Дисертації з теми "Southern margin"
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Radeff, Giuditta. "Geohistory of the Central Anatolian Plateau southern margin (southern Turkey)." Phd thesis, Universität Potsdam, 2014. http://opus.kobv.de/ubp/volltexte/2014/7186/.
Повний текст джерелаIl Bacino di Adana (Turchia meridionale) é situato in posizione esterna rispetto al margine sud-orientale del plateau anatolico centrale. Il bacino risulta ubicato in posizione strategica per registrare i principali cambiamenti della topografia e dell’assetto tettonico avvenuti durante il Neogene nel Mediterraneo orientale. Utilizzando dati sismici provenienti dall’industria petrolifera abbiamo correlato 34 profili sismici con le unitá corrispondenti affioranti nel Bacino di Adana. La conversione da tempi a profonditá dei profili sismici interpretati ci ha permesso di ricostruire la curva di subsidenza del Bacino di Adana e di individuare un evento caratterizato da un importante aumento della subsidenza associato ad un considerevole incremento del tasso di sedimentazione. Questo evento, avvenuto tra 5.45 e 5.33 Ma ha portato alla deposizione di quasi 1500 km3 di conglomerati e marne. La nostra analisi di provenienza della porzione conglomeratica mostra che la maggior parte del sedimento proviene dal margine sud-orientale del plateau anatolico centrale e dalle aree situate a nord di questo. La comparazione di questi risultati con la composizione litologica di conglomerati recenti e con le litologie affioranti nei bacini di drenaggio attuali mostra cambiamenti rilevanti tra le aree di provenienza del sedimento Messiniane e quelle attuali. Riteniamo che questi cambiamenti nelle aree sorgente siano il risultato del sollevamento e della successiva erosione del margine sud-orientale del plateau anatolico centrale. Questa ipotesi é supportata dal confronto delle curve di subsidenza del Bacino di Adana e del Bacino di Mut, un bacino principalmente neogenico situato sulla sommitá del margine meridionale del plateau. La comparazione delle due curve di subsidenza mostra che l’evento di forte subsidenza del Bacino di Adana é coevo ad un episodio di sollevamento del margine meridionale del plateau anatolico centrale. La raccolta di un fitto dataset strutturale acquisito nella regione di Adana mostra differenti stili deformativi per i margini nord-occidentale e sud-orientale del bacino. La porzione nord-occidentale del bacino, debolmente sismica, é caratterizzata da strutture estensionali e transtensive che tagliano I depositi neogenici, verosimilmente accomodando il sollevamento differenziale tra il bacino e il margine sud-orientale del plateau. Riteniamo che l’evoluzione tettonica del margine meridionale del plateau anatolico centrale e la contemporanea subsidenza e sedimentazione nel Bacino di Adana sia da ricondurre a processi litosferici profondi, in particolar modo delaminazione litosferica e slab break-off.
Radeff, Giuditta [Verfasser], and Domenico [Akademischer Betreuer] Cosentino. "Geohistory of the Central Anatolian Plateau southern margin (southern Turkey) / Giuditta Radeff. Betreuer: Domenico Cosentino." Potsdam : Universitätsbibliothek der Universität Potsdam, 2014. http://d-nb.info/1058741004/34.
Повний текст джерелаBergh, Eugene. "Neogene to quaternary foraminifera from the western margin of southern Africa." Doctoral thesis, Faculty of Science, 2019. http://hdl.handle.net/11427/30436.
Повний текст джерелаMohamed, Hwedi Abdulsalam. "The Holocene palaeoenvironments of the rift margin in Southern Jordan (Wadi Faynan)." Thesis, University of Huddersfield, 2000. http://eprints.hud.ac.uk/id/eprint/4871/.
Повний текст джерелаSmart, Susannah Mary. "Asphaltites from the Southern Australian margin : submarine oil seeps or maritime artefacts? /." Adelaide, 1999. http://web4.library.adelaide.edu.au/theses/09SB/09sbs636.pdf.
