Chapter 8: The World-Class Gold Deposits in the Geita Greenstone Belt, Northwestern Tanzania
Published:January 01, 2020
P.H.G.M. Dirks, I. V. Sanislav, M. R. van Ryt, J.-M. Huizenga, T. G. Blenkinsop, S. L. Kolling, S. D. Kwelwa, G. Mwazembe, 2020. "Chapter 8: The World-Class Gold Deposits in the Geita Greenstone Belt, Northwestern Tanzania", 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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The Geita mine is operated by AngloGold Ashanti and currently comprises four gold deposits mined as open pits and underground operations in the Geita greenstone belt, Tanzania. The mine produces ~0.5 Moz of gold a year and has produced ~8.3 Moz since 2000, with current resources estimated at ~6.5 Moz, using a lower cut-off of 0.5 g/t.
The geologic history of the Geita greenstone belt involved three tectonic stages: (I) early (2820–2700 Ma) extension (D1) and formation of the greenstone sequence in an oceanic plateau environment; (II) shortening of the greenstone sequence (2700–2660 Ma) involving ductile folding...