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Hydrogen and Oxygen Isotope Study on the Water–Rock Interaction of the Yinshan (Cu–) Pb–Zn–Ag Ore Deposit, Jiangxi Province
Author(s) -
Ligang Zhang,
Jingxiu Liu,
Guixiang Yu,
Zhensheng Chen
Publication year - 1996
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1996.mp9003005.x
Subject(s) - phyllite , mineralization (soil science) , quartz , meteoric water , geology , geochemistry , vein , mineralogy , magmatic water , hydrogen , groundwater , chemistry , metamorphic rock , soil science , geotechnical engineering , psychology , paleontology , schist , organic chemistry , psychiatry , soil water
The δ 18 O values of vein quartz of different stages from the Yinshan ore deposit are constant around 16‰ and the calculated δ 18 O H 2 O values attain 8‰± the δ5D H 2 O . values of fluid inclusions in vein quartz are constant at about –60‰. From the surface down to 1200 m below the δ l8 O values of altered rocks gradually decrease from 15‰ ± to ll‰ ± . Various water–rock inversion calculations indicate that the ore fluids were formed by the interaction between meteoric water and phyllite at 350°C and the effective W/R value of around 0.1. When the water–rock exchange in the upper mineralization system took place, the effective W/R value increased to 5.0 or more. As a result, an evolution and mineralization model of a buffered open system with two–stage water–rock interactions is proposed in this study.