Готові списки джерел за темами / Proterozoic sedimentary basins

Добірка наукової літератури з теми "Proterozoic sedimentary basins"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Proterozoic sedimentary basins"

Sønderholm, M., and H. F. Jepsen. "Proterozoic basins of North Greenland." Bulletin Grønlands Geologiske Undersøgelse 160 (January 1, 1991): 49–69. http://dx.doi.org/10.34194/bullggu.v160.6713.

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Proterozoic sedimentary and associated igneous rocks along the margin of the Precambrian crystalline shield in North Greenland have been studied by several geological field-teams since 1912 when they were first investigated during the First Thule Expedition. More recently, the Proterozoic strata of North Greenland have been studied in greater detail by the Geological Survey of Greenland (GGU) during the North Greenland Project of 1978-80 and 1983-85. The present paper reviews these studies in an attempt to elucidate the development of the sedimentary basins in North Greenland during the Proterozoic.

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Zamil, M. Sh. "A possible model of the Paleozoic sedimentary basins evolution at the North African platform." Proceedings of higher educational establishments. Geology and Exploration, no. 6 (December 28, 2017): 68–73. http://dx.doi.org/10.32454/0016-7762-2017-6-68-73.

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A dual model of the Paleozoic basins development, disposing on the Late Proterozoic (Pan-African) and the Early Proterozoic (Eburnean) crust, has been proposed. The formation of the first group basins is connected with the subsiding of the sections of the cooling gneissic-domes of«rejuvenated» (Early Precambrian but tectonically reworked at the end of the Proterozoic) Pan-African crust. Accordingly, the development of the second group basins is a result of the Precambrian deep sited (mantle) magmatic chambers cooling and subsiding together with the sites of the old lithosphere, covering them. The manifestation of the Vendian volcanic units on Anti-Atlas, Ugarta, Regibat-Eglab uplifts is the most possible evidence of the mantle magmatic activity, which could create those chambers.

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Hopkins, Roy M. "THE CENTRAL AUSTRALIAN BASINS." APPEA Journal 29, no. 1 (1989): 347. http://dx.doi.org/10.1071/aj88030.

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The Amadeus and Ngalia Basins are two of several intracratonic basins situated in the central region of the Australian Continent and underlain by Upper Proterozoic and Lower Palaeozoic sedimentary rocks.In the Amadeus Basin, the preserved sedimentary section has been deformed by several orogenic events through geological history, with salt tectonics playing an important role in the structural evolution. The Ordovician System is the primary exploration objective. The Cambrian and Proterozoic sequences, which also carry rock strata having source, reservoir and sealing properties, are secondary targets. However, these latter units are sparsely explored, and only limited information is available on their petroleum prospectiveness. Three of the four petroleum accumulations found to date are in Ordovician sandstones, with the fourth accumulation contained in Cambrian sandstones.The initial drilling phase in the Amadeus Basin in the early 1960s was concentrated on geologically defined surface antic :nes, with seismic surveying becoming the principal technique employed in subsequent exploration phases. The ongoing work has demonstrated a major untested structural play associated with a regional thrust fault system — in particular, combination dip and fault closures developed on the underthrust blocks. Stratigraphic prospects also are present in the Amadeus Basin, but none of these yet has been drilled.The Ngalia Basin is similar stratigraphically and structurally to the Amadeus Basin and is considered prospective for oil and gas. Much less work has been done in the Ngalia than in the Amadeus, with only one well drilled in the entire basin. The well yielded a gas snow from a Proterozoic formation, and other direct hydrocarbon indications have been recorded elsewhere in the basin. Rock units having source, reservoir and sealing parameters are present, as are structures capable of forming traps. Again, these are associated largely with a complex regional thrust fault system.

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Gorton, Justin, and Alison Troup. "Petroleum systems of the Proterozoic in northwest Queensland and a description of various play types." APPEA Journal 58, no. 1 (2018): 311. http://dx.doi.org/10.1071/aj17115.

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As part of Queensland Government’s Strategic Resources Exploration Program, in conjunction with the Australian Government’s Exploring for the Future program, a study to improve the subsurface knowledge of Proterozoic basins in northwest Queensland (NWQ) is underway. Proterozoic sedimentary basins are prevalent across central and western Australia. Several of these basins have proven petroleum systems, with the best discoveries to date being in the Greater McArthur Basin, Northern Territory. Recent exploration and appraisal in the Beetaloo Sub-basin of the Greater McArthur Basin has identified large volumes of gas resources contained within unconventional shale reservoirs. In NWQ, the Isa Superbasin and overlying South Nicholson Basin are related in both age and likely deposition to the Greater McArthur Basin. The thick, extensive shale units of the Isa Superbasin are excellent source rocks, while the Mullera Formation in the South Nicholson Basin also has potential but has not been investigated in detail. There are several potential reservoirs within the Proterozoic section and younger units of the overlying Georgina and Carpentaria basins, including clastic and carbonate types. Exploration in the Isa Superbasin identified an estimated 22.1 trillion cubic feet of prospective resources (Armour Energy 2015) in unconventional shale reservoirs of the Lawn Hill Formation and Riversleigh Siltstone. This paper will discuss the stratigraphy, depositional and structural history of these Proterozoic basins and characterise their source and reservoir units using existing and recently acquired geophysical, geochemical, petrographic and petrophysical datasets. From this, several plays or play concepts will be identified and described to help understand the region’s potential for both conventional and unconventional petroleum resources.

