf-margin or lowstand systems tracts where rates of ~e1ative sea-level are rising increasingly quickly and, a dominance of marine cements occurs within coarser gramed beds of transgressive systems tracts. At the sequence scale, early diagenesis is controlled by the degree of relative sea-level fall and subsequent subaerial exposure at the end of the highstand systems tract. If a sequence is bounded above by a type-t sequence boundary and there is evidence of a period of sub-aerial exposure then the effects of surface related diagenesis (dissolution, replacement and further cementation) can be identified. However. if a sequence is bounded above by a type-2 sequence boundary, the effects of any meteoric diagenesis are likely to be confined to in-extensive fresh-water lenses originating from an up-dip/sub-aerially exposed area of the basin. Consequently, primary early diagenetic cements contained within pore spaces of the existing systems tracts will be preserved. The approach taken in this research has demonstrated that early diagenesis is a useful tool in refining high resolution sequence stratigraphic interpretations and in the prediction of the distribution of early diagenetic heterogeneities within reservoir units. It also shows that for nearshore successions the distribution of diagenetic heterogeneities can be predicted at a range of scales.
26
McLAUGHLIN, PATRICK I. "CRATONIC SEQUENCE STRATIGRAPHY: ADVANCES FROM ANALYSIS OF MIXED CARBONATE-SILICICLASTIC SUCCESSIONS". University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147959013.
Testo completo
27
Pierson, Jessica A. "Late cretaceous (Campanian and Maastrichtian) sequence stratigraphy, southeastern North Carolina, USA /". Electronic version (PDF), 2003. http://dl.uncw.edu/etd/2003/piersonj/jessicapierson.pdf.
Testo completo
28
Maxwell, Gregor. "The sedimentology and sequence stratigraphy of the Middle Jurassic Beryl Formation, Quad 9, U.K.C.S". Thesis, University of Aberdeen, 1999. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=236949.
Testo completoAbstract (sommario):
Quad 9 of the U.K.C.S., North Sea is located 215 miles NE of Aberdeen. It contains four producing fields with over 400 mmbbls of oil and NGL's and 5.1 TCF of gas initially in place. The major reservoir unit is the Middle Jurassic (Bajocian to Bathonian) Beryl Formation, a marginal to shallow marine deposit which varies in thickness from 150' to 1100' across the studied area. It was deposited within the Beryl Embayment, a transfer zone between two actively extending basin bounding faults of the South Viking Graben, prior to the onset of the major rifting phase during the Callovian to Ryazanian. The objectives of the thesis were to provide a revised sedimentological model for the area accounting for the contrasting sedimentary styles present within the Beryl Formation and to unify the different correlation schemes used by the different operating companies in the area. It was based on well data from 58 cored and a further 79 uncored sections spreading nine licence blocks within Quad 9. Reservoir engineering, biostratigraphic and structural data has also been used for a fully integrated study. Initial core logging identified 32 facies and 10 trace fossil assemblages which were subsequently integrated into 14 facies associations. These were then extrapolated further into the uncored sections by wireline facies associations. Correlation was initially driven by comparison of cored sections but finalised by an integration of the reservoir engineering and biostratigraphic data. Outcrop work on the Middle Jurassic of Skye and Companian of eastern Utah provided an analogue study to accompany the downhole data. Quad 9 can be split up into three main areas distinguished by different stratigraphic histories, the southern area consisting of the Buckland and Sorby Fields, the central area consisting of the Beryl, Nevis, Ness and Linnhe Fields and a northern area consisting the Bruce and Keith Fields.
29
Kells, Melanie P. "Sequence stratigraphy and depositional history of the Artinskian to Kungurian sequence, Otto Fiord area, northwestern Ellesmere Island". Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/10139.
Testo completoAbstract (sommario):
The Artinskian to Kungurian Sequence of the Otto Fiord area is dominated by the Great Bear Cape, Raanes and Trappers Cove formations in addition to the upper portions of the Nansen and Hare Fiord formations. The Great Bear Cape Formation (10-300 m), in the Otto Fiord area, is a yellowish-weathering, cliff-forming, packstone to grainstone dominated by echinoderms, bryozoans, and brachiopods. The Raanes Formation (10-225 m) is greenish-weathering, recessive to resistant, shaly to silty, variably cherty wackestone to packstone dominated by bryozoans, brachiopods, crinoids, and sponge spicules in addition to resistant, massive, very fine-grained, bryozoan-lime mud wackestone forming bioherms. The Trappers Cove Formation (55-1000 m) is black to dark gray spiculitic chert that is interfingered with thinly-bedded, black, recessive shales and siltstones. (Abstract shortened by UMI.)
