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Browsing by Subject "Geochemistry"

Browsing by Subject "Geochemistry"

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  • Age of the oldest known Homo sapiens from eastern Africa 
    Vidal, Celine M; Lane, Christine S; Asrat, Asfawossen; Barfod, Dan N; Mark, Darren F; Tomlinson, Emma L; Tadesse, Amdemichael Zafu; Yirgu, Gezahegn; Deino, Alan; Hutchison, William; Mounier, Aurélien; Oppenheimer, Clive (Springer Nature Limited, 2022-01-12)
    Efforts to date the oldest modern human fossils in eastern Africa, from Omo-Kibish1,2,3 and Herto4,5 in Ethiopia, have drawn on a variety of chronometric evidence, including 40Ar/39Ar ages of stratigraphically associated ...
  • Archean boninite-like mafic-ultramafic rocks from the Lechana layered intrusion, Motloutse complex, Botswana 
    Mokatse, Thuto (Botswana International University of Science and Technology, 2017-12)
    Mafic to ultramafic rocks occurring in the Lechana area forms part of the Archean high-grade Motloutse Complex terrane in eastern Botswana. Their occurrence as inclusions (displaced fragments) within ~2.6 Ga tonalite ...
  • Mineralogy and geochemistry of the Ngaoundaba Crater Lake sediments, northern Cameroon: implications for provenance and trace metals status 
    Bessa, Armel Zacharie Ekoa; Armstrong-Altrin, John S; Fuh, Gentry Calistus; Bineli-Betsi, Thierry Olivier; Kelepile, Tebogo; Ndjigui, Paul-Desire (Springer Link, 2021-03-18)
    This study was conducted on the Ngaoundaba Crater Lake sediments to infer provenance, weathering conditions, organic matter accumulation, and trace metal concentrations. Ngaoundaba Lake sediments were collected using a ...
  • Orbital controls on eastern African hydroclimate in the Pleistocene 
    Lupien, Rachel L; Russell, James M; Pearson, Emma J; Castañeda, Isla S; Asrat, Asfawossen; Foerster, Verena; Lamb, Henry F; Roberts, Helen M; Schäbitz, Frank; Trauth, Martin H; Beck, Catherine C; Feibel, Craig S; Cohen, Andrew S (Springer Nature Limited, 2022-02-24)
    Understanding eastern African paleoclimate is critical for contextualizing early human evolution, adaptation, and dispersal, yet Pleistocene climate of this region and its governing mechanisms remain poorly understood due ...

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