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The Geology and Mineralization of the Mangani Mine, Sumatra Indonesia
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Citation (Style = APA)
Turvey DJ, ; Heesteman LJL, (1987). The Geology and Mineralization of the Mangani Mine, Sumatra Indonesia.
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Turvey DJ, ; Heesteman LJL, (1987). The Geology and Mineralization of the Mangani Mine, Sumatra Indonesia.
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SpreadSheed (CSV)
Organization: The Australasian Institute of Mining and Metallurgy
Pages: 5
Publication Date:
Jan 1, 1987
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Abstract
Abstract
| The Mangani mine in West Sumatra is historically one of the most important precious metal mines in Indonesia, although the past production by World standards is small, totall- ing 5.66 tonnes gold and 242 tonnes silver. The geology is dominated by a distinctive NW-SE graben structure formed by dextral splay faults from the Sumatran Fault System. Quartz- rhodochrosite-rhodonite-Ag-Au veins are hosted by Tertiary pyroxene andesite volcanics and quartz-phyllite conglomerates, on N-S tensional fractures which intersect the Mangani graben. Intrusive rocks include andesitic dykes, pyroxene microdiorite, and hornblende granodiorite. Quartz-epidote-pyrrhotite alteration is related to concealed intrusions. Precious metal vein mineralization is characterized by: high Ag/Au ratio (>25); complex sulphide mineralogy of Fe, Mn, Ag, Cu, Pb, Zn, As, Se and the occurrence of Sn as stannite; low total sulphide content ( |
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