30
Gollop, Alison. "Structural controls on the seismic sequence stratigraphy of the Ben Nevis, Avalon, and Eastern Shoals formations, Terra Nova field, Jeanne D'Arc Basin, offshore Newfoundland /". Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,76559.
Testo completo
31
Isnard, Hélène. "Application des traceurs isotopiques Pb-Pb, Sm-Nd et Lu-Hf à la compréhension de l'histoire archéenne du bouclier canadien et à la formation de la croûte continentale /". Thèse, Chicoutimi : Montréal : Université du Québec à Chicoutimi ;. Université du Québec à Montréal, 2003. http://theses.uqac.ca.
Testo completoAbstract (sommario):
Thèse (D.R.Min.) -- Université du Québec à Chicoutimi, programme extensionné à l'Université du Québec à Montréal, 2003.Bibliogr.: f. 203-204. Document électronique également accessible en format PDF. CaQCU
32
BARTHOLOMEW, ALEXANDER. "CORRELATION OF HIGH ORDER CYCLES IN THE MARINE-PARALIC TRANSITION OF THE UPPER MIDDLE DEVONIAN (GIVETIAN) MOSCOW FORMATION, EASTERN NEW YORK STATE". University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1022593337.
Testo completo
33
Cavas, Matthew P. "THE QUATERNARY GEOLOGY AND SEQUENCE STRATIGRAPHY OF THE LAKE BONNEVILLE DEPOSITS IN THE MATLIN QUADRANGLE, BOX ELDER COUNTY, NORTHWESTERN UTAH". Ohio University / OhioLINK, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1080586528.
Testo completo
34
Campo, Bruno <1984>. "The Pleistocene-Holocene Transition in the Po Plain (Italy): Stratigraphic Architecture and Sequence Stratigraphy from a Highly-Subsiding Basin". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7540/1/Tesi_dottorato_XXVIII_ciclo_Bruno_Campo_Esame_Finale_2016.pdf.
Testo completoAbstract (sommario):
This work focuses on the Late Pleistocene-Holocene transition in the southern Po Basin. Five areas were investigated, with the aim of unraveling the role of different allogenic factors (climate, eustacy, sediment supply) on stratigraphic architecture in the last 45 ky. The study starts from the distal portion of the basin (the coastal plain deposits) and then moves towards increasingly internal areas: the alluvial sector characterized by the Po channel belt deposits, and the mud-prone interfluvial succession between the Apenninic margin and the Po channel belt. In the coastal sector, high-resolution facies analysis, along with a well-constrained chronostratigraphic framework, led to the accurate paleoenvironmental reconstruction of the last 45 ky BP depositional history along the 93 km-long transect. It is also provided a sequence stratigraphic interpretation for the whole sedimentary succession. In the Po channel belt sector, based on 28 radiocarbon dates, facies interpretation from high-quality core descriptions and freshly-drilled continuous cores, the contrasting stratigraphic architecture of Late Pleistocene and Holocene deposits was highlighted. Changes in lithofacies and channel stacking patterns reveal the vertical superposition of amalgamated fluvial-channel sands (Late Pleistocene) and mud-dominated deposits (Holocene), with isolated fluvial-channel bodies. We also attempted to establish the link between facies architecture, sea-level fluctuations and climate changes. The 3rd study area (interfuvial succession) was selected to test a new method for paleosol identification, on the basis of geotechnical properties generated from pocket penetrometer values.
Through the reconstruction of the Biferno coastal deposits (4th study area, located ca. 300 km south of the Po Plain) we had the opportunity to document two coeval (Late Pleistocene - Holocene) coastal sedimentary successions, diverging in terms of shelf gradient and proximity to the LGM-lowstand Po Delta. The 5th study area, broadly coincides with Ferrara, was selected to show how high-resolution stratigraphic studies can be used for aquifer protection.
35
Campo, Bruno <1984>. "The Pleistocene-Holocene Transition in the Po Plain (Italy): Stratigraphic Architecture and Sequence Stratigraphy from a Highly-Subsiding Basin". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7540/.
