| Supergene Geochemistry of Gold and Oxidation Zone of the Sain Us Gold Deposit in the Inner Mongolian Arid Region |
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| 作者姓名： | Ma Mintao and Guan Guangyue |
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| 作者单位： | Ma Mintao and Guan Guangyue Department of Chemistry and Environment Engineering，Beijing Polytechnic University，Beijing Geological Department，Northeast University of Technology，Shenyang，Liaoning Fei Zhenbi |
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| 摘 要： | The Sain Us gold deposit is a typical auriferous sulphide quartz vein deposit in the InnerMongolian arid steppe climatic region. The oxidation zone has been controlled by the arid cli-mate since the beginning of the Holocene. Gold supergene evolution is characterized by enlarge-ment of gold grains, complication of the gold form, raising of the gold grade and increase of thegold fineness; besides, gold and silver have two enrichment peaks at the same depth, which is insharp contrast to the unimodal enrichment of gold and silver and the occurrence of gold aboveand silver below in a humid climatic region. Sun pumping is the main cause for the bimodalenrichment of gold and silver. Illite 2 M_1 is one of the main causes for the upper enrichment peakof gold and silver.
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Supergene Geochemistry of Gold and Oxidation Zone of the Sain Us Gold Deposit in the Inner Mongolian Arid Region |
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| Authors: | Ma Mintao and Guan Guangyue |
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| Institution: | Ma Mintao and Guan Guangyue Department of Chemistry and Environment Engineering,Beijing Polytechnic University,Beijing Geological Department,Northeast University of Technology,Shenyang,Liaoning Fei Zhenbi |
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| Abstract: | The Sain Us gold deposit is a typical auriferous sulphide quartz vein deposit in the InnerMongolian arid steppe climatic region. The oxidation zone has been controlled by the arid cli-mate since the beginning of the Holocene. Gold supergene evolution is characterized by enlarge-ment of gold grains, complication of the gold form, raising of the gold grade and increase of thegold fineness; besides, gold and silver have two enrichment peaks at the same depth, which is insharp contrast to the unimodal enrichment of gold and silver and the occurrence of gold aboveand silver below in a humid climatic region. Sun pumping is the main cause for the bimodalenrichment of gold and silver. Illite 2 M_1 is one of the main causes for the upper enrichment peakof gold and silver. |
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| Keywords: | arid climate gold deposit oxidation zone gold supergene enrichment palaeoclimate sun pumping |
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