Chapter 34: The Paleoproterozoic (Rhyacian) Gold Deposits of West Africa
Published:January 01, 2020
Nicolas Thébaud, Andrew Allibone, Quentin Masurel, Aurélien Eglinger, James Davis, Anne-Sylvie André-Mayer, John Miller, Morou François Ouedrago, Mark Jessell, 2020. "Chapter 34: The Paleoproterozoic (Rhyacian) Gold Deposits of West Africa", Geology of the World’s Major Gold Deposits and Provinces, Richard H. Sillitoe, Richard J. Goldfarb, François Robert, Stuart F. Simmons
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Paleoproterozoic terranes of the Man-Leo Shield in the southern part of the West African craton host one of the world’s largest gold provinces with an overall endowment >10,000 metric tons (t). Although gold deposition commenced by ca. 2170 Ma, most deposits formed later, either during the inversion and metamorphism of intraorogenic sedimentary basins between ca. 2110 and 2095 Ma, or during later transcurrent deformation and associated widespread high K plutonism following docking of Archean and Paleoproterozoic domains within the craton at ca. 2095 Ma. Deposits formed between ca. 2110 and 2095 Ma include those with free gold in quartz...