Testo completoAbstract (sommario):
This work focuses on the Late Pleistocene-Holocene transition in the southern Po Basin. Five areas were investigated, with the aim of unraveling the role of different allogenic factors (climate, eustacy, sediment supply) on stratigraphic architecture in the last 45 ky. The study starts from the distal portion of the basin (the coastal plain deposits) and then moves towards increasingly internal areas: the alluvial sector characterized by the Po channel belt deposits, and the mud-prone interfluvial succession between the Apenninic margin and the Po channel belt. In the coastal sector, high-resolution facies analysis, along with a well-constrained chronostratigraphic framework, led to the accurate paleoenvironmental reconstruction of the last 45 ky BP depositional history along the 93 km-long transect. It is also provided a sequence stratigraphic interpretation for the whole sedimentary succession. In the Po channel belt sector, based on 28 radiocarbon dates, facies interpretation from high-quality core descriptions and freshly-drilled continuous cores, the contrasting stratigraphic architecture of Late Pleistocene and Holocene deposits was highlighted. Changes in lithofacies and channel stacking patterns reveal the vertical superposition of amalgamated fluvial-channel sands (Late Pleistocene) and mud-dominated deposits (Holocene), with isolated fluvial-channel bodies. We also attempted to establish the link between facies architecture, sea-level fluctuations and climate changes. The 3rd study area (interfuvial succession) was selected to test a new method for paleosol identification, on the basis of geotechnical properties generated from pocket penetrometer values.
Through the reconstruction of the Biferno coastal deposits (4th study area, located ca. 300 km south of the Po Plain) we had the opportunity to document two coeval (Late Pleistocene - Holocene) coastal sedimentary successions, diverging in terms of shelf gradient and proximity to the LGM-lowstand Po Delta. The 5th study area, broadly coincides with Ferrara, was selected to show how high-resolution stratigraphic studies can be used for aquifer protection.
36
Al-Mojel, Abdullah. "Sedimentology and sequence stratigraphy of the Jurassic, Jabal Tuwaiq, Central Saudi Arabia". Thesis, Bordeaux 3, 2017. http://www.theses.fr/2017BOR30037/document.
Testo completoAbstract (sommario):
Cette étude porte sur l’analyse des séries jurassiques du Shaqra Group (Toarcian to Kimmeridgian) qui affleurent de manière continue en Arabie centrale le long d’un transect de plus de 1000 km de long. Ces séries se sont accumulées sur une vaste plate-forme épicontinentale peu profonde, en contexte tropical. Ces affleurements permettent ainsi d’observer la partie occidentale des séries renfermant des systèmes pétroliers prolifiques exploités en subsurface en Arabie Saoudite. L’analyse sédimentologique de nombreuses coupes et la réalisation de corrélations stratigraphiques de haute résolution sur un transect de 600 km au sud de Riyad, complété par des corrélations avec les données de forage plus à l’est (entre Riyadh et le Rimthan Arch), permettent de distinguer une organisation séquentielle à différents ordres de fréquence et de reconstituer l’évolution de la plate-forme au sein de ces séquences. La plate-forme jurassique évolue d’une plate-forme horizontale caractérisée par des systèmes mixtes à la transition continental-marin du Toarcien au Callovien moyen (formations Marrat et Dhruma) vers un système de type rampe - bassin intrashelf du Callovien au Kimméridgien inférieur (formations Tuwaiq et Hanifa) pour finir par une plate-forme aggradante carbonatée et silico-clastique (Fm. Jubaila) puis carbonatée et évaporitique en contexte aride (Fm. Arab) au Kimméridgien. Les cycles tectono-stratigraphiques de 2ème ordre du Jurassique inférieur et moyen sont limités à la base et au sommet par des discontinuités régionales. Ils occupent un dépôt-centre stationnaire et décrivent un onlap côtier de grande ampleur avec un maximum transgressif au Callovien moyen (Upper Tuwaiq Mb.). Durant le Jurassique supérieur, les dépôts de rampe carbonatée de la Formation Hanifa passent progressivement vers l’ouest à des dépôts plus profonds de bassin intrashelf relativement riches en matière organique (Khurais - Rimthan Arch). La séquence Jubaila – Arab-D montre des variations d’épaisseur qui indiquent une déformation de grande longueur d’onde de la plate-forme arabe à cette période. Les faciès récifaux du membre Arab D sont interprétés comme représentant le maximum d’inondation de ce cycle qui se termine par le développement de systèmes carbonatés – évaporitiques à la fin du JurassiqueThey serve as westernmost reference for adjacent prolific reservoirs and source-rock bearing intrashelf basins. Several hierarchical sequences (second to fourth order) have been recognized in outcrops sections (600 km long south of Riyadh) and correlated with gamma-ray logs of subsurface wells (550 km long from Riyadh to Rimthan Arch). The Jurassic platform