Stable isotope systematics of Ulsan FeW skarn deposit, Korea

From the measurements of oxygen and carbon isotope ratios (δ13C=1.2–4.6 relative to V-PDB, and δ18O=13.5–22.1 ℵrelative to V-SMOW) of fresh or partly altered limestones at the Ulsan skarn deposit, it is suggested that the origin of carbonate rocks is marine carbonate rather than carbonatite. Moreover, the calculated isotopic compositions (δ13C=−7.67 ℵ and δ18O=6.75 ℵ) of the hydrothermal fluid in the main Fe stage of skarn formation imply that …