| The Bulong Gold Deposit-a Quartz-Barite Vein Type Gold Deposit in Xinjiang:Geological Characteristics and S, He and Ar Isotopic Compositions |
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| 作者姓名： | YANG Fuquan WANG Yitian and MAO Jingwen Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing |
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| 作者单位： | YANG Fuquan，WANG Yitian and MAO Jingwen Institute of Mineral Resources，Chinese Academy of Geological Sciences，Beijing 100037; |
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| 摘 要： | The Bulong gold deposit, located in the southwest Tianshan in China, occurs in the Upper Devonian finegrained clastic rocks. The gold orebodies are controlled by an gently inclined interlayer fractured zone. They are hosted only in quartz-barite veins though there are barite veins and quartz veins in the ore district. The δ34S values of pyrite in the ores range from 14.6‰ to 19.2‰ and those of barite from 35.0‰ to 39.6‰, indicating that the sulfur was derived from the strata. 3He/4He ratios of fluid inclusions in pyrite are 0.24-0.82 R/Ra, approximating to that of the crust. The 40Ar/39Ar ratios range from 338 to 471, slightly higher than that of the atmosphere. 40Ar /4He ratios of ore fluids range from 0.015 to 0.412 with a mean of 0.153. Helium and argon isotope compositions of fluid inclusions show that the ore fluids of the Bulong gold deposit were mainly derived from the crust.
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| 关 键 词： | 石英重晶石脉 金矿床 地质沉积 硫黄 新疆 |
The Bulong Gold Deposit-a Quartz-Barite Vein Type Gold Deposit in Xinjiang:Geological Characteristics and S, He and Ar Isotopic Compositions |
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| Authors: | YANG Fuquan WANG Yitian and MAO Jingwen Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing |
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| Abstract: | Abstract The Bulong gold deposit, located in the southwest Tianshan in China, occurs in the Upper Devonian finegrained clastic rocks. The gold orebodies are controlled by an gently inclined interlayer fractured zone. They are hosted only in quartz‐barite veins though there are barite veins and quartz veins in the ore district. The δ34S values of pyrite in the ores range from 14.6‰ to 19.2‰ and those of barite from 35.0‰ to 39.6‰, indicating that the sulfur was derived from the strata. 3He/4 He ratios of fluid inclusions in pyrite are 0.24–0.82 R/Ra, approximating to that of the crust. The 40Ar/36Ar ratios range from 338 to 471, slightly higher than that of the atmosphere. 40Ar /4He ratios of ore fluids range from 0.015 to 0.412 with a mean of 0.153. Helium and argon isotope compositions of fluid inclusions show that the ore fluids of the Bulong gold deposit were mainly derived from the crust. |
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| Keywords: | quartz-barite vein type gold deposit geology of deposit sulfur helium and argon isotopes Bulong Xinjiang |
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