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| 新疆额尔齐斯构造带哲兰德金矿白云母~(40)Ar/~(39)Ar同位素年龄及地质意义 | |
| 引用本文： | 刘国仁,李彦,王蕊,王海培,杨成栋,陈琦,祁世军.新疆额尔齐斯构造带哲兰德金矿白云母~(40)Ar/~(39)Ar同位素年龄及地质意义[J].岩矿测试,2018,37(6):705-712. |
| 作者姓名： | 刘国仁 李彦 王蕊 王海培 杨成栋 陈琦 祁世军 |
| 作者单位： | 中国科学院新疆生态与地理研究所, 新疆 乌鲁木齐 830011,河北省地矿局第七地质大队, 河北 燕郊 065201,自然资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037,新疆维吾尔自治区地质矿产研究所, 新疆 乌鲁木齐 830001,自然资源部成矿作用与资源评价重点实验室, 中国地质科学院矿产资源研究所, 北京 100037,新疆维吾尔自治区地质矿产研究所, 新疆 乌鲁木齐 830001,新疆维吾尔自治区地质矿产研究所, 新疆 乌鲁木齐 830001 |
| 基金项目： | 新疆维吾尔自治区天山英才培养工程项目；新疆维吾尔自治区2014年国家高层次人才特殊支持计划项目 |
| 摘 要： | 哲兰德金矿是额尔齐斯构造带上重要的造山型金矿,产出于韧性剪切带中,金矿化赋存于黄铁矿化闪长岩脉、含金石英脉和黄铁矿化千枚岩中,矿化与韧脆性剪切变形有关。沿剪切面理发育的白云母、绿泥石等新生矿物,为测定金矿形成时代提供了依据。本研究利用白云母~(40)Ar/~(39)Ar年代学手段,确定了韧性剪切带的形成时代和金成矿时代。结果表明白云母坪年龄为295. 4±1. 6 Ma,韧性剪切变形和金成矿作用发生在295 Ma,略早于多拉纳萨依金矿形成时间。结合前人资料认为,新疆额尔齐斯构造带造山型金矿形成于295～270 Ma。 |
| 关 键 词： | 地质特征 40Ar/39Ar年龄 造山型金矿 哲兰德 额尔齐斯构造带 |
| 收稿时间： | 2017/7/13 0:00:00 |
| 修稿时间： | 2018/4/30 0:00:00 |
40Ar/39Ar Dating of Muscovite from the Zhelande Au Deposit, Irtysh Tectonic Zone, Xinjiang and Its Geological Implications |
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| LIU Guo-ren,LI Yan,WANG Rui,WANG Hai-pei,YANG Cheng-dong,CHEN Qi and QI Shi-jun.40Ar/39Ar Dating of Muscovite from the Zhelande Au Deposit, Irtysh Tectonic Zone, Xinjiang and Its Geological Implications[J].Rock and Mineral Analysis,2018,37(6):705-712. | |
| Authors: | LIU Guo-ren LI Yan WANG Rui WANG Hai-pei YANG Cheng-dong CHEN Qi and QI Shi-jun |
| Institution: | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China,No.7 Geological Party of the Hebei Bureau of Geology, Yanjiao 065201, China,Key Laboratory of Metallogeny and Mineral Assessment, Ministry of National Resources;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China,Key Laboratory of Metallogeny and Mineral Assessment, Ministry of National Resources;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China and Xinjiang Urgur Autonomous Region Institute of Geology for Mineral Resources, Urumqi 830001, China |
| Abstract: | BACKGROUND: The Zhelande gold deposit is an important orogenic gold deposit in the Irtysh tectonic belt. This deposit is hosted in the ductile shear zone. Mineralization occurs as gold-bearing pyritized diorite veins, gold-bearing quartz veins, and gold-bearing pyritized phyllite. The mineralization is related to the brittle-ductile shear deformation. Muscovite, chlorite and other new minerals occurred in the shear surface. OBJECTIVES: To determine the metallogenic age by 40Ar/39Ar method. METHODS: Muscovite 40Ar/39Ar dating was used to constrain the timing of ductile shear deformation and gold mineralization. RESULTS: Results show that the plateau age of the muscovite is 295.4±1.6 Ma, suggesting that the ductile shear deformation and gold mineralization occurred at about 295 Ma, slightly earlier than the formation of the Duolanasayi gold deposit. CONCLUSIONS: Combined with previous data, the orogenic gold deposits in the Irtysh tectonic belt of Xinjiang possibly formed at 295-270 Ma. |
| Keywords: | geological characteristics Ar-Ar age orogenic gold deposit Zhelande Irtysh tectonic zone |
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