evolved from very-flat continental-to-nearshore mixed carbonate-siliciclastic platform (Marrat-Dhruma; Toarcian to Middle Callovian) to differentiated ramp with deep intrashelf basins (Tuwaiq-Hanifa; Callovian to Early Kimmeridgian) to a lowstand followed by flat aggraded platform (Jubaila-Arab-D; Kimmeridgian). Tectonic related siliciclastic influx took place in arid condition during the Kimmeridgian (Jubaila Fm.). The Jurassic platform ends with the mixed carbonate-evaporite systems of the Arab Fm. A first second-order tectono-eustatic cycle (Marrat to Tuwaiq) is bounded at the base and top by regional unconformities. It has a stationary depocenter, and show long-term coastal onlap and marine transgression that reached its maximum extent during the upper Tuwaiq (Middle Callovian). The Hanifa Fm. consists of four 3rd-order sequences aggraded flat-toped platform (outcrops to Khurais) marked at the base by argillaceous limestone and top by pure high-energy carbonates with localized reef buildups. The Jubaila Arab-D is two 3rd-order sequences begin with low-stand deposits followed by long-term transgression. These formed flat successions with lateral thickness variations controlled by differential subsidence increased in the Arabian Basin. The transgression is marked by storm-influenced inner-platform with sandstone quartz, grainstones and restricted lime-mudstone. The Maximum marine transgression is placed in the Arab-D with reef buildups in the westernmost inner-platform. During highstand, the reefs are gently prograding out into Rimthan Arch leaving behind restricted lagoon and sabkhah/salina anhydrite
37
Best, Heidi Ann. "Sedimentology, sequence stratigraphy and reservoir potential of the Warrinilla Field, Bowen Basin /". Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09S.B/09s.bb561.pdf.
Testo completo
38
Ceglar, Nathan. "Late Jurassic to Early Cretaceous sequence stratigraphy, Northern Bonaparte Basin, Timor Sea /". Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09SB/09sbc389.pdf.
Testo completo
39
Faulkner, Tony. "Sequence stratigraphy of the Late Cretaceous Sherbook group, Shipwreck Trough, Otway Basin /". Title page, contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09S.B/09s.bf263.pdf.
Testo completo
40
Sher, Mohammad. "Seismic interpretation and sequence stratigraphy of the offshore indus basin of Pakistan". Thesis, Oxford Brookes University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326205.
Testo completo
41
Wonham, Jonathan Philip. "Sedimentology and sequence stratigraphy of tidal sandstone bodies : implications for reservoir characterisation". Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240411.
Testo completoAbstract (sommario):
Analysis of the facies and sequence stratigraphy of tidally-influenced, siliciclastic-dominated successions from five different areas has allowed a survey and comparison of the sedimentological and architectural characteristics of a variety of tidal sandstone body types. This study is concerned with: (i) describing these different sandstone body types; (ii) analysing the controls on sandstone body internal architecture, external geometry and connectivity, and (iii) outlining the implications of such studies for reservoir characterisation. Facies analysis of the studied successions by previous workers has identified the importance of tidal processes in sandstone body deposition, however, the application of sequence stratigraphy suggests reinterpretation of a number of facies. This applies, in particular, to facies interpreted as shelf sand wave deposits which have previously been recognised in all of the field study areas. These facies are now reinterpreted as incised valley fill deposits following the recognition of: (i) the estnarine facies and facies associations which make up these sandstone bodies, and (ii) the presence of sequence bounding erosional unconformities at the base of these sandstone bodies. The studied basins show contrasting subsidence rates and structural styles. Two successions from foreland basin settings have been studied: the OligO-Miocene Marine Molasse (=IOOOm thick) of the Digne-Valensole basin, and the Eocene Figols Group (",600m thick) of the Ager basin. Two orders of type-I depositional sequence, with thicknesses of lOs and l00s of metres respectively, have been identified from both areas. Passing upwards, both successions show a change from an overall transgressive to regressive setting interpreted to reflect increasing rates of sediment supply through time. Sandstone bodies of the Marine Molasse include: (i) estuarine incised valley fills; (ii) tidal inlets; (iii) delta mouth bars, and (iv) tidal flat channels. These units vary from a few metres thick and few hundred metres wide to several lOs of metres thick and several kilometres wide. Sandstone bodies of the Figols Group, by contrast, are developed within large incised valleys approximating to the scale of the Ager basin itself (6-7km wide, 15km long). These sandstone bodies are sharp-based estuarine mouth bars. The mouth bars