Trace elements geochemistry, total organic carbon, palaeosalinity, and hydrothermal characteristics of the Cretaceous black shale in the Mamfe Basin (West Africa)

Autor: Bokanda Ekoko Eric, Philip Fralick, Bisse Salomon Betrant, Ashukem Ethel Nkongho, Belinga Belinga Cedric, Bokanda Frankline Besonge, Ligbwah Victor Wotanie, Chin Thiery Berinyuy, Ekomane Emile
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Solid Earth Sciences, Vol 7, Iss 3, Pp 237-246 (2022)
Druh dokumentu: article
ISSN: 2451-912X
DOI: 10.1016/j.sesci.2022.07.001
Popis: The shales of the Mamfe basin were geochemically analyzed to determine their paleosalinity and hydrothermal characteristics which existed at the time of their deposition. Elemental ratios such as boron/gallium (B/Ga), strontium/barium (Sr/Ba), and total sulphur/total organic carbon (S/TOC) and TOC/S were applied for paleosalinity reconstruction. The shales of the Mamfe basin show B/Ga is 6 the values of the elemental ratio show that the Mamfe shales were deposited in a freshwater environment. For hydrothermal activities ratio, Sc/Cr was used and Binary diagrams TOC vs P and Co/Zn vs TOC were constructed to discriminate between normal water, mixed and hydrothermal influence. The Sc/Cr ratio was greater than 0.14 indicating that the shales in the Mamfe basin were deposited in a normal water environment with no influence from hydrothermal processes. The binary discriminant diagram of TOC vs P and Co/Zn vs TOC shows that all the shales were not influenced by any hydrothermal processes during the time of their deposition.
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