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Troup, Alison, and Sally Edwards. "Old basins, new seismic data – architecture of Proterozoic basins in Northwest Queensland." APPEA Journal 62, no. 2 (May 13, 2022): S502—S507. http://dx.doi.org/10.1071/aj21167.

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As part of the Strategic Resources Exploration Program and to complement surveys acquired under Geoscience Australia’s Exploring for the Future (EFTF) initiative, the Geological Survey of Queensland acquired the Camooweal 2D seismic survey in 2019. This survey was designed to support exploration for hydrocarbons in the Georgina and South Nicholson Basins and Isa Superbasin in Northwest Queensland (NWQ) by providing precompetitive sub-surface data to enable interpretation of basin and basement architecture and to examine structures interpreted in the 2018 North West Queensland SEEBASE Study. The Camooweal 2D seismic survey extends Geoscience Australia’s L210 South Nicholson Seismic Survey into an underexplored region of NWQ. It also ties into and complements the 1994 and 2004 Mount Isa seismic surveys, and the 2019 L212 Barkly Seismic Survey in the Northern Territory. The South Nicholson survey highlighted a significant thickness of sedimentary strata and identified a new depocenter of probable Proterozoic age, now referred to as the Carrara Sub-basin. The Camooweal and Barkly surveys extended the seismic coverage in this region and possibly increase the Carrara Sub-basin’s extent underneath the Georgina Basin. This work will present an interpretation of the basin architecture of the Camooweal 2D seismic in light of the recent drilling at NDI Cararra 1 and tie into interpretation of the Barkly Seismic Survey to provide a regional interpretation of NWQ’s Proterozoic basins in the region.

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George, Bivin G., Jyotiranjan S. Ray, and Sanjeev Kumar. "Geochemistry of carbonate formations of the Chhattisgarh Supergroup, central India: implications for Mesoproterozoic global events." Canadian Journal of Earth Sciences 56, no. 3 (March 2019): 335–46. http://dx.doi.org/10.1139/cjes-2018-0144.

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The Chhattisgarh Supergroup is one of the major Proterozoic marine sedimentary sequences of India. It consists of largely undeformed and unmetamorphosed siliciclastic, volcaniclastic, and carbonate formations deposited in two sub-basins, Hirri and Bharadwar, separated by an Archean greenstone belt. In spite of its apparent importance for Mesoproterozoic oceanic records, very few geochemical studies have been carried in the basin. Here, we present results of our high resolution geochemical and C–O–Sr isotopic studies in two carbonate formations of the supergroup: the Charmuria and the Chandi. We observe elevated δ13C values increasing from 2.6‰ to 3.6‰ in these formations, which is consistent with the globally reported late Mesoproterozoic values. Such consistently positive δ13C values are attributed to increased organic carbon burial in the basin margins during the deposition of these carbonates. Based on the principles of δ13C isotope stratigraphy, we suggest a depositional age between 1.0 and 1.2 Ga for these carbonates which form the upper part of the supergroup. The lowest 87Sr/86Sr ratios obtained from the Charmuria and Chandi formations, 0.70723 and 0.70816, respectively, are more radiogenic than the contemporaneous seawater, suggesting that the Sr isotopic system of the formations are altered. Based on the similarity in the δ13C values, we stratigraphically correlate the carbonate formations of the Raipur Group in both the Hirri and Bharadwar sub-basins. We also present a compilation of available δ13C and 87Sr/86Sr records from all the Proterozoic sedimentary successions of India and compare it with the global datasets. We find that while the Indian basins possess records of the Bitter Springs and Shuram δ13C anomalies, they lack evidence for the other major global events of the Proterozoic.

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Rainbird, R. "Some Advances in the Study of Proterozoic Sedimentary Basins of North America." Precambrian Research 129, no. 3-4 (March 10, 2004): 199–201. http://dx.doi.org/10.1016/j.precamres.2003.10.001.