themselves may be further compartmentaIised into erosively based sandstone lenticles «6m thick, 200m wide and <600m long) which are interpreted to have formed by the migration of very large-scale dune bedforms. The deposits of the Lower Jurassic Tilje and St0 Formations were developed within extensional basins of the Norwegian shelf and show much slower subsidence rates. The studied successions are dominated by tidal flat, tidal channel and tidal delta mouth bar deposits. Tidal flat parasequences are either coarsening- then fining-upwards or simply fining-upwards in character. Identification of retrogradationally stacked tidal flat parasequences suggests that sandstone-dominated intervals may be identified using sequence stratigraphy. The Lower Cretaceous Woburn Sands succession (up to 120m thick) shows the development of two depositional sequences in the Leighton Buzzard area. The majority of the succession consists of incised valley fill deposits showing a regressive estuarine facies association. New evidence which supports this interpretation includes the recognition of tidal flat deposits at the top of the incised valley fill, overlain by a well developed initial flooding surface. This sandstone-dominated succession shows the development of laterally extensive clay drapes which strongly compartmentalise the sandstone body. These clay drapes are interpreted to develop in the toe of laterally migrating sand banks and form an important and hitherto unreported permeability barrier type. The identification of incised valley fill deposits in a nwnber of basin settings has allowed a survey of the variability of this type of sandstone body. Incised valleys vary according to whether they show: (i) a single or a composite fill; (ii) a siliciclastic or mixed siliciclastic/carbonate infill; (iii) a retrogradational or progradational infill; (iv) presence or absence of an estuary mouth barrier, and (v) infill dominated by very large-/large-scale cross-beds or mediwn-/small-scale cross-beds. The infill character of individual incised valleys is shown to be controlled by the relative importance of rate of relative sea level rise, sediment supply and tide-dominance. Successively developed incised valleys show changing infill character related to the superimposition of low and high order cyclic controls on relative sea level change.
42
Couzens, Timothy John. "The rift to drift transition and sequence stratigraphy at passive continental margins". Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333509.
Testo completoAbstract (sommario):
Most passive margins display a prominent breakup unconformity coinciding with the rift to drift transition. The unconformity, as defined by Falvey, (1974) is of broad regional extent affecting both basins and highs and is easily recognised on seismic sections. Criteria for the recognition of the breakup unconformity include an inflection in the subsidence curve, fault terminations and volcanic strata (and/or evaporites) at the level of the unconformity. Falvey considered that it was caused by "erosion during the final uplift pulse associated with pre-breakup upwelling in the mantle". It is more likely that the uplift is caused by magmatic underplating in response to the passive upwelling of the mantle and the flexural isostatic effects of erosion throughout the syn-rift phase. The primary objective has been to quantify the amount of uplift and erosion associated with the breakup unconformity / breakup megasequence boundary. This is of particular importance in hydrocarbon exploration as it quantifies the potential loss of old reservoirs and predicts the provenance of new reservoir clastics. Two data sets, from the Grand Banks and the Northwest Shelf of Australia, have been studied. In both cases there are multiple breakup events and breakup megasequence boundaries form part of a complex tectono-stratigraphy. Regional seismic lines have been interpreted, depth converted and modelled using a new technique of combined reverse post-rift and forward syn-rift modelling. The results of this process, together with seismic megasequence analysis, show that the morphology of the breakup megasequence boundary varies systematically across a passive margin. It is strongly erosional at about 70 km landward of the continentocean boundary, where regional "breakup" uplift outweighs extensionally controlled subsidence, but may be depositional on either side of this zone. A coupled, quantitative magmatic-tectonic model has been constructed by combining the Bickle-McKenzie melt generation model with the flexural cantilever model for continental extension. The magnitude of underplating can be estimated using the Bickle-McKenzie model, in which the amount of melt produced is controlled by the extension factor, ß, and the proximity of a mantle plume convection cell.
43
Dayley, Jason. "Nonmarine Sequence Stratigraphy of the Gannett Group Southeastern Idaho and Western Wyoming". Thesis, University of Louisiana at Lafayette, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10002483.
