| 广东阳春锡山钨锡矿床成岩成矿年代学研究 |
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| 引用本文： | 梅玉萍,杨红梅,段瑞春,张利国,蔡应雄,童喜润,谭娟娟,刘重芃,卢山松.广东阳春锡山钨锡矿床成岩成矿年代学研究[J].地质学报,2013,87(9):1370-1376. |
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| 作者姓名： | 梅玉萍 杨红梅 段瑞春 张利国 蔡应雄 童喜润 谭娟娟 刘重芃 卢山松 |
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| 作者单位： | 中国地质调查局武汉地质调查中心同位素地球化学实验室,武汉,430223 |
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| 基金项目： | 中国地质大调查项目(编号1212011121102)资助成果 |
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| 摘 要： | 为了精确厘定锡山钨锡矿床成岩成矿时代,本文分别对锡山岩体斑状二长花岗岩和矿体开展了锆石LA-ICP-MS U-Pb和石英Rb-Sr年代学研究,获得的锆石U-Pb年龄为103±3Ma,石英矿物Rb-Sr等时线年龄为94±12Ma,两者在测定误差内一致,表明锡山岩体晚阶段形成的花岗岩在时间和空间上与成矿作用有明显的耦合关系,其成岩成矿作用发生在早白垩世晚期。锡山成岩成矿的动力学背景应与早白垩世晚期南岭地区的岩石圈伸展拉张引发的大规模岩浆活动有关。
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| 关 键 词： | 阳春盆地 锡山 成岩成矿 年代学 |
| 收稿时间： | 5/1/2013 12:00:00 AM |
| 修稿时间： | 8/7/2013 12:00:00 AM |
Study on the geochronology of Yangchun W-Sn mineral deposit, Guangdong |
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| MEI Yuping and YANG Hongmei,DUAN Ruichun,ZHANG Liguo,CAI Yingxiong,TONG Xirun,TAN Juanjuan,LIU Chongpeng,LU Shansong.Study on the geochronology of Yangchun W-Sn mineral deposit, Guangdong[J].Acta Geologica Sinica,2013,87(9):1370-1376. |
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| Authors: | MEI Yuping and YANG Hongmei DUAN Ruichun ZHANG Liguo CAI Yingxiong TONG Xirun TAN Juanjuan LIU Chongpeng LU Shansong |
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| Institution: | Wuhan Center of China Geology Survey |
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| Abstract: | This study carries on zircon U-Pb dating in LA-ICP-MS and Rb-Sr dating in quartz samples from porphyritic monzonitic granite and ore body in Xishan block, so to determine the formation time of Xishan W-Sn deposit and the wall rocks. The yielded zircon U-Pb age is 103±3Ma, and the quartz Rb-Sr iscochron plots give an age of 93±11Ma, which are identical within the margin of error. This indicates a coupled relationship in time and space between late-stage granite and deposits in Xishan block, which occurred during Late Cretaceous. The tectonic setting of Xishan block and deposits may be related to the voluminous magmatic activities caused by the extension of lithosphere in Nanling region in Late Cretaceous. |
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| Keywords: | Yangchun Basin Xishan diagenesis and mineralization geochronology |
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