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SARKAR, A., P. P. CHAKRABORTY, B. MISHRA, M. K. BERA, P. SANYAL, and S. PAUL. "Mesoproterozoic sulphidic ocean, delayed oxygenation and evolution of early life: sulphur isotope clues from Indian Proterozoic basins." Geological Magazine 147, no. 2 (September 9, 2009): 206–18. http://dx.doi.org/10.1017/s0016756809990380.

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AbstractAnalyses of sulphur isotope compositions in sedimentary pyrites from the Vindhyan, Chattisgarh and Cuddapah basins show heavy δ34S (> +25 ‰) values during the Mesoproterozoic. The data provide evidence in support of a hypothesized global Proterozoic sulphidic anoxic ocean where very low concentrations of marine sulphate, bacterially reduced in closed systems, produced δ34S values in pyrites similar to or even heavier than marine sulphate. The extreme environmental conditions induced by these anoxic oceans could have been responsible for the delayed oxygenation of the biosphere and retarded evolution of multicellular life.

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Holk, Gregory J., T. Kurtis Kyser, Don Chipley, Eric E. Hiatt, and Jim Marlatt. "Mobile Pb-isotopes in Proterozoic sedimentary basins as guides for exploration of uranium deposits." Journal of Geochemical Exploration 80, no. 2-3 (September 2003): 297–320. http://dx.doi.org/10.1016/s0375-6742(03)00196-1.

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Whitford, D. J., P. J. Hamilton, and J. Scott. "SEDIMENTARY PROVENANCE STUDIES IN AUSTRALIAN BASINS USING NEODYMIUM MODEL AGES." APPEA Journal 34, no. 1 (1994): 320. http://dx.doi.org/10.1071/aj93029.

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An understanding of the tinting of basin evolution is fundamental to the development of successful play concepts. The Sm-Nd geochronometer can be used to determine quantitatively the `average' age at which segments of continental crust have been extracted from the earth's mantle. Variations in Nd model ages within sedimentary rock sequences indicate changes in sedimentary provenance over time and provide a potential correlation tool.In the Eromanga Basin, there is a distinct lithological contrast between the main reservoir unit, the Jurassic Hutton Sandstone, and the overlying Birkhead Formation. The quartz-rich Hutton Sandstone is characterised by relatively old Nd model ages, generally within the range 1.3–1.5 Ga. In contrast the lithic-rich Birkhead Formation has much younger model ages, generally Neodymium model ages measured in mudstones within the Flag Sandstone from the Harriet Field in the Barrow Sub-basin of the North West Shelf, range from 2.1–2.5 Ga. The old ages are consistent with the sediments being derived from the Archaean shield areas and the younger Proterozoic complexes of Western Australia. Tentative correlations based on model ages between mudstone units from two wells are consistent with correlations based on heavy mineral suites.Neodymium model ages have application to correlation at both regional and local scales within basins. Reliable information can be obtained on both sandstones and mudstones on samples as small 50 g. Potentially they can provide important quantitative information complementary to that derived from more conventional approaches.

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Дисертації з теми "Proterozoic sedimentary basins"

Vallini, Daniela Alessandra. "The formation of authigenic xenotime in Proterozoic sedimentary basins : petrography, age and geochemistry." University of Western Australia. Geology and Geophysics Discipline Group, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0070.

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[Truncated abstract] The realization in 1999 that the authigenic phosphate, xenotime, could be used in geochronological studies to place age constraints on burial events that affected sedimentary basins has opened numerous opportunities for establishing timeframes for sedimentary basin analysis. Since then, the mineral has been used to place new and novel age constraints on diagenesis, metamorphism, and hydrothermal alteration and mineralization events. Whilst these studies were successful, they identified many complexities in xenotime growth and were restricted to specific areas or single basins: they do not convey, demonstrate or explore the immense variety of geological applications in which xenotime may provide unique geochronological constraints. This thesis explores the nature of authigenic xenotime, utilizing studies in three different Proterozoic sedimentary basins: two in Australia, southwestern Australia and the Northern Territory, and the third in the United States of America. The thesis includes a number of discrete studies demonstrating different aspects of xenotime growth, elucidated from detailed petrography, geochronology and geochemistry of authigenic xenotime. An integrated textural, geochemical and geochronological study of authigenic xenotime from the Mt Barren Group, SW Australia, establishes an absolute timescale on some of the many processes involved during the diagenesis of siliciclastic units. ... positions and trends and broadly confirm the chemical discrimination criteria established for an Archaean basin. However, the Proterozoic data are shifted to lower Gd-Dy values and extend beyond the original field outlines, causing more overlap between fields intended to discriminate xenotimes of different origin. The plots were revised to encompass the new data. This study has significantly extended our knowledge of the nature of authigenic xenotime. It was found that xenotime may form in (meta)sediments in response to a large number of post-depositional processes, including early- and latediagenesis, (multiple) basinal hydrothermal events and low-grade metamorphism. A combination of detailed petrography and in situ geochronology provides the best avenue to decipher complex growth histories in xenotime. With further development, it is likely that xenotime geochemistry will also prove diagnostic of origin and can be incorporated into the interpretation of age data. The number of potential applications for xenotime geochronology has been expanded by this study.

