| Genetic Type and Metallogenic Mechanism of Bankuan Gold Deposit in Special Reference to the Studies of Fluid Inclusions and Isotopes in Minerals |
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| 作者姓名： | 陈衍景 赵太平 |
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| 作者单位： | [1]UnstituteofGeolchemistry,ChineseAcademyoifSciences,Guiyang550002 [2]InstituteofGeology,HenanProvince,Zhe |
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| 摘 要： | Auriferous quartz veins in the Bankuan gold deposit occur in the interlayer broken zone of the basal conglomerate of the Tietonggou Formation or at the unconformity between the Tietonggou Formation and the crystalline basement.The composition of fluid inclusions in the minerals indicates that the nature and composition of ore-forming hydrothermal solutions show a drastical change soon after the solutions reached the Tietonggou Formation from the crystalline basement,resulting in gold precipitation.So the Bankuan gold deposit can be assigned to the conglomerate stata-bound-type deposits.137 thermometric data are concentrated in the three ranges 400-340℃,330-220℃ and 180-160℃,representing three episodes of metalogenesis,Oxygen isotope studies demonstrate the evolution of ore-forming hydrothermal solutions from early metamorphic to late meteoric,Diversity of ore-forming materials dominated by deep-source material is supported by sulphur and lead isotope data.From the above discussions it may be concluded that the deposit formed by metamorphism induced as a result of Mesozoic northward intracontinental subduction along the Machaoying fault.
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| 关 键 词： | 金矿床 流体包裹体 同位素 河南 地质构造 |
Genetic type and metallogenic mechanism of Bankuan gold deposit in special reference to the studies of fluid inclusions and isotopes in minerals |
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| Yanjing Chen,Taiping Zhao,Jian Deng,Shigu Fu,Chiyao Jin.Genetic Type and Metallogenic Mechanism of Bankuan Gold Deposit in Special Reference to the Studies of Fluid Inclusions and Isotopes in Minerals[J].Chinese Journal of Geochemistry,1994,13(1):73-84. |
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| Authors: | Yanjing Chen Taiping Zhao Jian Deng Shigu Fu Chiyao Jin |
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| Institution: | (1) Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang;(2) Institute of Geology, Henan Province, 450053 Zhengzhou;(3) Department of Earth Science, Nanjing University, 210008 Nanjing |
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| Abstract: | Auriferous quartz veins in the Bankuan gold deposit occur in the interlayer broken zone of the basal conglomerate of the Tietonggou
Formation or at the unconformity between the Tietonggou Formation and the crystalline basement. The composition of fluid inclusions
in the minerals indicates that the nature and composition of ore-forming hydrothermal solutions show a drastical change soon
after the solutions reached the Tietonggou Formation from the crystalline basement, resulting in gold precipitation. So the
Bankuan gold deposit can be assigned to the conglomerate strata-bound-type deposits. 137 thermometric data are concentrated
in the three ranges 400–340 °C, 330–220 °C and 180–160 °C, representing three episodes of metallogenesis. Oxygen isotope studies
demonstrate the evolution of ore-forming hydrothermal solutions from early metamorphic to late meteoric. Diversity of ore-forming
materials dominated by deep-source material is supported by sulphur and lead isotope data. From the above discussions it may
be concluded that the deposit formed by metamorphism induced as a result of Mesozoic northward intracontinental subduction
along the Machaoying fault.
The project was financially supported by the National Natural Science Foundation of China and the Foundation of the Laboratory
of Ore Deposit Geochemistry, Chinese Academy of Sciences. |
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| Keywords: | Bankuan gold deposit isotope fluid inclusions in minerals conglomerate strata-bound deposit metallogenesis Henan |
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