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- W2262143283 abstract "Electrum (36.39-41.00 atom.% Ag)-sulfide mineralization of the Keumsan mine in the BoseongJangheung area, Cheollanamdo Province, was deposited in two paragenetic stages of mineralogically simple, massive quartz veins that fill the fractures along fault shear zones in Precambrian gneiss. Fluid inclusion data show that main ore mineralization was formed from H₂O-NaCl fluids with relatively low salinities (0.5 to 10.1 wt. % equiv. NaCl) at temperatures between 162 and 3920. Evidence of initial fluid boiling indicates pressures up to 580 bars. Gold(-silver) deposition was probably a result of decreasing sulfur activity accompanying boiling caused by sulfide precipitation and/or H₂S loss. Calculated sulfur isotope composition of ore fluids (δ^(34)SES=0.2 to 1.0‰) indicates an igneous source of sulfur in hydrothermal fluids. Measured and calculated, 0 and H isotope compositions of ore fluids (δ^(13)O_(water)-6.8 to 8.6‰, δD_(water)=-81 to -93‰) indicate that auriferous fluids at Keumsan were likely mixtures between HZO-rich, isotopically evolved meteoric waters and magmatic fluids." @default.
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- W2262143283 date "1995-01-01" @default.
- W2262143283 modified "2023-09-24" @default.
- W2262143283 title "전남 보성 - 장흥지역 금산광산의 금 - 은 광화작용 : 유체포유물 및 안정동위원소 연구" @default.
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