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Simplicio, Fábio 1985. "Formação Bandeirinha, região de Diamantina (MG) : um exemplo, no proterozoico, de lençol de areia eólica." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287334.

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Orientador: Giorgio Basilici
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociências
Made available in DSpace on 2018-08-23T12:00:04Z (GMT). No. of bitstreams: 1 Simplicio_Fabio_M.pdf: 8080825 bytes, checksum: fba3debc6ddf60e9930361db9c5c3855 (MD5) Previous issue date: 2013
Resumo: Os lençóis de areia eólica são sistemas deposicionais constituídos em áreas de morfologia plana ou ligeiramente ondulada. As formas de leito predominantes nos lençóis de areia são as marcas onduladas de vento. Tais formas de leito podem ocorrer em comboios ou compondo zibars. Os zibars são formas de leito similares às dunas. Nos zibars não há geração de estratos de queda. Embora muitos estudos reconheçam sistemas de deposição eólica pré-cambrianos, poucos são direcionados aos lençóis de areia eólica. Igualmente negligenciados são os zibars. A Formação Bandeirinha é a unidade inferior do Supergrupo Espinhaço. Depósitos de arenitos vermelhos intercalados a conglomerados intraformacionais compõem esta unidade. Três elementos arquiteturais foram individualizados: zibars, dunas com faces de deslizamento e canais efêmeros. Os depósitos de zibars são arenitos finos a grossos, moderadamente bem selecionados, constituídos por sets de arenitos com laminações planas e paralelas, de geometria tabular ou em cunha. Os sets ocorrem sobrepostos, separados por superfícies truncadas, e constituem cosets. Os depósitos de dunas com faces de deslizamento são arenitos finos a médios, muito bem selecionados, que ocorrem na forma de corpos de geometria lenticular. Os depósitos de canais efêmeros são constituídos por corpos de conglomerados intraformacionais, clasto-suportados, de base côncava, os quais ocorrem em contato erosivo sobre os estratos de arenitos. As superfícies erosivas, de contato entre arenitos e conglomerados, têm amplitude regional. A Formação Bandeirinha é interpretada como uma sucessão sedimentar formada em um lençol de areia eólica dominado por zibars. A alternância entre depósitos de arenitos eólicos e conglomerados revela variações climáticas de ordem regional, onde a deposição eólica (clima seco) era interrompida por deposição subaquosa (clima mais úmido). Neste lençol de areia, o balanço entre entrada e saída de materiais clásticos foi sempre positivo, a construção eólica foi contínua nos períodos mais secos. A estabilização do sistema foi resultado dos processos de cimentação no substrato. A subsidência tectônica foi o principal mecanismo de preservação do sistema eólico
Abstract: The aeolian sand sheets are depositional systems formed in areas with flat or slightly undulating morphology. The predominant bedforms in sand sheets are climbing wind ripples. These bedforms may occur in convoys or composing zibars. The zibars are similar to dunes, but without avalanching faces. Although many studies recognise aeolian Precambrian systems, few works deal with aeolian sand sheets. Equally neglected are the zibars. The Bandeirinha Formation is the lower unit of the Espinhaço Supergroup. Deposits of red sandstones intercalated with intraformational conglomerates compose this unit. Three architectural elements are recognised: zibars, dunes with slip faces and ephemeral channels. Deposits of zibars are fine to coarse grained sandstones, moderately well sorted, and composed by sets of planar-parallel laminations sandstones, in tabular geometry. The sets are superimposed and occur separated by truncated surfaces that constitute cosets. The dunes with slip face are fine to medium grained, very well sorted, and occur as lenticular bodies. The ephemeral channel deposits consist of intraformational conglomerates, clast-supported, with concave erosive basal surface on the sandstone strata. The erosive surfaces of the conglomerates seem to have a regional extension. The Bandeirinha Formation is interpreted as an aeolian sand sheet dominated by zibars. The transition between aeolian sandstones and conglomerates reveals climate variations of regional range, where aeolian deposition, which corresponds to dry climate phase, was interrupted by subaqueous deposition, in more humid climate. During the sand sheet deposition, the balance between input and output of clastic materials was always positive, the aeolian construction was continuous. The stabilization of the aeolian system was result of cementation processes of shallow depth. The tectonic subsidence was the main mechanism of preservation of the aeolian system
Mestrado
Geologia e Recursos Naturais
Mestre em Geociências

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Delpomdor, Franck. "Sedimentology, geochemistry and depositional environments of the 1175-570 Ma carbonate series, Sankuru-Mbuji-Mayi-Lomami-Lovoy and Bas-Congo basins, Democratic Republic of Congo: new insights into late Mesoproterozoic and Neoproterozoic glacially- and/or tectonically-influenced sedimentary systems in equatorial Africa." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209486.

