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Economic Geology; May 1941; v. 36; no. 2; p. 306-323
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A microscopic study of some ores of the Lupa gold field, Tanganyika Territory, East Africa

David Gallagher

The ores contain chalcopyrite with intergrowths of cubanite indicating high temperature deposition, and abundant magnetite later than the sulfides. This is attributed to sulfur deficiency of the ore-forming solutions and the ferrous nature of the environment. The surprising lack of oxidation and supergene processes is attributed to physical impermeability, aided in part by the peculiar composition of the ground water.

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P. G. COOMER and D. K. ROBERTSON
A lead isotope study of Archaean mineralized areas in Tanzania
Journal of the Geological Society, October 1, 1974; 130(5): 449 - 460.
[Abstract] [PDF]


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