Повний текст джерелаHall, Lisa Sarah. "Cenozoic deformation at the southern end of the Hikurangi Margin, New Zealand." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403720.
Повний текст джерелаBall, Philip Joseph. "Break-up history and evolution of the southern passive margin of Australia." Thesis, Royal Holloway, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421466.
Повний текст джерелаWolfenden, Ellen. "Evolution of the southern Red Sea Rift : birth of a magnetic margin." Thesis, Royal Holloway, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405194.
Повний текст джерелаAgurto, Detzel Hans. "Seismotectonics of the southern subduction Chilean margin revealed by recent aftershock sequences." Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/8553/.
Повний текст джерелаMcGowan, James Andrew. "Hercynian transpressional tectonics at the southern margin of the Central Iberian Zone, western Spain." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358641.
Повний текст джерелаBoard, Warwick Stuart. "Fluid evolution and mineralising potential in the outer margin of the southern Gariep Belt." Master's thesis, University of Cape Town, 1998. http://hdl.handle.net/11427/9647.
Повний текст джерелаFluid inclusion analyses of quartz veins of various generations from the outer margin of the southern Gariep Belt reveal the presence of two chemically distinct fluid populations: the pre-orogenic, rift-related Rosh Pinah ore-forming fluid and the orogenic fluids. The oreforming fluid is more saline and chemically more complex than the orogenic fluids, probably representing hot, chemically evolved hypersaline brines induced by rift-related magmatism. Four generations (D₁/D₂, D₃, D₄ and D₅) of orogenic veins are recognised on the basis of their structural relationships. The orogenic fluids are chemically similar, dominantly aqueous and generally of moderate to low salinities (<10 wt% NaCleq), with the few higher salinity estimates (10-16 wt% NaCleq) being attributed to the interaction of some of the orogenic fluids with evaporitic horizons. A trend of decreasing temperature with a decrease in age (D₄> D₁/D₂>D₃>D₅) is developed within the orogenic fluids, with the exception of those fluids related to the emplacement of the Kuboos Pluton, which yielded the highest temperatures. The D₁/D₂ fluids from the northern and Vanrhynsdorp areas were hotter than the fluids from the central area, whereas the D₃ and D₅ fluids exhibit no apparent temperature variation as a function of area. D₄ fluids show a decrease in temperature further away from the pluton. Estimates of the maximum metamorphic pressure recorded in the outer margin of the belt have been further constrained, using microthermometry results in conjunction with mineral assemblages, to 2.9-3.6 kbar, 2.9-3.1 kbar and 1.8-3.1 kbar for the northern, central and Vanrhynsdorp areas, respectively. Field observations and fluid inclusion analyses suggest channeled fluid flow on a regional rather than on an intra-formational scale, even though a rock-buffered system is suggested by oxygen isotope results. A different, largely rock-dominated fluid system was developed within the relatively impermeable carbonate units compared with the fluid system developed within the rest of the outer margin of the belt. The D₁/D₂ fluids probably represent circulating formation and metamorphic waters that were advectively forced out of the orogen and into the foreland, whereas channeled meteoric fluid flow most likely dominated during the transtensive phase of the orogeny. The D₄ fluids probably contain a magmatic component, in addition to the meteoric component. Comparisons between the ore-forming fluid and the orogenic fluids indicate that the latter have neither the required salinities, nor the required chemistry necessary in order to transport sufficient metals to produce a massive sulphide deposit the size of Rosh Pinah. The chemistry of the orogenic fluids are, however, similar to those associated with gold remobilisation and as such the potential for gold mineralisation related to these orogenic fluids should not be ruled out. Base metal sulphide exploration within the outer margin of the belt should be confined to rocks of the Hilda Subgroup. The recognition of highly saline, chemically complex nonorogenic quartz vein-hosted fluid inclusions is considered critical from the point of view of base metal sulphide exploration.
Foglietta, Mauro. "Depositional and tectonic controls on reservoir quality on the Apulian Platform margin, southern Apennines, Italy." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428163.
Повний текст джерелаBurgess, Samantha Nicole. "Neritic biofacies on the southern margin : feraminiferal profiles across the Great Australian Bight and the Bonney Shelf /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09SB/09sbb9557.pdf.
