| 新疆兴地Ⅱ号铜镍矿床辉长岩SIMS锆石U-Pb年龄和地质意义 |
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| 引用本文： | 郭瑞清,柴凤梅,韩春明.新疆兴地Ⅱ号铜镍矿床辉长岩SIMS锆石U-Pb年龄和地质意义[J].地质科学,2018,0(2):586-593. |
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| 作者姓名： | 郭瑞清 柴凤梅 韩春明 |
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| 作者单位： | 新疆大学地质与矿业工程学院 乌鲁木齐 830000;中国科学院矿产资源研究院重点实验室 北京 100029 |
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| 摘 要： | 兴地Ⅱ号铜镍矿床为岩浆多期次分异、侵位形成的基性-超基性杂岩体；本文通过对兴地辉长岩进行SIMS锆石U-Pb精确测年，获得206Pb/238U加权平均年龄为737±2 Ma，该数据表明兴地Ⅱ号杂岩体形成于南华纪，并非形成于中元古代。塔里木北缘广泛发育的碳酸岩、基性-超基性岩和双峰式火山岩，为Rodinia 超大陆长期的和持续的裂解产物。
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| 关 键 词： | 辉长岩 兴地Ⅱ号 SIMS锆石U-Pb Rodinia超大陆 |
| 收稿时间： | 2017-10-12 |
| 修稿时间： | 2017-10-12; |
SIMS zircon age of the Xingdi No.2 complex in the Kuluketage area and its geological implications |
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| Guo Ruiqing Chai Fengmei Han Chunming.SIMS zircon age of the Xingdi No.2 complex in the Kuluketage area and its geological implications[J].Chinese Journal of Geology,2018,0(2):586-593. |
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| Authors: | Guo Ruiqing Chai Fengmei Han Chunming |
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| Institution: | College of Geology and Mining Engineering, Xinjiang University, Urumqi 830000;Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The Xingdi No.2 complex is composed mainly of basic and partly of ultrabasic rocks. Copper and nickel mineralization occurs in both interior and exterior of the complex. A gabbro sample yielded a SIMS U-Pb zircon age of 737±2 Ma（MSWD = 0.038, 95% confidence level）, which indicates that the Xingdi complex formed during the Nanhua period rather than Mesoproterozoic time. A number of studies suggest that there were three episodes of mantleplume activities, at ca.830～800 Ma, 780～740 Ma and 650～630 Ma respecitively, during the break-up of supercontinent Rodinia within in the Tarim. The Xingdi intrusive suite formed in a Neoproterozoic continental rift setting, possibly related to mantle plume activities that led to the breakup of the Rodinia supercontinent. |
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| Keywords: | Zircon SIMS U-Pb dating Rodinian Xingdi Kuluketage |
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