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《EARTH SCIENCE》 1996-03
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EVIDENCE AND MECHANISM OF WATER ROCK INTERACTION DURING MINERALIZATION OF SANDSTONE HOSTED COPPER DEPOSITS IN CENTRAL YUNNAN PROVINCE

Zhuang Hanping (Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640) Ran Chongying He Mingqin (Department of Geology, Kunming Institute of Technology, Kunming 650093) Lu Jialan (Guangzhou Institute of Geochemistry, C  
In this paper some evidence is collected for water rock interactions during the mineralization of sandstone hosted. copper deposits in Central Yunnan Province, China, based on studies of field geological occurrence, petrochemistry, organic petrology, element geochemistry, and organic geochemistry. Mechanism of water rock reaction discussing in the present paper involve filtration, hybridization, replacement, metasomatic alteration, redox and boiling. The results obtained demonstratethat:(1) the water rock interactions were responsible for the mineralization of copper , and the reactions carried out in two stages:diagenetic stage and transformation stage;(2) during the diagenetic mineralization, filtration, hybridization and metasomatic alteration were predominant;however, boling and redox were predominantly important during the transformation;(3) water rock reaction during transformation superimposed, at some extent, on products formed during diagenetic interactions.
【Fund】: 国家自然科学基金 有机地球化学国家重点实验室
【CateGory Index】: P59
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