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- W852944877 abstract "The Yonghwa, Weolseong, Soowang and Kilyoung Au-Ag deposits in the Muju-Youngdong area are emplaced along the fissure of Ns-25W direction in middle Cretaceous porphyritic granite or Precambrian Sobaegsan gneiss complex. Sulfur, carbon, oxygen, hydrogen isotope studies were carried out for stage I, II, III and IV mineral assemblage. The δ values of sulfides fall in a very narrow range throughout the paragenesis with the total range for sphalerite, galena and pyrite +0.9‰, to 5.5‰ The sulfur isotope data indicate a deep-seated source for the hydrothermal sulfur. δ values in the carbonates range from - 8.7‰ to - 3.5‰ during postote deposition. The carbon isotope data was probably derived from a deep-seated source. The δ of the hydrothermal fluid was determined from δ values of quartz and calcite. δ of most of the hydrothermal fluids in each mineralization stage range from - 6.3‰ to - 2.0‰, in stage I, from - 10.4‰ to - 5.6‰ in stage II, from - 9.3‰ to - 5.3‰ in stage III and from - 3.8‰, to + 4.8‰, in stage IV. δD values of sericites range from - 93.1‰, to - 89.8‰. Oxygen and hydrogen isotope studies reveal that meteoric water dominate over ore-bearing fluid." @default.
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- W852944877 date "1997-01-01" @default.
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- W852944877 title "Stable Isotope Study of Gold-Silver Deposits in the Muju-Youngdong Area" @default.
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