| 江西铜坑嶂钼矿和红山铜矿含矿斑岩锆石U-Pb定年及其地质意义 |
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| 引用本文： | 苏慧敏,谢桂青,孙嘉,张承帅,程彦博.江西铜坑嶂钼矿和红山铜矿含矿斑岩锆石U-Pb定年及其地质意义[J].岩石学报,2010,26(3):819-829. |
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| 作者姓名： | 苏慧敏 谢桂青 孙嘉 张承帅 程彦博 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京,100083
2. 中国地质科学院矿产资源研究所,北京,100037 |
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| 基金项目： | 国家重点基金项目(40930419)资助 |
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| 摘 要： | 江西铜坑嶂钼矿和红山铜矿是在武夷山成矿带中最近发现的两个斑岩型矿床。本文利用LA-ICP-MS锆石U-Pb定年方法对铜坑嶂花岗斑岩和红山含矿花岗斑岩分别进行了年代学研究,获得铜坑嶂岩体中花岗斑岩的锆石年龄为138±1Ma,代表斑岩体侵位的年龄;红山矿区含矿斑岩的锆石年龄,分作两期,分别为99Ma和49Ma,两期不同的年龄可能代表了两期热事件。研究表明,铜坑嶂钼矿的成岩成矿时代均发生在白垩纪,其岩浆作用与成矿作用基本吻合。综合前人资料,认为铜坑嶂钼矿区的斑岩和红山铜矿区的斑岩可能分别形成于大陆弧后伸展带和岩石圈伸展环境。
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| 关 键 词： | 锆石 含矿斑岩 LA-ICP-MS 铜坑嶂 红山 |
| 收稿时间： | 1/5/2010 12:00:00 AM |
| 修稿时间： | 2010/2/23 0:00:00 |
Zircon U-Pb dating for the granite prophyries in Hongshan prophry copper deposit and Tongkenzhang porphyry molybdenum deposits in East Jiangxi Province and their significance |
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| Su HM,Xie GQ,Sun J,Zhang CS and Cheng YB.Zircon U-Pb dating for the granite prophyries in Hongshan prophry copper deposit and Tongkenzhang porphyry molybdenum deposits in East Jiangxi Province and their significance[J].Acta Petrologica Sinica,2010,26(3):819-829. |
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| Authors: | Su HM Xie GQ Sun J Zhang CS and Cheng YB |
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| Institution: | Faculty of Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Faculty of Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China;Faculty of Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China;Faculty of Sciences and Mineral Resources, China University of Geosciences, Beijing 100083, China |
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| Abstract: | The Tongkengzhang molybdenum deposit and Hongshan copper deposit are two important porphyry deposits in the Wuyishan metallogenic belt in Southeast China. After performance of LA-ICP-MS zircon U-Pb dating, we obtained 138±1Ma for the granite-prophyry in Tongkengzhang porphyry Mo deposit, and 99Ma and 49Ma for the granite prophyry in Hongshan porphyry Cu mine. The LA-ICP-MS zircon U-Pb dating of the granite prophyry in Hongshan deposit gives two distinguishing ages, which possibly represent the granite porphyry crystallization and disturb of post-mineralization thermal event, respectively. The data show the ages of the granite porphyry are consistent with those molybdenite Re-Os dating achieved by previous studies, which reflects the Cretaceous rock- and ore-forming event. Based on compiled data from previous researches, we suggest that the Tongkengzhang Mo porphyry and the Hongshan Cu porphyry occurred in the extensional belt of the continental back arc and in the extensional faulted basins trigged by lithospheric thinning, respectively. |
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| Keywords: | Zircon Granite prophyry LA- ICP-MS Tongkenzhang Hongshan |
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