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Possible Carbonate Origin of Ore Sulfur from Geumseong Mo Deposit, South Korea
Author(s) -
ISHIHARA Shunso,
KAJIWARA Yoshimichi,
JIN Myung–Shik
Publication year - 2002
Publication title -
resource geology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 43
eISSN - 1751-3928
pISSN - 1344-1698
DOI - 10.1111/j.1751-3928.2002.tb00138.x
Subject(s) - geology , skarn , geochemistry , sulfur , pyrite , molybdenite , carbonate , hydrothermal circulation , sulfide , sulfide minerals , mineralogy , fluid inclusions , chemistry , paleontology , organic chemistry
In order to know the cause of the high δ 34 S values of the Korean ore deposits (Ishihara et al., 2000), Geumseong molybdenum skarn deposit and related Jurassic granitoids and Cambro‐Ordovician carbonates were selected for the δ 34 S analyses. Two sulfide samples occurring in hydrothermal veins in fresh granitoids quarry at Songhaksan yielded δ 34 S values of +6.9 and +8.8 permil. These are slightly higher than +5.3 permil δ 34 S of the averaged rock sulfides for the Jurassic Daebo granitoids. Pyrite and molybdenite from the Geumseong deposit vary from +8.6 to +11.5 permil (average + 10.7 permil). The intruded carbonates contain very low amount of SSS (structurally substituted sulfate) as 2.9 to 8.1 ppm with high δ 34 S values between +28.8 and + 40.0 permil, and sulfides sulfur of 52 to 779 ppm with variable δ 34 S values between +3.2 and +22.5 per–mil. It is concluded that sulfur of the host carbonates was extracted and migrated into the skarn deposit at the time of the granitoid intrusion and the related hydrothermal convection, on the basis of the location of the skarn deposit occurring between the carbonates and Jurassic granitoids, and of very low contents of SSS sulfur in the carbonates. A part of SSS possibly contaminated into the Jurassic granite.