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논문 기본 정보

자료유형
학술저널
저자정보
Weijun He (School of Earth Sciences Chengdu University of Technology Chengdu China) Youguo Li (School of Earth Sciences Chengdu University of Technology Chengdu China) Sigen Ma (Guizhou University of Finance and Economics Guiyang China)
저널정보
한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.27 No.2
발행연도
2023.4
수록면
209 - 224 (16page)
DOI
10.1007/s12303-022-0031-0

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The Daliang zinc deposit occurs in the southwestern Xiangxi–Qiandong Zn-Pb metallogenic belt and is located on the southeastern margin of the upper Yangtze block. In this study, we present results from petrographic observations, rare earth elements, C-H-O isotopes, and fluid inclusions. The zinc deposit is hosted by middle Cambrian dolomite. The ore-forming process is divided into three stages from early to late: pyrite-galena, sphalerite-pyrite-dolomite, and dolomite. The characteristics of the REEs suggest that multiple fluids were involved in hydrothermal dolomite precipitation under low-temperature conditions. Two types of hydrothermal dolomite fluid inclusions were identified: pure liquid phase inclusions and liquid-rich phase inclusions. The fluid inclusions of hydrothermal dolomite yield homogenization temperatures of 108–192℃ (average 153℃), with salinities of 12.3–26.4 wt% (average 23.0 wt%) NaCl equiv. The δ13Cfluid, δDfluid and δ18Ofluid values for ore-forming fluids range from −4.2 to −3.5‰ (mean −3.8‰), −38.8 to −34.3‰ (mean −36.0‰), and 6.2–6.4‰ (mean 6.3‰), respectively. This study demonstrates that ore-forming fluid was sourced from a moderate- to high-salinity basinal brine and leached metals from metasedimentary rocks of the basement in the Yangtze block. The main transportation of ore-forming fluid occurred in the form of chlorine complexes along well-developed faults, and sulfides precipitated with decreases in pressure and temperature, as well as pH changes. Studies of the Daliang zinc deposit suggest that it is a mediumto low-temperature MVT-like deposit.

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