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- W2380328664 abstract "Hydrothermal alteration is caused by fluid-rock interaction in the migration process of the ore-bearing hydrothermal fluids.The hydrothermal alterations of the Qianhe gold deposit might be divided into seven types, namely potash feldspathization,propylitization,sericitization,silicification,pyritization,carbonation and fluoritization.The alteration-mineralization process and the alteration zones can be divided respectively into six stages and three zones,in order of botite-potash feldspar stage→propylite stage→phyllic stage→pyrite-quartz stage→quartz-pyrite stage→carbonate-halide stage,forming outer,central and inner zones.Analyses of major and trace elements for five typical altered rocks indicate that,during phyllic alteration,Si,K,Pb increased considerably and HREE concentrated a bit with the slight decrease of REE.Negative anomalies ofδEu andδCe were present in each alteration-mineralization stage.These factors might be responsible for gold precipitation.The metasomatic characteristics of fluid-rock interaction at every ore-forming stage are also reflected in chemical composition variation of chlorite." @default.
- W2380328664 created "2016-06-24" @default.
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- W2380328664 date "2009-01-01" @default.
- W2380328664 modified "2023-10-02" @default.
- W2380328664 title "Hydrothermai alteration geochemistry of the Qianhe gold deposit in western Henan Province" @default.
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