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| 江西乐平塔前钨钼矿中辉钼矿Re-Os定年及其地质意义 | |
| 引用本文： | 黄安杰,温祖高,刘善宝,刘消清,刘献满,张家菁,施光海,刘战庆. 江西乐平塔前钨钼矿中辉钼矿Re-Os定年及其地质意义[J]. 岩石矿物学杂志, 2013, 32(4): 496-504 |
| 作者姓名： | 黄安杰 温祖高 刘善宝 刘消清 刘献满 张家菁 施光海 刘战庆 |
| 作者单位： | 1. 江西地矿局赣东北大队,江西上饶,334000 2. 中国地质科学院矿产资源研究所,北京,100037 3. 江西地矿局物化探大队,江西南昌,330025 4. 江西省国土资源执法监察总队,江西南昌,330025 5. 中国地质大学地球科学与资源学院,北京,100083 6. 桂林理工大学地球科学学院,广西桂林,541004 |
| 基金项目： | 江西省国土资源厅地质勘查基金(矿[2012]01-06)国家重点基础研究发展计划973课题 |
| 摘 要： | 江西乐平塔前钨钼矿床位于下扬子板块南缘的“塔前-赋春”成矿带,近年找矿工作取得了重大突破,显示该成矿带具有极好的成矿地质条件和巨大的找矿潜力.本文利用ICP-MS对矿石矿物辉钼矿进行了Re-Os同位素分析,5个样品的模式年龄变化在160.8～ 163.4 Ma之间,Re-Os同位素等时线年龄为162±2 Ma(MSWD=1.7),表明矿床形成于中侏罗世晚期.通过对区域同类矿床的成矿年代对比发现,塔前赋春成矿带中矿床的形成时间明显晚于其周边的德兴铜矿等矿床,且主要控矿构造也相差很大,其原因可能与不同时期的构造背景有关. |
| 关 键 词： | Re-Os定年 辉钼矿 塔前钨钼矿床 扬子板块 |
| 收稿时间： | 2013-05-02 |
| 修稿时间： | 2013-06-19 |
Re-Os isotopic dating of molybdenite from the Taqian W-Mo deposit in Leping County, Jiangxi Province and its geological implications |
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| HUANG An-jie,WEN Zu-gao,LIU Shan-bao,LIU Xiao-qing,LIU Xian-man,ZHANG Jia-jing,SHI Guang-hai and LIU Zhan-qing. Re-Os isotopic dating of molybdenite from the Taqian W-Mo deposit in Leping County, Jiangxi Province and its geological implications[J]. Acta Petrologica Et Mineralogica, 2013, 32(4): 496-504 | |
| Authors: | HUANG An-jie WEN Zu-gao LIU Shan-bao LIU Xiao-qing LIU Xian-man ZHANG Jia-jing SHI Guang-hai LIU Zhan-qing |
| Affiliation: | Northeastern Jiangxi Geological Party, Jiangxi Bureau of Geology and Mineral Exploration, Shangrao 334000, China;Northeastern Jiangxi Geological Party, Jiangxi Bureau of Geology and Mineral Exploration, Shangrao 334000, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 10037, China;Northeastern Jiangxi Geological Party, Jiangxi Bureau of Geology and Mineral Exploration, Shangrao 334000, China;Geophysical and Geochemical Exploration Party, Jiangxi Bureau of Geology and Mineral Exploration, Nanchang 330025, China;Law Enforcement and Supervision Office of Department of Land and Resources of Jiangxi Province, Nanchang 330025, China;School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;School of Earth Sciences, Guilin University of Science and En- gineering, Guilin 541004, China |
| Abstract: | The Taqian tungsten-molybdenum deposit is located in the Taqian-Fuchun metallogenic belt on the southern margin of the Yangtze plate. The authors have made a breakthrough in ore-prospecting work in recent years,and the results show that the metallogenic belt has good ore-forming geological conditions and prospecting potential. However, the research work is just in the starting period. In this paper,the authors determined the molybdenite age of the Taqian tungsten molybdenum deposit by means of ICP-MS molybdenite-Os isotope analysis. The model ages of 5 samples vary between 160.8 and 163.4 Ma; the molybdenite Re-Os isochron age is (162±2) Ma, MSWD=1.7,suggesting that the ore-forming process took place in late Early Jurassic. A comparison with the metallogenic time of other similar deposits in this area shows that the ore-forming time in the Taqian-Fuchun metallogenic belt is much later than that of the Dexin copper deposits, and their ore-controlling structures are different too. These phenomena might have had something to do with the tectonic backgrounds of different periods. |
| Keywords: | Re-Os dating molybdenite Taqian tungsten molybdenum deposit Yangtze plate |
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