Повний текст джерелаContreras, Jorham [Verfasser], and Thilo [Akademischer Betreuer] Bechstädt. "Seismo-stratigraphy and numerical basin modeling of the southern Brazilian continental margin / Jorham Contreras ; Betreuer: Thilo Bechstädt." Heidelberg : Universitätsbibliothek Heidelberg, 2011. http://d-nb.info/1179229681/34.
Повний текст джерелаZhang, Peizhen. "Rate, amount, and style of late cenozoic deformation of southern Ningxia, northeastern margin of Tibetan Plateau, China." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/60418.
Повний текст джерелаFive folded maps in pocket.
Includes bibliographies.
by Peizhen Zhang.
Ph.D.
Chen, Yi. "The redefined centre, periphery and margin : the long-term interaction sphere of southern China 3000-221 BC." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:0ae8b337-7a65-427d-9a37-9be7f4d17f9c.
Повний текст джерелаHague, Paul Frederick. "The structural and volcanic evolution of tertiary basins along the southern margin of the Rhodope Massif, northeastern Greece." Thesis, University of Southampton, 1993. https://eprints.soton.ac.uk/428198/.
Повний текст джерелаPrince, Philip S. "Evolution of transient topography on passive margins: A study of landscape disequilibrium in the southern Appalachian Mountains." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77065.
Повний текст джерелаPh. D.
Richardson, Janet Cristine. "Antecedent fluvial systems on an uplifted continental margin : constraining Cretaceous to present-day drainage basin development in southern South Africa." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/14429/.
Повний текст джерелаAygül, Mesut [Verfasser], Aral Akademischer Betreuer] Okay, and Roland [Akademischer Betreuer] [Oberhänsli. "Pre-collisional accretion and exhumation along the southern Laurasian active margin, Central Pontides, Turkey / Mesut Aygül ; Aral Okay, Roland Oberhänsli." Potsdam : Universität Potsdam, 2015. http://d-nb.info/1219149632/34.
Повний текст джерелаAygül, Mesut [Verfasser], Aral [Akademischer Betreuer] Okay, and Roland [Akademischer Betreuer] Oberhänsli. "Pre-collisional accretion and exhumation along the southern Laurasian active margin, Central Pontides, Turkey / Mesut Aygül ; Aral Okay, Roland Oberhänsli." Potsdam : Universität Potsdam, 2015. http://d-nb.info/1219149632/34.
Повний текст джерелаSattar, Nauman. "Mapping of Lower Cretaceous (Knurr Sandstone) turbidite lobes using Seismic Stratigraphy and prospectivity along the southern Loppa High Margin, Hammerfest Basin, Barents Sea, Norway." Thesis, Uppsala universitet, Geofysik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-183699.
Повний текст джерелаSasseville, Christian. "Characteristics of Mesoarchean and Neoarchean suprascrustal sequences at the southern margin of North Caribou terrane in the Wallace Lake greenstone belt, Superior Province, Canada." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29472.
Повний текст джерелаPerfili, Christopher M. "Lithofacies, Sequence Stratigraphy, and Sedimentology of Desert Creek Platform, Slope, and Basin Carbonates, Southern Margin of the Aneth Complex, Middle Pennsylvanian, Paradox Basin, Utah." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8741.
Повний текст джерелаGharbi, Mohamed. "Relationship between the southern Atlas foreland and the eastern margin of Tunisia (Chotts-Gulf of Gabes) : tectono-sedimentary, fault kinematics and balanced cross section approaches." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4340/document.