Testo completoAbstract (sommario):
Late Jurassic through Early Cretaceous strata of the Gannett Group record initial development of the Sevier thrust belt and adjacent foreland basin. Concepts of nonmarine sequence stratigraphy were used to determine the depositional and base level history of the Gannett Group in southeastern Idaho and western Wyoming. Base level fluctuations were driven entirely by tectonic processes, while tectonic uplift in the source area was a major control on sequence development. Six measured sections were revisited or measured and correlated using the concepts of sequence stratigraphy. Four distinct sequences were identified and correlated. Each sequence can be divided into degradational, transitional, or aggradational systems tracts. Where the degradational systems tracts are preserved, they are represented by thin conglomerates. Transitional systems tracts overly the degradational systems tracts and consist of thick sections of laterally discontinuous sandstone and fluvial overbank muds, which grade laterally into continuous limestone and calcareous mudstones that comprise the aggradational systems tract.
44
Menegatti, Alessandra. "Biostratigraphy, sedimentology and high resolution sequence stratigraphy of the Mishrif Formation, Dubai". Thesis, University of Aberdeen, 2004. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=228967.
Testo completoAbstract (sommario):
The Middle to Upper Cenomanian Mishrif Formation of Dubai has been interpreted applying biostratigraphic, sedimentologic and sequence stratigraphic concepts. Fourteen wells have been analysed in core and thin-section. These key wells were chosen to cover the geographical extent of the Mishrif and its stratigraphic distribution in offshore Dubai. The identification of thirteen biofacies is based on the trends In composition of microfossil assemblages. Observations on sedimentary features, both in core and thinsection, were also made. Six age significant bioevents are used to constrain stratigraphic boundaries into a chronological framework, and also as bathymetric indicators. Beneath the top of the Middle Cenomanian a MFS (Maximum Flooding Surface) has been recognised. It is possible to correlate this surface at a regional scale. During the Late Cenomanian small intrashelf basins established in the Dubai area, but shallowwater conditions persisted at some localities. Several erosional surfaces were also identified below the base-Laffan unconformity (top MishrifFormation). Local palaeogeography and structure (e.g.: salt diapiric movement) play important roles within the Gulf region. During the Middle to Late Cenomanian the platform was rhythmically affected by exposure and erosion mainly in the north-western part of the Dubai area (structural highs). Intrashelf basins, often characterised by stagnant conditions (anoxia), were developed especially in the south-eastern part of the region. The study is focused on a better understanding of the depositional model of the Mishrif Formation.
45
Al-Tawil, Aus. "High resolution sequence stratigraphy of late Mississippian carbonates in the Appalachian Basin". Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/40423.
Testo completoAbstract (sommario):
The late Mississippian carbonates in the Appalachian Basin, U.S.A., were deposited on a huge, south-facing ramp during long-term Mississippian transgression that formed the Mississippian supersequence. The St. Louis- to Glen Dean interval consists of up to twelve fourth-order depositional sequences (300 to 400 k.y. average duration). The sequences (a few meters to over a hundred meters thick) consist of eolianites, lagoonal carbonate muds, ooid shoals, and skeletal banks, and open marine skeletal wackestone and basinal marion the ramp-slope and basin margin. Sequence boundaries are at the top of prograding red-beds, eolianites, and shoal water facies on the ramp, and beneath lowstand sand bodies and quartzose calcisiltite wedges on the ramp margin and slope. Maximum flooding surfaces are difficult to map regionally, therefore it is difficult to separate the TST from the HST of these fourth-order sequences.Ph. D.
46
Morgan, Glenn Douglas School of Biological Earth & Environmental Science UNSW. "Sequence stratigraphy and structure of the tertiary limestones in the Gulf of Papua, Papua New Guinea". Awarded by:University of New South Wales. School of Biological, Earth and Environmental Science, 2005. http://handle.unsw.edu.au/1959.4/22913.