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The one of the most important Eras of the Earth history, i.e. Neoproterozoic (1000-542 Ma),

was an enigmatic period characterized by the development of the first stable long-lived ~1.1-

0.9 Ga Rodinia and 550-500 Ma Gondwana supercontinents, global-scale orogenic belts,

extreme climatic changes (cf. Snowball Earth Hypothesis), the development of microbial

organisms facilitating the oxidizing atmosphere and explosion of eukaryotic forms toward the

first animals in the terminal Proterozoic. This thesis presents a multidisciplinary study of two

Neoproterozoic basins, i.e. Bas-Congo and Sankuru-Mbuji-Mayi-Lomami-Lovoy, in and around the Congo Craton including sedimentology, geochemistry, diagenesis, chemostratigraphy and radiometric dating of carbonate deposits themselves.

The Mbuji-Mayi Supergroup sequence deposited in a SE-NW trending 1500 m-thick siliciclastic-carbonate intracratonic failed-rift basin, extends from the northern Katanga Province towards the centre of the Congo River Basin. The 1000 m-thick carbonate succession is related to the evolution of a marine ramp submitted to evaporation, with ‘deep’ shaly basinal and low-energy carbonate outer-ramp environments, marine biohermal midramp (MF6) and ‘very shallow’ restricted tide-dominated lagoonal inner-ramp (MF7-MF9) settings overlain by lacustrine (MF10) and sabkha (MF11) environments, periodically

submitted to a river water source with a possible freshwater-influence. The sequence stratigraphy shows that the sedimentation is cyclic in the inner ramp with plurimetric ‘thin’ peritidal cycles (± 4 m on average) recording a relative sea level of a maximum of 4 m, with fluctuations in the range of 1-4 m. The outer/mid ramp subtidal facies are also cyclic with ‘thick’ subtidal cycles characterized by an average thickness of ± 17 m, with a probable sealevel

fluctuations around 10 to 20 m. The geochemistry approach, including isotopic and major/trace and REE+Y data, allows to infer the nature of the dolomitization processes operating in each carbonate subgroup, i.e dolomitization may be attributed to evaporative reflux of groundwater or to mixing zones of freshwater lenses. The latest alteration processes occured during the uplift of the SMLL Basin. New ages, including LA-ICP-MS U-Pb laser ablation data on detrital zircon grains retrieved in the lower arenaceous-pelitic sequence (BI group), combined with carbon and strontium isotopic analyses, yielded a new depositional time frame of the Mbuji-Mayi Supergroup between 1176 and 800 Ma reinforcing the formerly suggested correlation with the Roan Group in the Katanga Province.

In the Democratic Republic of Congo, the Sturtian-Marinoan interglacial period was previously related to pre-glacial carbonate-dominated shallow marine sedimentation of the Haut-Shiloango Subgroup with stromatolitic reefs at the transition between greenhouse (warm) and icehouse (cold) climate periods, commonly marked by worldwide glacigenic diamictites and cap carbonates. This thesis highlights that these deposists record as a deepening-upward evolution from storm-influenced facies in mid- and outer-ramps to deepwater environments, with emplacement of mass flow deposits in toe-of-slope settings controlled by synsedimentary faults. In absence of diagnostic glacial features, the marinoan Upper Diamictite Formation is interpreted as a continuous sediment gravity flow deposition along carbonate platform-margin slopes, which occurred along tectonically active continental margins locally influenced by altitude glaciers, developed after a rift–drift transition. The maximum depth of the deepening-upward facies is observed in the C2a member. The

shallowing-upward facies exibit a return of distally calcareous tempestites and semi-restricted to restricted peritidal carbonates associated with shallow lagoonal subtidal and intertidal zones submitted to detrital fluxes in the upper C2b to C3b members.

The geochemistry highlights (i) the existence of a δ13C-depth gradient of shallow-water and deep-water carbonates; (ii) the carbonate systems were deposited in oxic to suboxic conditions; and (iii) all samples have uniform flat non-marine shale-normalized REE+Y distributions reflecting

continental detrital inputs in nearshore environments, or that the nearshore sediments were

reworked from ’shallow’ inner to mid-ramp settings in deep-water slope and outer-ramp

environments, during the rift-drift transition in the basin. The pre-, syn- and post-glacial

carbonate systems could record a distally short-lived regional synrift freshwater-influenced

submarine fan derived from nearshore sediments, including gravity flow structures, which are

attributed to regional tectonic processes due to a sudden deepening of the basin caused by

differential tilting and uplifting of blocks, related to the 750-670 Ma oceanic spreading of the

central-southern Macaúbas Basin.