Повний текст джерелаThe structural architecture of the Tunisian foreland consists in a mixed tectonic style with deep-seated basement faults, shallower décollements within sedimentary cover and salt diapirism. Structural geometry and orientation of the pre-existing Triassic-Turonian extensional structures controlled subsequent contractional deformation within the sedimentary cover. The rifting of the margin started in the late Permian–Triassic and continued up to the Turonian. From the inversion of the successive compressions, the development of ENE-trending thrust-related anticlines such as the Orbata and Chemsi structures are controlled by the reactivation of the inherited Mesozoic faults. Geologic data from this region indicate that the positive tectonic inversion occurred probably during Late Cretaceous period. The Cenozoic tectonic compressions in the southern Atlassic domain occurred during three periods: Late Eocene, Late Miocene and Plio-Quaternary. The Fault kinematic analysis reveals a temporal change in states of stress that occurred during the Late Cenozoic. A paleostress (Miocene-Pliocene) state is characterized by a regional compressional tectonic regime with a mean N134±09°E trending compressional axis (σ1). A modern (Quaternary to present-day) state of stress also corresponds to compressional tectonic regime with a regionally mean N05±10°E trending horizontal σ1. This study underlines the predominant role of inherited basement structures acquired during the evolution of the southern Tethyan margin, and their influence on the geometry of the Atlassic fold-and-thrust belt. At the southern Atlas of Tunisia our restoration shows a surface shortening of ~8.1 km (~7.3%)
Schöner, Robert. "Comparison of Rotliegend sandstone diagenesis from the northern and southern margin of the North German Basin, and implications for the importance of organic maturation and migration." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982751273.
Повний текст джерелаUgueto, Lilian L. Navarro. "Depositional architecture and evolution of deep-water base-of-slope and slope channel complexes in a passive-margin setting: Isaac Formation, Windermere Supergroup (Neoproterozoic), southern Canadian Cordillera." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27278.
Повний текст джерелаHe, Yanhong, and 何艷紅. "Ages and geochemistry of the Xiong'er volcanic rocks along the southern margin of the North China Craton: implications for the outgrowths of the paleo-mesoproterozoicsupercontinent Columbia (Nuna)." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B4163424X.
Повний текст джерелаHuber, Barbara [Verfasser], and Heinrich [Akademischer Betreuer] Bahlburg. "Provenance analysis of sediments from IODP Expedition 341 sites U1417 and U1418 : implications on climate-tectonic interactions at the southern Alaska continental margin / Barbara Huber ; Betreuer: Heinrich Bahlburg." Münster : Universitäts- und Landesbibliothek Münster, 2019. http://d-nb.info/1188706454/34.
Повний текст джерелаHe, Yanhong. "Ages and geochemistry of the Xiong'er volcanic rocks along the southern margin of the North China Craton implications for the outgrowths of the paleo-mesoproterozoic supercontinent Columbia (Nuna) /." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B4163424X.
Повний текст джерелаAndrade, Poliana Carvalho de. "Variações de paleoprodutividade na plataforma continental interna ao largo de Itajaí-SC (26º59'16.8\"S - 048º04'33.6\"W) durante o Holoceno: uma abordagem de multi-indicadores." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/21/21133/tde-27072011-110113/.
Повний текст джерелаMicrofaunal, sedimentological and geochemical analyses from a core collected on the inner shelf off Itajaí, SC, allowed us to recognized , in the last 7,600 years, three phases with different organic matter fluxes and hydrodynamic conditions. The rst phase (7,600 5,000 years cal. B.P.) is characterized by low productivity, evidenced by low values of productivity proxies (organic carbon (Corg), calcium carbonate (CaCO3) and Benthic Foraminífera High Productivity index - BFHP), more intense hydrodynamic regime (dominance of coarser sediments and higher frequencies of Globocassidulina subglobosa) and waters with more oxygen availability (higher values of the Benthic Foraminífera Oxic Index BFOI and relatively high percentages of epifaunal species). The climate during this period was relatively dry