Chapter 7: Paleoproterozoic Gold Deposits of the Loulo District, Western Mali
Published:January 01, 2020
Andrew Allibone, David Lawrence, John Scott, Mark Fanning, James Lambert-Smith, Paul Stenhouse, Reinet Harbidge, Carlos Vargas, Rose Turnbull, Joel Holliday, 2020. "Chapter 7: Paleoproterozoic Gold Deposits of the Loulo District, Western Mali", 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 (Rhyacian) gold deposits of the Loulo district in western Mali contain >17 million ounces (Moz) Au and form part of the second most highly endowed region within West Africa. The deposits are located within siliciclastic, marble, and evaporitic rocks of the ca. 2110 Ma greenschist facies Kofi series, which were folded and inverted between ca. 2100 and 2070 Ma, prior to gold mineralization. Deposits at Yalea and Gounkoto are located along discontinuous, low-displacement, albite- and carbonate-altered shear zones, whereas Gara is confined to a tourmaline-altered quartz sandstone unit. Lodes typically plunge gently to moderately, reflecting the attitude of...