| 内蒙古乌拉特中旗图古日格金矿辉钼矿Re-Os同位素年龄及其意义 |
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| 引用本文： | 张锋,李志丹,王佳营,陈军强,文思博,李超,邵国钰,赵宇川,俞礽安. 内蒙古乌拉特中旗图古日格金矿辉钼矿Re-Os同位素年龄及其意义[J]. 中国地质, 2016, 0(5): 1771-1779 |
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| 作者姓名： | 张锋 李志丹 王佳营 陈军强 文思博 李超 邵国钰 赵宇川 俞礽安 |
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| 作者单位： | 天津地质矿产研究所, 天津 300170,天津地质矿产研究所, 天津 300170,天津地质矿产研究所, 天津 300170,天津地质矿产研究所, 天津 300170,天津地质矿产研究所, 天津 300170,国家地质实验测试中心, 北京 100037,核工业二〇八大队, 内蒙古 包头 014010,核工业二〇八大队, 内蒙古 包头 014010,天津地质矿产研究所, 天津 300170 |
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| 基金项目： | 中国地质调查项目（12120113057300；12120113057400）及国家自然科学基金项目（41502082）联合资助。 |
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| 摘 要： | 图古日格是内蒙古宝音图地块内的一例具有中型规模的金矿床。含金石英脉呈NW向穿插于各类晚古生代岩体与下元古界宝音图群地层中,矿体走向、倾向延伸相对稳定。金属矿物主要为黄铁矿、黄铜矿、方铅矿等,脉石矿物为石英、方解石等。发育硅化、绢云母化、绿泥石化、绿帘石化等围岩蚀变。与金共生的辉钼矿Re-Os等时线年龄为(305.6±4.5)Ma、模式年龄为(313.5±4.8)Ma,限定图古日格金矿是晚石炭世构造-岩浆活动的产物。辉钼矿Re含量介于42.42×10-6~307.7×10-6,显示成矿物质可能为壳幔混合来源。
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| 关 键 词： | Re-Os同位素 成矿年龄 图古日格金矿 乌拉特中旗 内蒙古 |
| 收稿时间： | 2015-07-16 |
| 修稿时间： | 2015-11-13 |
Molybdenite Re-Os dating of the Tugurige gold deposit, Urad Middle Banner, Inner Mongolia, and its geological significance |
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| ZHANG Feng,LI Zhi-dan,WANG Jia-ying,CHEN Jun-qiang,WEN Si-bo,LI Chao,SHAO Guo-yu,ZHAO Yu-chuan and YU Reng-an. Molybdenite Re-Os dating of the Tugurige gold deposit, Urad Middle Banner, Inner Mongolia, and its geological significance[J]. Geology in China, 2016, 0(5): 1771-1779 |
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| Authors: | ZHANG Feng LI Zhi-dan WANG Jia-ying CHEN Jun-qiang WEN Si-bo LI Chao SHAO Guo-yu ZHAO Yu-chuan YU Reng-an |
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| Affiliation: | Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China,Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China,Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China,Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China,Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China,National Research Center of Geoanalysis, Beijing 100037, China,No. 208 Geological Party, CNNC, Baotou 014010, Inner Mongolia, China,No. 208 Geological Party, CNNC, Baotou 014010, Inner Mongolia, China and Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China |
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| Abstract: | Tugurige is a middle-sized gold deposit in Buyant Block, Inner Mongolia. The NW-striking gold-bearing quartz veins penetrate the Late Paleozoic rock mass and Lower Proterozoic Buyant Group. The orebody stably extends along the strike and the dip. The metallic minerals mainly include pyrite, chalcopyrite and galena, whereas the gangue minerals are predominately quartz and calcite. The alteration in the wall rocks includes silicification, sericitization and epidotization. The Re-Os dating of molybdenite samples from gold ore yielded a Re-Os isochron age of (305.6±4.5) Ma with an average of (313.5±4.8) Ma. This implies that the Au and Mo mineralization occurred in Late Carboniferous. The Re content of molybdenites in the Tugurige gold deposit is 42.42×10-6-307.7×10-6, suggesting that the ore-forming material was derived mainly from a mixed source of crust and mantle. |
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| Keywords: | Re-Os isotopes metallogenic ages Tugurige gold deposit Urad Middle Banner Inner Mongolia |
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