| 新疆西天山奈楞格勒矿田七兴铅锌多金属矿床Rb-Sr等时线年龄及其地质意义 |
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| 引用本文： | 张立成,王义天,董连慧,张兵,万阈,赵强,王攀.新疆西天山奈楞格勒矿田七兴铅锌多金属矿床Rb-Sr等时线年龄及其地质意义[J].矿床地质,2014,33(1):153-164. |
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| 作者姓名： | 张立成 王义天 董连慧 张兵 万阈 赵强 王攀 |
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| 作者单位： | 中国冶金地质总局青岛地质勘查院, 山东 青岛 266000;中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037;中国地质科学院矿产资源研究所, 国土资源部成矿作用与资源评价重点实验室, 北京 100037;新疆维吾尔自治区地质矿产勘查开发局, 新疆 乌鲁木齐 830000;新疆维吾尔自治 区地质矿产勘查开发局第七地质大队, 新疆 乌苏 833300;新疆维吾尔自治 区地质矿产勘查开发局第七地质大队, 新疆 乌苏 833300;新疆维吾尔自治 区地质矿产勘查开发局第七地质大队, 新疆 乌苏 833300;中国冶金地质总局青岛地质勘查院, 山东 青岛 266000 |
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| 基金项目： | 本文得到中国地质调查局地质大调查项目（1212011085527）资助 |
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| 摘 要： | 奈楞格勒矿田位于西天山博罗霍洛成矿带中北部，主要发育莱历斯高尔钼矿床、3571铜矿床和七兴铅锌多金属矿床。其中，七兴铅锌多金属矿床产于矿田的东北部，赋存于上志留统博罗霍洛山组碎屑岩中，矿体受NE向断裂控制，呈脉状产出。对七兴铅锌多金属矿床石英-硫化物阶段的闪锌矿进行的Rb-Sr同位素测年研究，获得等时线年龄为（362.2±4.9） Ma，表明矿床形成于晚泥盆世—早石炭世。闪锌矿的（87Sr/86Sr）i值为 0.7103~0.7107，平均值为0.7105，指示成矿物质是以幔源为主的壳幔混合来源。结合前人的研究成果认为，七兴铅锌多金属矿床是奈楞格勒矿田在海西期区域性构造-岩浆-热液成矿作用的产物。
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| 关 键 词： | 地球化学 Rb-Sr等时线年龄 闪锌矿 成矿时代 奈楞格勒七兴 西天山 |
| 收稿时间： | 2013/9/23 0:00:00 |
| 修稿时间： | 2013/12/22 0:00:00 |
Rb-Sr isochron age of Qixing Pb-Zn polymetallic deposit in Nailenggele ore field of Western Tianshan, Xinjiang, and its geological significance |
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| ZHANG LiCheng,WANG YiTian,DONG LianHui,ZHANG Bing,WAN Yu,ZHAO Qiang and WANG Pan.Rb-Sr isochron age of Qixing Pb-Zn polymetallic deposit in Nailenggele ore field of Western Tianshan, Xinjiang, and its geological significance[J].Mineral Deposits,2014,33(1):153-164. |
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| Authors: | ZHANG LiCheng WANG YiTian DONG LianHui ZHANG Bing WAN Yu ZHAO Qiang and WANG Pan |
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| Institution: | Qingdao Geological Exploration Institute, China Metallurgical Geology Bureau, Qingdao 266000, Shandong, China;MLR Key Laboratory of Metallogcny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;MLR Key Laboratory of Metallogcny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Xinjiang Bureau of Geology and Mineral Resources, Urumqi 830000, Xinjiang, China;No. 7 Geological Party of Xinjiang Bureau of Geology and Mineral Resources, Usu 833300, Xinjiang, China;No. 7 Geological Party of Xinjiang Bureau of Geology and Mineral Resources, Usu 833300, Xinjiang, China;No. 7 Geological Party of Xinjiang Bureau of Geology and Mineral Resources, Usu 833300, Xinjiang, China;Qingdao Geological Exploration Institute, China Metallurgical Geology Bureau, Qingdao 266000, Shandong, China |
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| Abstract: | Located in the central north part of the Boluohuoluo metallogenic belt in Western Tianshan Mountains, the Nailenggele ore field is mainly composed of the Lailisigaoer Mo deposit, the No. 3571 Cu deposit and the Qixing Pb-Zn polymetallic deposit. The Qixing Pb-Zn polymetallic deposit is hosted in clastic rocks of the upper Silurian Boluohuoluoshan Formation in the northeast of the Nailenggele ore field. The ore bodies occur as veins, controlled by NE-trending faults. In this paper, the Rb-Sr isotopic dating was carried out for the sphalerite of the quartz-sulfide stage in the Qixing Pb-Zn polymetallic deposit, which yielded an isochron age of (362.2±4.9) Ma, suaggesting that the deposit was formed in Late Devonian-Early Carboniferous period. The 87Sr/86Sri values of the sphalerite vary in the range of 0.7103~0.7107 with an average of 0.7105, indicating that ore-forming materials were mainly derived from the mantle. In combination with regional geology, the authors hold that the Qixing Pb-Zn polymetallic deposit was formed by the regional intense tectono-magmatic-hydrothermal metallogenic process in the Nailenggele ore field in Hercynian period. |
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| Keywords: | geochemistry Rb-Sr isochron age sphalerite metallogenic epoch Nailenggele Qixing Western Tianshan |
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