| 西藏波龙斑岩铜金矿床的Re-Os同位素年龄及其地质意义 |
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| 引用本文： | 祝向平,陈华安,马东方,黄瀚霄,李光明,李玉彬,李玉昌.西藏波龙斑岩铜金矿床的Re-Os同位素年龄及其地质意义[J].岩石学报,2011,27(7):2159-2164. |
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| 作者姓名： | 祝向平 陈华安 马东方 黄瀚霄 李光明 李玉彬 李玉昌 |
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| 作者单位： | 1. 成都地质矿产研究所,成都,610081
2. 西藏地质矿产勘查开发局第五地质大队,格尔木,816000 |
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| 基金项目： | 本文受国家973项目(2011CB403100)和中国地质调查局地质矿产调查评价专项(1212011086074)联合资助. |
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| 摘 要： | 波龙斑岩铜金矿紧邻多不杂矿床,是多龙矿集区内新发现的一个超大型矿床。波龙矿床早期有两次成矿花岗闪长斑岩侵位,随后较晚期花岗斑岩侵位;地表广泛分布绢英岩化蚀变,深部发育钾化。本文对采于波龙斑岩型铜金矿床内石英-辉钼矿脉中的4件辉钼矿样品进行了Re-Os同位素测试,获得等时线年龄为119.4±1.3Ma (MSWD=0.63, n=4)。此年龄代表了波龙矿床的成矿年龄,与多不杂斑岩型铜金矿床的成矿年龄一致。波龙和多不杂斑岩型铜金矿床紧邻,并具有一致的成矿年龄,可能表明两个矿床的成矿受控于相同的构造-岩浆-成矿事件;斑岩铜矿具有成群分布的特征,波龙和多不杂斑岩铜金矿床的发现也暗示多龙矿集区具有找到其他大型斑岩铜金矿的潜力。
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| 关 键 词： | 波龙 斑岩铜金矿 成矿年龄 多龙矿集区 |
| 收稿时间： | 4/1/2011 12:00:00 AM |
| 修稿时间： | 2011/5/28 0:00:00 |
Re-Os dating for the molybdenite from Bolong porphyry copper-gold deposit in Tibet, China and its geological significance |
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| ZHU XiangPing,CHEN HuaAn,MA DongFang,HUANG HanXiao,LI GuangMing,LI YuBin and Li YuChang.Re-Os dating for the molybdenite from Bolong porphyry copper-gold deposit in Tibet, China and its geological significance[J].Acta Petrologica Sinica,2011,27(7):2159-2164. |
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| Authors: | ZHU XiangPing CHEN HuaAn MA DongFang HUANG HanXiao LI GuangMing LI YuBin and Li YuChang |
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| Institution: | Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China;Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China;Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China;Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China;Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China;No.5 Geological Party, Tibet Bureau of Geology and Mineral Exploration and Development, Golmud 816000, China;No.5 Geological Party, Tibet Bureau of Geology and Mineral Exploration and Development, Golmud 816000, China |
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| Abstract: | Bolong porphyry Cu-Au deposit, neighbouring Duobuza porphyry Cu-Au deposit, is a newly discovered deposit. Two stages of granodiorite porphyries were emplaced in Bolong deposit, and followed by later intruding granite porphyry. Phyllic alteration is occurring on the surface of Bolong deposit, and potassic alteration was found in the depth associating with granodiorite porphyries. At Bolong, Re-Os data of four molybdenite samples from quartz-molybednite veinlets yielded an isochron age at 119.4±1.3Ma (MSWD=0.63, n=4), coincident to the mineralization age of Duobuza deposit. Similar mineralization age, closely neighbouring spatial distribution of Bolong and Duobuza porphyry deposits suggest that these two deposits might be generated from a same tectonic-magmatic activity background, and some potential large porphyry copper deposits could be occurred in Duolong metallogenic district. |
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| Keywords: | Bolong Porphyry copper-gold deposit Ore-forming age Duolong metallogenic district |
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