Combining sedimentology, isotopes and trace elemental geochemistry, the thesis highlights

that the δ13C variations in the Neoproterozoic carbonates are complex to interpret, and can be

related to: (i) the existence of a δ13C-depth gradient; (ii) the exchange between isotopically

light carbon in meteoric waters and carbonate during lithification and early diagenesis; and

(iii) isotopic perturbations due to regional metamorphism. Considering the possible englaciation of the Earth (Snowball Earth hypothesis), the Mbuji-Mayi Supergroup and West

Congolian Group seem reflected the intimate relationship between glaciations and tectonic

activity during the break-up of the Rodinia supercontinent, followed by the rift–drift

transition, and finally the pre-orogenic period on the passive continental margin.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Книги з теми "Proterozoic sedimentary basins"

C, Goff J., Williams B. P. J, Geological Society of London. Petroleum Specialist Group., and Geological Society of London. Hydrogeological Specialist Group., eds. Fluid flow in sedimentary basins and aquifers. Oxford, OX: Published for the Geological Society by Blackwell Scientific Publications, 1987.

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Tim, Pharaoh, Beckinsale R. D, Rickard David T. 1943-, Geological Society of London, International Lithosphere Program, and International Geological Correlation Programme. Project 217, Proterozoic Geochemistry., eds. Geochemistry and mineralization of Proterozoic volcanic suites. Oxford: Published for the Geological Society by Blackwell Scientific Publications, 1987.

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Частини книг з теми "Proterozoic sedimentary basins"

Chakraborty, Partha Pratim, S. K. Tandon, Sagnik Basu Roy, Subhojit Saha, and Pritam P. Paul. "Proterozoic Sedimentary Basins of India." In Geodynamics of the Indian Plate, 145–77. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-15989-4_4.

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Das, Supriyo Kumar, and Neal Gupta. "Early Life from the Proterozoic Sedimentary Basins of India." In Geodynamics of the Indian Plate, 195–212. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-15989-4_6.

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Nicholson, P. G. "A Basin Reappraisal of the Proterozoic Torridon Group, Northwest Scotland." In Tectonic Controls and Signatures in Sedimentary Successions, 183–202. Oxford, UK: Blackwell Publishing Ltd., 2009. http://dx.doi.org/10.1002/9781444304053.ch11.

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Lindsay, John F., and John D. Gorter. "Clastic Petroleum Reservoirs of the Late Proterozoic and Early Paleozoic Amadeus Basin, Central Australia." In Frontiers in Sedimentary Geology, 39–74. New York, NY: Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4757-0160-9_3.

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Grotzinger, John P., and David S. McCormick. "Flexure of the Early Proterozoic Lithosphere and the Evolution of Kilohigok Basin (1.9 Ga), Northwest Canadian Shield." In Frontiers in Sedimentary Geology, 405–30. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4612-3788-4_20.

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Ojakangas, Richard W. "Glaciation: An Uncommon “Mega-Event” as a Key to Intracontinental and Intercontinental Correlation of Early Proterozoic Basin Fill, North American and Baltic Cratons." In Frontiers in Sedimentary Geology, 431–44. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4612-3788-4_21.

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Eriksson, K. A., E. L. Simpson, and M. J. Jackson. "Stratigraphical Evolution of a Proterozoic Syn-Rift to Post-Rift Basin: Constraints on the Nature of Lithospheric Extension in the Mount Isa Inlier, Australia." In Tectonic Controls and Signatures in Sedimentary Successions, 203–21. Oxford, UK: Blackwell Publishing Ltd., 2009. http://dx.doi.org/10.1002/9781444304053.ch12.

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Williams, Neil. "Light-Element Stable Isotope Studies of the Clastic-Dominated Lead–Zinc Mineral Systems of Northern Australia and the North American Cordillera: Implications for Ore Genesis and Exploration." In Isotopes in Economic Geology, Metallogenesis and Exploration, 329–72. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-27897-6_11.