and sea-level was approximately 3 m above the present. The second phase (5,000 3,000 years cal. B.P.) is marked by a relative increase in productivity (increase of Corg, CaCO3 and BFHP), hydrodynamical conditions were probably less intense (lower frequencies of G. subglobosa and muddy sediments), and oxygen availability decreased (lower BFOI index values). The climate apparently became progressively more humid and a progressive decline of the sea-level occurred. The third phase (3,000 900 years cal. B.P.) is characterized by a significant increase of productivity (higher percentages of Corg, CaCO3, infaunal and detritivores species, and increase of BFHP index values), probably bottom currents were less intense (muddy sediments and lower frequencies of G. subglobosa) and oxygen contents more restrictive (lower BFOI values). A significant increase in the input of continental material occurs during this period, as highlighted by an increase of Buliminella elegantissima frequencies and increase of the Fe/Ca and Ti/Ca ratios. The increase of productivity could be related to moisture increase throughout the Holocene, due to the intensification of the South American Monsoon system (SAMS) caused by variations in the precession cycle and possibly increased El Niño frequency, which corroborates the increase in rainfall in southern Brazil. The wetter climate and strengthening cold front may have favored the penetration of cold water rich in nutrients from the south, related to the discharge of the Rio de La Plata
Wobbe, Florian [Verfasser], Vikram [Akademischer Betreuer] Unnithan, Karsten [Akademischer Betreuer] Gohl, Klaus [Akademischer Betreuer] Grosfeld, Carmen [Akademischer Betreuer] Gaina, and Primio Rolando [Akademischer Betreuer] Di. "Crustal and lithosphere dynamics of the Southern Pacific and the West Antarctic margin / Florian Wobbe. Betreuer: Vikram Unnithan ; Karsten Gohl. Gutachter: Vikram Unnithan ; Klaus Grosfeld ; Carmen Gaina ; Rolando Di Primio." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2014. http://d-nb.info/1087315581/34.
Повний текст джерелаSonibare, Wasiu Adedayo. "Structure and evolution of basin and petroleum systems within a transformrelated passive margin setting : data-based insights from crust-scale 3D modelling of the Western Bredasdorp Basin, offshore South Africa." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96832.
Повний текст джерелаENGLISH ABSTRACT: This study investigates the crustal structure, and assesses the qualitative and quantitative impacts of crust-mantle dynamics on subsidence pattern, past and present-day thermal field and petroleum system evolution at the southern South African continental margin through the application of a multi-disciplinary and multi-scale geo-modelling procedure involving both conceptual and numerical approaches. The modelling procedure becomes particularly important as this margin documents a complex interaction of extension and strike-slip tectonics during its Mesozoic continental rifting processes. Located on the southern shelf of South Africa, the Western Bredasdorp Basin (WBB) constitutes the focus of this study and represents the western section of the larger Bredasdorp sub-basin, which is the westernmost of the southern offshore sub-basins. To understand the margin with respect to its present-day structure, isostatic state and thermal field, a combined approach of isostatic, 3D gravity and 3D thermal modelling was performed by integrating potential field, seismic and well data. Complimenting the resulting configuration and thermal field of the latter by measured present-day temperature, vitrinite reflectance and source potential data, basin-scale burial and thermal history and timing of source rock maturation, petroleum generation, expulsion, migration and accumulation were forwardly simulated using a 3D basin modelling technique. This hierarchical modelling workflow enables geologic assumptions and their associated uncertainties to be well constrained and better quantified, particularly in three dimensions. At present-day, the deep crust of the WBB is characterised by a tripartite density structure (i.e. prerift metasediments underlain by upper and lower crustal domains) depicting a strong thinning that is restricted to a narrow E-W striking zone. The configuration of the radiogenic crystalline crust as well as the conductivity contrasts between the deep crust and the shallow