Testo completoAbstract (sommario):
A sequence stratigraphic study was conducted on the Mendi and Darai Limestone Megasequences in the foreland area of the Papuan Basin in Papuan New Guinea. It involved the integrated use of seismic, wireline log, well core and cuttings, strontium isotope age and biostratigraphic data. This study enhanced the understanding of the structure, stratigraphy and depositional architecture of the limestones, and the morphology of the basin at the time of deposition. The results of the study were integrated with published geological and tectonic models for the Papuan Basin to develop a consistent and coherent model for the depositional history of the limestones. Eleven third-order sequences were delineated within the Mendi and Darai Limestone Megasequences. Eight depositional facies were interpreted across these sequences, namely deep-shelf, shallow-shelf, backreef, reef, shoal, forereef, basin margin and submarine fan facies. Each facies was differentiated according to seismic character and geometry, well core and cuttings descriptions, and its position in the depositional framework of the sequence. Deposition of the Mendi Limestone Megasequence commenced in the Eocene in response to thermal subsidence and eustatic sea-level rise. Sedimentation comprised open-marine, shallow-water, shelfal carbonates. During the middle of the Oligocene, the carbonate shelf was exposed and eroded in response to the collision of the Australian and Pacific Plates, or a major global eustatic sea-level fall. Sedimentation recommenced in the Late Oligocene, however, in response to renewed extensional faulting and subsidence associated with back-arc extension. This marked the onset of deposition of the Darai Limestone Megasequence in the study area. The KFZ, OFZ and Darai Fault were reactivated during this time, resulting in the oblique opening of the Omati Trough. Sedimentation was initially restricted to the Omati Trough and comprised deep and shallow-marine shelfal carbonates. By the Early Miocene, however, movement on the faults had ceased and an extensive carbonate platform had developed across the Gulf of Papua. Carbonate reef growth commenced along topographic highs associated with the KFZ, and led to the establishment of a rimmed carbonate shelf margin. Shallow to locally deeper-marine, shelfal carbonates were deposited on this shelf, and forereef, submarine fan and basin margin carbonates were deposited basinward of the shelf margin. The Uramu High and parts of the Pasca High became submerged during this time and provided sites for pinnacle reef development. During the middle of the Early Miocene, a major global eustatic sea-level fall or flexure of the Papuan Basin associated with Early Miocene ophiolite obduction subaerially exposed the carbonate shelf. This resulted in submarine erosion of the forereef and basin margin sediments. Towards the end of the Early Miocene, however, sedimentation recommenced. Shallow-marine, undifferentiated wackestones and packstones were deposited on the shelf; forereef, submarine fan and basin margin sediments were deposited basinward of the shelf margin; and reef growth recommenced along the shelf margin and on the Pasca and Uramu Highs. By the end of the Early Miocene, however, the pinnacle reef on the Pasca High had drowned. During the middle of the Middle Miocene, subtle inversion associated with ophiolite obduction subaerially exposed the carbonate shelf, and resulted in submarine erosion of the forereef and basin margin sediments. Sedimentation recommenced towards the end of the Middle Miocene, however, in response to eustatic sea-level rise and flexure of the crust associated with foreland basin development. Shallow marine, undifferentiated wackestones, packstones and grainstones were deposited on the shelf; carbonate shoals were deposited along the shelf margin; and forereef, submarine fan and basin margin carbonates were deposited basinward of the shelf margin. Carbonate production rapidly outpaced accommodation space on the shelf during this time, resulting in highstand shedding and the development of a large prograding submarine fan complex basinward of the shelf margin. By the Late Miocene, carbonate deposition had ceased across the majority of the study area in response to a major global eustatic sea-level fall or inversion associated with terrain accreation events along the northern Papuan margin. Minor carbonate deposition continued on parts of the Uramu High, however, until the middle of the Late Miocene. During the latest Miocene, clastic sediments prograded across the carbonate shelf, infilling parts of the foreland basin. Plio-Pleistocene compression resulted in inversion and erosion of the sedimentary package in the northwestern part of the study area. In the southeastern part of the Papuan Basin, however, clastic sedimentation continued to the present day.
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Richardson, Jeffery G. "Miospore Biostratigraphy, Sequence Stratigraphy, and Glacio-Eustatic Response of the Borden Delta (Osagean; Tournaisian/Visean) of Kentucky and Indiana, U.S.A". The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1048176261.
Testo completo
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Ritter, Geoffrey William. "Lithofaces and Sequence Architecture of the Upper Paradox Formation (Middle Pennsylvanian)in the Subsurface Northern Blanding Subbasin, Paradox Basin, Utah". BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7319.