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AbstractClastic-dominated lead–zinc (CD Pb–Zn) deposits are an important source of the world’s Pb and Zn supply. Their genesis is contentious due to uncertainties regarding the time of ore formation relative to the deposition of the fine-grained carbonaceous strata that host CD Pb–Zn mineralization. Sulfur-isotopic studies are playing an important role in determining if ore minerals precipitated when hydrothermal fluids exhaled into the water column from which the host strata were being deposited, or when hydrothermal fluids entered the host strata during diagenesis or even later after lithification. Older conventional S-isotopic studies, based on analyses of bulk mineral-separate samples obtained by either physical or chemical separation methods, provided data that has been widely used to support a syngenetic-exhalative origin for CD Pb–Zn mineralization. However, with the advent in the late 1980’s of in situ S-isotopic studies using micro-analytical methods, it soon became apparent that detailed S-isotopic variations of genetic importance are blurred in conventional analytical data sets because of averaging during sample preparation. Clastic-dominated Pb–Zn mineralization in the North Australian Proterozoic metallogenic province and the North American Paleozoic Cordilleran province has been the subject of many stable isotope studies based on both bulk and in situ analytical methods. Together with detailed mineral texture observations, the studies have revealed a similar sulfide mineral paragenesis in both provinces. The earliest sulfide phase in the paragenesis is fine-grained pyrite that sometimes has a framboidal texture. This pyrite typically has a wide range of δ34S values that are more than 15‰ lower than the value of coeval seawater sulfate. These features are typical of, and very strong evidence for, pyrite formation by bacterial sulfate reduction (BSR) either syngenetically in an anoxic water column or during early diagenesis in anoxic muds. The formation of this early pyrite is followed by one or more later generations of pyrite that often occur as overgrowths around the early pyrite generation. The later pyrite generations have δ34S values that are much higher than the early pyrite, often approaching the value of coeval seawater sulfate. Later pyrite formation has been variously attributed to BSR in a more restricted diagenetic environment, to sulfate driven-anaerobic oxidation of methane (SD-AOM) and to abiotic thermal sulfate reduction (TSR), with all three mechanisms again involving coeval seawater sulfate. The main sulfide ore minerals, galena and sphalerite, either overlap with or postdate later pyrite generations and are most often attributed to TSR of seawater sulfate. However, in comparison with pyrite, there is a dearth of in situ δ34S data for galena and sphalerite that needs to be rectified to better understand ore forming processes. Importantly, the available data do not support a simple sedimentary-exhalative model for the formation of all but part of one of the Northern American and Australian deposits. The exception is the giant Red Dog deposit group in Alaska where various lines of evidence, including stable isotopic data, indicate that ore formation was protracted, ranging from early syn-sedimentary to early diagenetic sulfide formation through to late sulfide deposition in veins and breccias. The Red Dog deposits are the only example with early sphalerite with extremely low negative δ34S values typical of a BSR-driven precipitation mechanism. By contrast, later stages of pyrite, sphalerite and galena have higher positive δ34S values indicative of a TSR-driven precipitation mechanism. In CD Pb–Zn deposits in carbonate-bearing strata, carbon and oxygen isotope studies of the carbonates provide evidence that the dominant carbonate species in the ore-forming hydrothermal fluids was H2CO3, and that the fluids were initially warm (≥ 150 °C) and neutral to acid. The δ18O values of the hydrothermal fluids are ≥ 6‰, suggesting these fluids were basinal fluids that evolved through exchange with the basinal sedimentary rocks. Known CD Pb–Zn deposits all occur at or near current land surfaces and their discovery involved traditional prospecting, geophysical and geochemical exploration techniques. Light stable isotopes are unlikely to play a significant role in the future search for new CD Pb–Zn deposits deep beneath current land surfaces, but are likely to prove useful in identifying ore-forming hydrothermal fluid pathways in buried CD Pb–Zn systems and be a vector to new mineralization.

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Riggs, Nancy, Brian McConnell, and John Graham. "Sedimentary provenance of Silurian basins in western Ireland during Iapetus closure." In New Developments in the Appalachian-Caledonian- Variscan Orogen. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2554(16).