sedimentary cover significantly control the present-day thermal field of the study area. In all respects, this present-day configuration reflects typical characteristics of basin evolution in a strike-slip setting. For instance, the orientations of the deep crust and fault-controlled basin-fill are spatially inconsistent, thereby indicating different extension kinematics typical of transtensional pull-apart mechanisms. As such, syn-rift subsidence is quite rapid and short-lived, and isostatic equilibrium is not achieved, particularly at the Moho level. Accompanied syn-rift rapid subsidence and a heat flow peak led to petroleum preservation in the basin since the Early Cretaceous. Two additional post-rift thermal anomalies related to the Late Cretaceous hotspot mechanism and Miocene margin uplift in Southern Africa succeeded the syn-rift control on maturation. This thermal maturity of the five mature source rocks culminated in four main generation and three main accumulation phases which characterise the total petroleum systems of the WBB. The Campanian, Eocene and Miocene uplift scenarios episodically halted source maturation and caused tertiary migration of previously trapped petroleum. Petroleum loss related to the spill point of each trap configuration additionally occurs during the Late Cretaceous-Paleocene and Oligocene-Early Miocene. The timing and extent of migration dynamics are most sensitive to the geological scenario that combined faulting, intrusive seal bypass system and facies heterogeneity. In fact, for models that do not incorporate facies heterogeneity, predicted past and present-day seafloor leakage of petroleum is largely underestimated. This complex interplay of generation and migration mechanisms has significant implications for charging of petroleum accumulations by multiple source rocks. Due to early maturation and late stage tertiary migration, the syn-rift source rocks particularly Mid Hauterivian and Late Hauterivian source intervals significantly control the extent of petroleum accumulation and loss in the basin. Lastly, the modelled 3D crustal configuration and Mezosoic to Cenozoic thermal regime of the WBB dispute classic uniform lithospheric stretching for the southern South African continental margin. Rather, this PhD thesis confirms that differential thinning of the lithosphere related to a transtensional pull-apart mechanism is the most appropriate for accurately predicting the evolution of basin and petroleum systems of the margin. Also, the presented 3D models currently represent the most advanced insights, and thus have clear implications for assessing associated risks in basin and prospect evaluation of the margin as well as other similar continental margins around the world.
AFRIKAANSE OPSOMMING: Hierdie studie ondersoek die korsstruktuur en evalueer die kwalitatiewe en kwantitatiewe impakte van kors-mantel-dinamika op insinkingspatroon, die termiese veld en petroleumstels evolusie aan die suidelike Suid-Afrikaanse kontinentale grens, in die hede en die verlede, deur die toepassing van ’n multidissiplinêre en multiskaal-geomodelleringsprosedure wat beide konseptuele en numeriese benaderings behels. Die modelleringsprosedure veral is belangrik aangesien hierdie kontinentale grens ’n komplekse interaksie van uitbreidings- en strekkingsparallelle tektoniek gedurende die Mesosoïese vastelandskeurprosesse daarvan dokumenteer. Omdat dit op die suidelike platvorm van Suid-Afrika geleë is, maak die Westelike Bredasdorp Kom (WBK) die fokus van hierdie studie uit, en verteenwoordig dit die westelike deel van die groter Bredasdrop-subkom, wat die verste wes is van die suidelike aflandige subkomme. Om die grens met betrekking tot sy huidige struktuur, isostatiese staat en termiese veld te verstaan, is ’n kombinasie benadering bestaande uit isostatiese, 3D-gravitasie- en 3D- termiese modellering gebruik deur potensiëleveld-, seismiese en boorgatdata te integreer Ondersteunend totot die gevolglike konfigurasie en termiese veld van die laasgenoemde deur middel van hedendaagse temperatuur, soos gemeet, vitriniet-refleksiekoëffisiënt en bronpotensiaal data, komskaal-begrawing en termiese geskiedenis en tydsberekening van brongesteentematurasie, is petroleumgenerasie, -uitwerping, -migrasie en -akkumulasie in die toekoms gesimuleer deur gebruik te maak van ’n 3D-kommodelleringstegniek. Hierdie hierargiese modelleringswerkvloei maak dit moontlik