Testo completoAbstract (sommario):
THE PARADOX Basin is a northwest-southeast trending intracratonic basin that formedin southwestern Colorado, southeastern Utah and adjacent parts of Arizona and New Mexicoduring the late Paleozoic Era. During rise of the adjacent Uncompahgre Uplift (Ancestral RockyMountains) the rapidly subsiding basin was filled with over 2000 m of Permo-Pennsylvaniansediments. Stacked depositional sequences accumulated in three roughly parallel facies belts: anortheastern clastic belt (adjacent to uplift), a central salt and black shale belt, and asouthwestern carbonate belt. Over 400 million barrels of oil have been extracted from upperParadox (Desert Creek and Ismay) carbonates in the southern Blanding Subbasin (Greater AnethField) since 1956. The sedimentology and sequence stratigraphy of Paradox Shelf strata on thewalls of the San Juan River gorge and in the subsurface Aneth Buildup are well documented.Less well documented are the stratigraphy and facies architecture of basinward extensions ofupper Paradox sequences in the northern part of the Blanding Subbasin.Detailed analysis of the lower and upper Desert Creek and lower and upper Ismay 4thordersequences from three cores (Long Point, Lewis Road, Cedar Point) demonstrate theexistence of distinctive basinward depositional trends. Compared to sequences exposed on theParadox Shelf (San Juan River outcrops) and the Aneth Buildup, sequences in the more distalnorthern Blanding Subbasin are thinner, are dominated by muddy carbonate facies, displaylimited occurrences of porous phylloid-algal and oolitic carbonates, contain thicker, morecomplete occurrences of black shale, and possess distinctive suites of lowstand facies (quartzsandstone on the shelf, bedded and nodular evaporates in the basin). Vertically, the four 4th-ordersequences display 2nd-order progradation of the Paradox Shelf through Desert Creek and Ismaytime. Carbonate-starved sequences (4th order) and parasequences (5th order) comprised of muddominatedfacies are succeeded upward by thicker, more grain-rich sequences andparasequences. The implications for the petroleum system relative to established oil and gasfields is that conventional reservoir rock facies are rare, except in small, isolated buildups.Meteoric diagenesis associated with 4th-order lowstands of sea level has reduced overallpermeability. Lowstand conditions also promoted limited precipitation of pore-occludingevaporite cement. The maximum-flood Chimney Rock, Gothic and Hovenweep shales arethicker and contain a more complete succession of basinal cycles than updip occurrences of thesepetroleum source rocks. A suite of samples from the Gothic Shale from the Cedar Point coreindicate higher burial maturity (kerogen has mostly been converted to gas) compared to valuesderived from the outcrop belt and more proximal subsurface samples.
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Dilliard, Kelly Ann. "Sequence stratigraphy and chemostratigraphy of the Lower Cambrian Sekwi Formation, Northwest Territories, Canada". Online access for everyone, 2006. http://www.dissertations.wsu.edu/Dissertations/Spring2006/K%5FDilliard%5F042406.pdf.
Testo completo
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McCrimmon, G. Glen. "Sedimentology and sequence stratigraphy of the lower Cretaceous Clearwater Formation, Cold Lake, Alberta". Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/9765.
Testo completoAbstract (sommario):
The lower Cretaceous (Aptian to Albian) CLearwater Formation at Cold Lake, Alberta contains a complex assemblage of silicicastic strata. On the basis of detailed core analyses, Clearwater Formation strata have been subdivided into eight lithofacies and six recurring, facies associations. These facies associations are: (1) Tidal bar, (2) Sand flat, (3) Tidal-fluvial channel, (4) Fluvial channel, (5) Shoreface to foreshore, and (6) Offshore. Correlation of the facies associations and their bounding time-significant surfaces has led to the interpretation that Clearwater Formation strata are marine and tidally-influenced coastal embayment deposits that comprise four unconformity-bounded depositional sequences (1 to 4). Each sequence is made up of one or more incised valley-fill deposits within a backstepping parasequence set, indicating deposition in the transgressive system tract. The incised valley-fill deposits of each sequence, however, are interpreted a basinward shift of deltaic facies within a larger-scale marine transgression. Together, the four depositional sequences of the Clearwater Formation therefore compose a progradational sequence set. The Clearwater Formation is the primary reservoir unit at the Cold Lake heavy oil sands area with reserves estimated at $11,050\times 10\sp6$ m$\sp3$ of heavy crude bitumen. The distribution of hydrocarbons is related primarily to the distribution of reservoir quality strata and positive structure. Strata of facies associations 2 (sand flat) and 4 (fluvial channel) are observed to have the best reservoir quality. In the study area these strata occur in each of the upper three depositional sequences but are most abundant in sequences 3 and 4. The spatial distribution of reservoir-quality strata in Sequence 2 is such that additional hydrocarbon deposits are inferred to exist south of the study area, along the axis of the incised valley trend. Furthermore, northwest of the study are, Sequence 4 probably contains additional reservoir-quality strata along the trend of its incised valleys.