Black shales
The geochemistry of metalliferous black shales : understanding primary enrichments, metamorphic processes, and the role of metal rich black shales in archiving earth evolution
... Turisalu shales, has added to the depositional models proposed by others ...the black shales of the Turisalu Formation represents a large-scale transgression where the cross bed sets in the Upper ...
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Diagenetic Evolution of Mudstones: Black Shales to Laminated Limestones, an Example from the Lower Jurassic of SW Britain
... of black shales to laminated limestones showed more primary carbonate in black shales toward more diagenetic carbonate in the laminated limestones, which was comparable to the diagenetic ...
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Pyrite trace element geochemistry of black shales of the “Boring Billion” period (1800 800 Ma) : implications for evolution of the atmospheric oxygen and complex life
... carbonaceous shales and dolostones undertaken by Lambert and Scott (1973) and Corbett et ...in shales in near vicinity to a SEDEX style ore deposit. Also, the shales are more pyritic and rich in ...
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Paleomagnetism and Rock Magnetism of "SEDEX" Zn-Pb-Cu Ores in Black Shales in Australia and Yukon and of Fluorite Veins in Granite in Newfoundland.
... in Black Shales in Australia and Yukon and of Fluorite Veins in in Black Shales in Australia and Yukon and of Fluorite Veins in Granite in ...
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Foraminiferal evidence for inner neritic deposition of Lower Cretaceous (Upper Aptian) radiolarian-rich black shales on the Western Australian margin
... ABSTRACT – Diverse foraminifera, Lingula-like brachiopods and the geological setting indicate that Aptian radiolarian-rich black shales forming the Windalia Radiolarite were deposited at water depths ...
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Freshwater discharge controlled deposition of Cenomanian–Turonian black shales on the NW European epicontinental shelf (Wunstorf, northern Germany)
... Despite differences in the preservation of organic matter throughout the OAE2 interval at Wunstorf, the general trend in reconstructed SSTs, including the cooling phase associ- ated with the Plenus Cold Event, is ...
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Geochemistry of Phanerozoic carbonaceous black shales, sandstones and cherts in Malaysia : insights into gold source rock potential
... 1 black shales have a Th/Sc ratio that ranges from ...The shales contain framboidal pyrite commonly less than 10 µm implying deposition under anoxic to euxinic ...
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Experimental Investigation of Mechanical Properties of Black Shales after CO2-Water-Rock Interaction
... marine black shale (including Cambrian Niutitang Formation and Lower Silurian Longmaxi Formation) in these areas is characterized as having high thickness, suitable burial depth and effective fracture development ...
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Molybdenum record from black shales indicates oscillating atmospheric oxygen levels in the early Paleoproterozoic
... Asael, D, Rouxel, O, Poulton, SW orcid.org/0000-0001-7621-189X et al. (2 more authors) (2018) Molybdenum record from black shales indicates oscillating atmospheric oxygen levels in the early ...
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Geochemical Method Of Exploration For Hidden Complex Rare Metal Deposits Of Black-Shale Formations (Illustrated By Black Shales Of Western Uzbekistan)
... the black shale stratum of the folded base of the platform, which are mainly determined by the dynamics of infiltrated fractured underground oxygen-containing waters and the depth of their penetration from the ...
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Analysis of mass dependent and mass independent selenium isotope variability in black shales
... SRM-3149) values of 0.22 0.15 for SCo-1, and +0.25 0.17 for SGR-1b. Further, we present a new method of measuring Se isotopes by desolvation nebulisation. Se sensitivity is enhanced by a factor of 100 – 200 times by ...
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Copper and its isotopes in organic-rich sediments: from the modern Peru Margin to Archean shales
... In principle, the heavier Cu in the ancient samples overall, and the heavier Cu in the OPF than suggested by the interpretation of those from the Peru Margin could have three explanations: (a) a different—variably ...
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Applicability of Static Supercritical Carbon Dioxide Extraction in Biogeochemical Characterization of Oil Shales
... in Lower Paleozoic belong to the most ancient ones in the world. The source material of both kerogens is of marine origin. Kukersite is characterised by an extremely low bitumoid content arising from its allochthonous ...
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Wenlock (Silurian) graptolitic shales from the Kocaeli Peninsula (Derince–Izmit), NWTurkey
... of black shales and clayey limestones; and (c) siltstones and sandy limestones ...by black graptolitic shales with limestone in- terbeds, crops out in the Safranbolu area ...
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Nano pore structure characterization of shales using gas adsorption and mercury intrusion techniques
... gas shales have very low porosity and low permeability (in nano-darcy range), and shale matrix possesses ruleless pore structure and a wide pore size distribution with a significant pore volume in the nano-pore ...
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Geochemical Discriminant for Provenance Characterization and Palaeogeography of Shales from Dahomey Embayment, Southwestern Nigeria
... or shales are often analyzed for their geochemical attributes with the as- sumption that they match closely average composition of the upper continental crust ...
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Palaeosalinity Studies on Some Precambrian Shales of the Bonai-Keonjhar Belt, Orissa-A Preliminary Appraisal
... In shales and very argillaceous limestones rich in illite, the amount of tourmaline relative to illite is very small and can be ignored ...it is not even necessary to remove the coarse-s[r] ...
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Smaller Benthonic Foraminifera from the Gahodleh Shales (Late Jurassic) of Somalia, and their Stratigraphic Significance
... Reidentifications of some of the smaller benthonic foraminifera identified by MacFadyen (1935) from the Gahodleh Shales of Somalia enable a refinement of the stratigrap[r] ...
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The Boondocks, Black History, and Black Lives Matter: Or, Why Black Popular Culture Matters for Black Millennials
... of Black Millennials, Huey narrates the people’s subsequent ...to Black America for the network he ...angry Black Americans at the White House gates ready to ...
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Black on Black Crime
... In the District of Columbia , during 1973 and 1974, and in Atlanta and Miami during 1974 , the frequency for Black male homicidal vic- tims between ages 20 and 29 exceeded all other age [r] ...
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