om geologiese aannames en hulle geassosieerde onsekerhede goed aan bande te lê en beter te kwantifiseer, veral in drie dimensies. In die hede word die diep kors van die WBK gekarakteriseer deur ’n drieledige digtheidstruktuur (met ander woorde voorrift-metasedimente onderlê deur bo- en benedekors domeine) wat dui op ’n baie wesenlike verdunning, beperk tot ’n dun O-W-strekkingsone. Die konfigurasie van die radiogeniese kristallyne kors, sowel as die konduktiwiteitskontraste tussen die diep kors en die vlak sedimentêre dekking, beheer grotendeels die hedendaagse termiese veld van die studiearea. Hierdie hedendaagse konfigurasie weerspieël in alle opsigte tipiese eienskappe van kom-evolusie in ’n skuifskeur omgewing. Byvoorbeeld, Die oriëntasies van die diep kors en verskuiwingbeheerde komsedimentasie byvoorbeeld is ruimtelik inkonsekwent en dui daardeur op verskillende ekstensiekinematika, tipies van transtensionale tensiemeganisme. As sulks, is sin-rift-versakking taamlik vinnig en kortstondig, en word isostatiese ekwilibrium nie by die Moho-vlak, in die besonder, bereik nie. Samehangende sin-rift vinnige versakking en hittevloeihoogtepunt het gelei tot petroleum behoud in die kom sedert die vroeë Kryt. Twee bykomende post-rift termiese anomalieë wat verband hou met die laat Kryt-“hotspot” meganisme en die Mioseense kontinentale grensopheffing in Suidelike Afrika het die sin-rift-beheer met maturasie opgevolg. Hierdie termiese maturiteit van die vyf gematureerde brongesteentes het in vier hoofgenerasie- en drie hoofakkumulasie fases, wat die totaliteit van die petroleumstelsels van die WBK karakteriseer, gekulmineer. Die Campaniese, Eoseense en Mioseense opheffings senarios het episodies bronmaturasie gestop en tersiêre migrasie van petroleum wat vroeër opgevang was veroorsaak. Addisioneel vind petroleumverlies gekoppel aan die spilpunt van elke opvanggebiedkonfigurasie tydens die laat Kryt-Paleoseen en Oligoseenvroeë Mioseen plaas. Die tydstelling en omvang van migrasiedinamika is die sensitiefste vir die geologiese scenario wat verskuiwing, seëlomseilingstelsel en fasiesheterogeniteit kombineer. Trouens, vir modelle wat nie fasiesheterogeniteit inkorporeer nie, is voorspellings van vroeëre en huidige seebodemlekkasie van petroleum grotendeels onderskattings. Hierdie komplekse wisselwerking van generasie- en migrasiemeganismes het beduidende implikasies vir die laai van petroleumakkumulasies deur veelvoudige brongesteentes. Vanweë vroeë maturasie en laatstadiumtersiêre migrasie, oefen die sin-rift-brongesteentes, veral middel Hauterivium- en laat Hauteriviumbronintervalle, beduidende beheer oor die omvang van petroleumakkumulasie en -verlies in die kom uit. Laastens weerspreek die gemodelleerde 3D-korskonfigurasie en Mesosoïese-tot-Senosoïesetermiese regime van die WBK ’n klassieke uniforme litosferiese rekking vir die suidelike Suid- Afrikaanse kontinentale grens. Inteendeel, hierdie PhD-proefskrif bevestig dat ’n differensiële verdunning van die litosfeer, gekoppel aan ’n transtensiemeganisme, die beste geskik is om ’n akkurate voorspelling oor die evolusie van kom- en petroleumstelsels van die kontinentale grens mee te maak. Verder, verteenwoordig die 3D-modelle, wat hier aangebied word, tans die mees gevorderde insigte, en het hierdie modelle dus duidelike implikasies vir die assessering van verwante risiko’s in kom- en petroleum teikene valuering van die kontinentale grens, so wel as van ander soortgelyke kontinentale grense regoor die wêreld.
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Повний текст джерела"A dissertation submitted to the Graduate Faculty of Georgia Southern University in partial fulfillment of the requirements for the degree Doctor of Education." Under the direction of Meta Y. Harris. ETD. Electronic version approved: May 2007. Includes bibliographical references (p. 143-150) and appendices.
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Повний текст джерелаB.S.
Bachelors
Health and Public Affairs
Legal Studies
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Повний текст джерела"A dissertation submitted to the Graduate Faculty of Georgia Southern University in partial fulfillment of the requirements for the degree Doctor of Education." Under the direction of John Weaver. ETD. Electronic version approved: May 2008. Includes bibliographical references (p. 139-149)
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