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- W44872033 abstract "Among the deposits of porphyry ore formation copperporphyry (Au up to 0,4 g/t, Cu /100 Au from 500 up to 2000), gold copper porphyry (Au 0.5...3 g/t, Cu/100 Au 11...150) and copper-molibden-ic-porphyry deposits are distinguished. They differ by the various contents of Cu, Mo, Au, Pt, Pd in ores and sulfide associations. During the formation of maternal subvolcanic granitoid magmatic bodies the dissipation of Au, Pt, Pd in various types of the appeared rocks took place: 1,8-4,1 mg/t Au, 0.5...6 mg/t Pt and 7...11 mg/t Pd. Automatic metasomatic processes of acid leaching of diorites, porphyrites, granodiorites, plagiogranites (cericitization) resulted in insignificant accumulation of noble metals (mg/t): 12...34 Au, 12...48 Pt, 12...78 Pd, k„ 1,2...8,7) in the products of metasomatism. Only the final hydrother-mal processes of silicif ication and sulf idizing of magmatites provided rich concentration of noble metals in metasomatism zones: 0.5...12 g/t Au, 0,1..0,5 g/t Pt and 0,05-0,3 g/t Pd, k„ 100.-1600 and more). During the evolution of porphyry magma-fluid columns gold and partially platinum, palladium and osmium enrichment of their apical parts took place, and subvolcanic gold copper porphyry deposits with concomitant members of platinum group (MPG) appeared. The regions of paleoriphtogenesis and TMA with such surface developments of porphyry intrusions of high-aip type are the most perspective for searching for industrial integrated mineralization with noble metals." @default.
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- W44872033 date "2003-01-01" @default.
- W44872033 modified "2023-09-23" @default.
- W44872033 title "Золото и платиновые металлы в медно-молибден-порфировых месторождениях" @default.
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