| Geochemical characteristics of pyrite in Duolanasayi gold deposit, Xinjiang |
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| 作者姓名： | 陈国栋 肖惠良 王鹤年 周济元 |
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| 作者单位： | School of Resources and Environment Engineering，Hefei University of Technology，Hefei 230009，China，Nanjing Institute of Geology and Mineral Resources，Nanjing Center，China Geological Survey，Nanjing 210016，China，Nanjing Institute of Geology and Mineral Resources，Nanjing Center，China Geological Survey，Nanjing 210016，China，Department of Earth Sciences，Nanjing University，Nanjing 210093，China，Nanjing Institute of Geology and Mineral Resources，Nanjing Center，China Geological Survey，Nanjing 210016，China |
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| 摘 要： | The Duolanasayi gold deposit, 60 km NW of Habahe County, Xinjiang Uygur Autonomous Region, is a mid-large-scale gold deposit controlled by brittle-ductile shearing, and superimposed by albitite veins and late-stage magma hydrothermal solutions. There are four types of pyrite, which are contained in the light metamorphosed rocks (limestone, siltstone), altered-mineralized rocks (chlorite-schist, altered albite-granite, mineralized phyllite), quartz veins and carbonatite veinlets. The pyrite is the most common ore mineral. The Au-barren pyrite is present mainly in a simple form and gold-bearing pyrite is present mainly in a composite form. From the top downwards, the pyrite varies in crystal form from {100} and {210} {100} to {210} {100} {111} to {100} {111}. Geochemical studies indicate that the molecular contents of pyrite range from Fe1.057S2 to Fe0.941S2. Gold positively correlates with Mn, Sr, Zn, Te, Pb, Ba and Ag. There are four groups of trace elements: Fe-Cu-Sr-Ag, Au-Te-Co, As-Pb-Zn and Mn-V-Ti-Ba-Ni-Cr in pyrite. The REE characteristics show that the total amount of REE (ΣREE) ranges from 32.35×10 -6 to 132.18×10 -6; LREE/HREE, 4.466-9.142; (La/Yb)N, 3.719-11.133; (Eu/Sm)N, 0.553-1.656; (Sm/Nd)N, 0.602-0.717; La/Yb, 6.26-18.75; δEu, 0.628-2.309; δCe, 0.308-0.816. Sulfur isotopic compositions (δ 34S=-2.46‰--7.02‰) suggest that the sulfur associated with gold mineralization was derived from the upper mantle or lower crust.
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| 关 键 词： | 黄铁矿 黄金 沉淀物 新疆 地球化学 |
Geochemical characteristics of pyrite in Duolanasayi gold deposit, Xinjiang |
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| Guodong Chen,Huiliang Xiao,Henian Wang,Jiyuan Zhou.Geochemical characteristics of pyrite in Duolanasayi gold deposit, Xinjiang[J].Chinese Journal of Geochemistry,2005,24(3):280-288. |
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| Authors: | Guodong Chen Huiliang Xiao Henian Wang Jiyuan Zhou |
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| Institution: | (1) School of Resources and Environment Engineering, Hefei University of Technology, 230009 Hefei, China;(2) Nanjing Institute of Geology and Mineral Resources, Nanjing Center, China Geological Survey, 210016 Nanjing, China;(3) Department of Earth Sciences, Nanjing University, 210093 Nanjing, China |
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| Abstract: | The Duolanasayi gold deposit, 60 km NW of Habahe County, Xinjiang Uygur Autonomous Region, is a mid-large-scale gold deposit
controlled by brittle-ductile shearing, and superimposed by albitite veins and late-stage magma hydrothermal solutions. There
are four types of pyrite, which are contained in the light metamorphosed rocks (limestone, siltstone), altered-mineralized
rocks (chlorite-schist, altered albite-granite, mineralized phyllite), quartz veins and carbonatite veinlets. The pyrite is
the most common ore mineral. The Au-barren pyrite is present mainly in a simple form and gold-bearing pyrite is present mainly
in a composite form. From the top downwards, the pyrite varies in crystal form from {100} and {210}+{100} to {210}+{100}+{111}
to {100}+{111}. Geochemical studies indicate that the molecular contents of pyrite range from Fe1.057S2 to Fe0.941S2. Gold positively correlates with Mn, Sr, Zn, Te, Pb, Ba and Ag. There are four groups of trace elements: Fe-Cu-Sr-Ag, Au-Te-Co,
As-Pb-Zn and Mn-V-Ti-Ba-Ni-Cr in pyrite. The REE characteristics show that the total amount of REE (ΣREE) ranges from 32.35×10−6 to 132.18×10−6; LREE/HREE, 4.466–9.142; (La/Yb)N, 3.719–11.133; (Eu/Sm)N, 0.553–1.656; (Sm/Nd)N, 0.602–0.717; La/Yb, 6.26–18.75; δEu, 0.628–2.309; δCe, 0.308–0.816. Sulfur isotopic compositions (δ34S=−2.46‰–−7.02‰) suggest that the sulfur associated with gold mineralization was derived from the upper mantle or lower crust. |
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| Keywords: | pyrite geochemistry Duolanasayi gold ore deposit Xinjiang |
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