Results 1 to 10 of about 2,276 (161)

Comparisons of the Paleo-Mesoproterozoic large igneous provinces and black shales in the North China and North Australian cratons [PDF]

open access: yesFundamental Research, 2022
Comparisons of large igneous provinces (LIPs) and black shales from different cratons can provide important constraints on Precambrian paleogeographic reconstructions and a better understanding of the environmental effects of large-scale volcanic events.
Shuan-Hong Zhang   +8 more
doaj   +2 more sources

Organic vs inorganic contribution to the chemistry of cretaceous black shales in the Mamfe basin, SW Cameroon. Evidence from geochemistry and statistical analysis [PDF]

open access: yesHeliyon, 2023
The present study focused on evaluating the contribution of both organic and inorganic component to the chemistry of Cretaceous black shales in the Mamfe basin, Sw Cameroon by performing inductively couple plasma spectrometry analyses with the data ...
Bisse Salomon Betrant   +9 more
doaj   +2 more sources

Paleoclimate characteristics of source area weathering and metallogenic implication of cretaceous black shales in the Mamfe basin, (SW Cameroon): Evidence from lithogeochemistry [PDF]

open access: yesHeliyon, 2023
Black shales are highly enriched in essential elements containing critical information on metallic richness and paleoclimatic imprints during deposition.
Bokanda Ekoko Eric   +5 more
doaj   +2 more sources

Potassium enrichment mechanism and controlling factors in Cambrian black shale from eastern Guizhou, China [PDF]

open access: yesScientific Reports
Potassium is a critical mineral resource for global agricultural security. Besides soluble potash salts, insoluble potassium resources hosted in black shale series represent an important alternative potash mineral resource. Extensively developed Cambrian
Junwei Fu   +9 more
doaj   +2 more sources

The distribution, hydrocarbon potential, and development of the Lower Cretaceous black shales in coastal southeastern China

open access: yesJournal of Palaeogeography, 2017
Lower Cretaceous black shales in coastal southeastern China are of significance to the geological study of the Tethys and Pacific realms and to hydrocarbon exploration of southeastern China and East China Sea.
Guang Hu   +8 more
doaj   +3 more sources

A non-zircon Hf isotope record in Archean black shales from the Pilbara craton confirms changing crustal dynamics ca. 3 Ga ago [PDF]

open access: yesScientific Reports, 2018
Plate tectonics and associated subduction are unique to the Earth. Studies of Archean rocks show significant changes in composition and structural style around 3.0 to 2.5 Ga that are related to changing tectonic regime, possibly associated with the onset
Yona Nebel-Jacobsen   +3 more
doaj   +2 more sources

Tectonic, foreland-basin origins of Upper Ordovician black gas shales in the Appalachian Basin of eastern United States [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Black gas shales are major parts of many foreland-basin sequences and comprise important components of unconformity-bound tectophase cycles, which reflect sedimentary/stratigraphic, flexural responses to deformational loading and relaxation in an orogen.
Frank R. Ettensohn, Gustavo Martins
doaj   +1 more source

Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Tremadocian highly metalliferous black shales and associated grey shales from the Aseri PH012B drill core (NE Estonia) in the innermost part of the Baltic Palaeobasin were targeted to record their nitrogen and organic carbon isotope variance combined ...
Mawo Ndiaye   +4 more
doaj   +1 more source

Maceral Control on the Hydrocarbon Generation Potential of Lacustrine Shales: A Case Study of the Chang 7 Member of the Triassic Yanchang Formation, Ordos Basin, North China

open access: yesEnergies, 2023
Organic matter (OM) type critically controls the hydrocarbon generation potential and organic pore development in black shales. However, maceral variation in lacustrine shales and its control on hydrocarbon generation potential and organic pore ...
Bei Liu, Juan Teng, Maria Mastalerz
doaj   +1 more source

Phanerozoic environments of black shale deposition and the Wilson Cycle [PDF]

open access: yesSolid Earth, 2012
The spatial and temporal distribution of black shales is related to the development of environments in which they accumulate and to a propitious combination of environmental variables.
J. Trabucho-Alexandre   +2 more
doaj   +1 more source

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