| Helium and argon isotopic compositions of the Longquanzhan gold deposit in the Yishu fault zone and their geological implications |
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| 作者姓名： | 胡华斌 孙爱群 牛树银 王宝德 李英平 |
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| 作者单位： | College of Resources Shijiazhuang University of Economics，College of Resources，Shijiazhuang University of Economics，College of Resources，Shijiazhuang University of Economics，College of Resources，Shijiazhuang University of Economics，Shandong Institute of Geological Survey，Shijiazhuang 050031，China，Shijiazhuang 050031，China，Shijiazhuang 050031，China，Shijiazhuang 050031，China，Ji’nan 250031，China |
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| 基金项目： | Acknowledgements This research is jointly granted by the National Natural Science Foundation of China （Grant No. 40272088）. |
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| 摘 要： | The Longquanzhan gold deposit hosted in granitic cataclasites with mylontization of the foot wall of the main Yishui-Tangtou fault. 3He/4He ratios in fluid inclusions range from 0. 14 to 0. 24 R/Ra,close to those of the crust-source helium. 40Ar/36Ar ratios were measured to be 289-1811, slightly higher than those of atmospheric argon. The results of analysis of helium and argon isotopes suggested that ore-forming fluids were derived chiefly from the crust. The δ18O values of fluid inclusions from vein quartz range from -1.78‰ to 4.07‰, and the δD values of the fluid inclusions vary between -74‰ and -77‰. The hydrogen and oxygen isotope data indicated that the ore-forming fluid for the Longquanzhan gold deposit had mixed with meteoric water in the process of mineralization. This is consistent with the conclusion from the helium and argon isotope data.
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| 关 键 词： | 沂水县龙泉站金矿 沂沭断裂带 氦同位素成分 氩同位素成分 地质意义 |
| 收稿时间： | 2006-03-03 |
| 修稿时间： | 2006-07-04 |
Helium and argon isotopic compositions of the Longquanzhan gold deposit in the Yishu fault zone and their geological implications |
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| Hu?Huabin,Sun?Aiqun,Niu?Shuyin,Wang?Baode,Li?Yingping.Helium and argon isotopic compositions of the Longquanzhan gold deposit in the Yishu fault zone and their geological implications[J].Chinese Journal of Geochemistry,2007,26(1):46-51. |
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| Authors: | Hu Huabin Sun Aiqun Niu Shuyin Wang Baode Li Yingping |
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| Institution: | (1) College of Resources, Shijiazhuang University of Economics, Shijiazhuang, 050031, China;(2) Shandong Institute of Geological Survey, Ji’nan, 250031, China |
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| Abstract: | The Longquanzhan gold deposit hosted in granitic cataclasites with mylontization of the foot wall of the main Yishui-Tangtou
fault. 3He/4He ratios in fluid inclusions range from 0.14 to 0.24 R/Ra, close to those of the crust-source helium. 40Ar/36Ar ratios were measured to be 289–1811, slightly higher than those of atmospheric argon. The results of analysis of helium
and argon isotopes suggested that ore-forming fluids were derived chiefly from the crust. The δ18O values of fluid inclusions from vein quartz range from −1.78‰ to 4.07‰, and the δD values of the fluid inclusions vary between
−74‰ and −77‰. The hydrogen and oxygen isotope data indicated that the ore-forming fluid for the Longquanzhan gold deposit
had mixed with meteoric water in the process of mineralization. This is consistent with the conclusion from the helium and
argon isotope data. |
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| Keywords: | helium and argon isotopes ore-forming fluid Yishu fault zone Longquanzhan gold deposit |
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