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ABSTRACT Three Silurian basin fills, the Llandovery–Wenlock Croagh Patrick and Killary Harbour–Joyce Country successions and the Ludlow–Pridoli Louisburgh–Clare Island succession, overstep the tectonic contacts between elements of the Grampian (Taconic) accretionary history of the Caledonian-Appalachian orogeny in western Ireland. New U-Pb detrital zircon data from lower strata of these Silurian rocks provide insight into basin evolution and paleogeography. The shallow-marine Croagh Patrick succession unconformably overlies the Clew Bay Complex and the northern part of the Ordovician South Mayo Trough. Two samples have zircon populations dominated by Proterozoic grains typical of the Laurentian margin, with few younger grains. Up to 13% of the grains form a cluster at ca. 950–800 Ma, which is younger than known Grenville magmatism on the local Laurentian margin and older than known magmatism from Iapetan rifting; these may be recycled grains from Dalradian strata, derived from distal Tonian intrusions. The Killary Harbour–Joyce Country succession overlies the structural contact between the Lough Nafooey arc and the Connemara Dalradian block and records a transgressive-regressive cycle. Four samples of the Lough Mask Formation show contrasting age spectra. Two samples from east of the Maam Valley fault zone, one each from above Dalradian and Nafooey arc basement, are dominated by Proterozoic grains with ages typical of a Laurentian or Dalradian source, likely in north Mayo. One sample also includes 8% Silurian grains. Two samples from west of the fault overlie Dalradian basement and are dominated by Ordovician grains. Circa 450 Ma ages are younger than any preserved Ordovician rocks in the region and are inferred to represent poorly preserved arc fragments that are exposed in northeastern North America. Cambrian to late Neoproterozoic grains in association with young Ordovician ages suggest derivation from a peri-Gondwanan source in the late stages of Iapetus closure. The Louisburgh–Clare Island succession comprises terrestrial red beds. It unconformably overlies the Clew Bay Complex on Clare Island and is faulted against the Croagh Patrick succession on the mainland. The Strake Banded Formation yielded an age spectrum dominated by Proterozoic Laurentian as well as Ordovician–Silurian ages. Although the basin formed during strike-slip deformation along the Laurentian margin in Ireland and Scotland, sediment provenance is consistent with local Dalradian sources and contemporaneous volcanism. Our results support ideas that Ganderian continental fragments became part of Laurentia prior to the full closure of the Iapetus Ocean.

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Large, Ross R., Stuart W. Bull, Peter J. McGoldrick, Steve Walters, Geoff M. Derrick, and Graham R. Carr. "Stratiform and Strata-Bound Zn-Pb-Ag Deposits in Proterozoic Sedimentary Basins, Northern Australia." In One Hundredth Anniversary Volume. Society of Economic Geologists, 2005. http://dx.doi.org/10.5382/av100.28.

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Тези доповідей конференцій з теми "Proterozoic sedimentary basins"

K. Bazhenova, O., T. K. Bazhenova, and N. P. Fadeeva. "Upper Proterozoic Sedimentary Basins of Ancient Russian Platforms." In 68th EAGE Conference and Exhibition incorporating SPE EUROPEC 2006. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609.201402245.

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Jones, James V. "PROTEROZOIC SEDIMENTARY BASINS AS SENSITIVE RECORDERS OF THE GROWTH, CRATONIZATION, AND PLATE INTERACTIONS OF WESTERN NORTH AMERICA." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-332956.

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Udegova, V. V., and Yu F. Filippov. "POTENTIALLY OIL AND GAS COMPLEXES OF THE CIS-YENISEI SEDIMENTARY BASIN IN THE SOUTHEAST OF WESTERN SIBERIA." In All-Russian Youth Scientific Conference with the Participation of Foreign Scientists Trofimuk Readings - 2021. Novosibirsk State University, 2021. http://dx.doi.org/10.25205/978-5-4437-1251-2-48-51.

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This article discusses the features of the potentially oil and gas bearing Upper Proterozoic-Cambrian complexes of the Cis-Yenisei sedimentary basin in the southeastern part of the West Siberian plate. As a result of the analysis carried out using parametric wells and a seismic section of the CDP, the main potential oil and gas bearing complexes were identified and characterized, the patterns of their distribution in the sedimentary section of the basin were revealed.

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Yoshiya, Kazumi, Yusuke Sawaki, Manabu Nishizawa, Yohei Matsui, Tsuyoshi Komiya, and Shigenori Maruyama. "NITROGEN/CARBON ISOTOPE RATIOS FROM THE EARLY TO MIDDLE PROTEROZOIC SEDIMENTARY ROCKS, MCARTHUR BASIN, NORTHERN AUSTRALIA." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-281347.

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Звіти організацій з теми "Proterozoic sedimentary basins"

Bingham-Koslowski, N., L. T. Dafoe, M R St-Onge, E. C. Turner, J. W. Haggart, U. Gregersen, C. E. Keen, A. L. Bent, and J. C. Harrison. Introduction and summary. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321823.

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The papers contained in this bulletin provide a comprehensive summary and updated understanding of the onshore geology and evolution of Baffin Island, the Labrador-Baffin Seaway, and surrounding onshore regions. This introductory paper summarizes and links the geological and tectonic events that took place to develop the craton and subsequent Proterozoic to Cenozoic sedimentary basins. Specifically, the Precambrian and Paleozoic geology of Baffin Island and localized occurrences underlying the adjacent Labrador-Baffin Seaway, the Mesozoic to Cenozoic stratigraphy and rift history that records the opening and evolution of the Labrador-Baffin Seaway, the seismicity of the region, as well as both the mineral (Baffin Island) and hydrocarbon (onshore and offshore) resource potential are discussed.

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