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| 东昆仑造山带白日其利辉长岩体LA-ICP-MS锆石U-Pb年龄及地质意义 | |
| 引用本文： | 熊富浩,马昌前,张金阳,刘彬,蒋红安,黄坚.东昆仑造山带白日其利辉长岩体LA-ICP-MS锆石U-Pb年龄及地质意义[J].地质通报,2011,30(8):1196-1202. |
| 作者姓名： | 熊富浩 马昌前 张金阳 刘彬 蒋红安 黄坚 |
| 作者单位： | 1. 中国地质大学地球科学学院,湖北武汉,430074 2. 中国地质大学地球科学学院,湖北武汉 430074;中国地质大学/地质过程与矿产资源国家重点实验室,湖北武汉 430074 3. 中国地质大学资源学院,湖北武汉,430074 |
| 基金项目： | 中国地质调查局计划项目《青藏高原大陆动力学及资源环境效应之工作13》 |
| 摘 要： | 东昆仑中段的白日其利基性岩体由橄榄辉长岩、斜长岩和角闪辉长岩组成.主体岩相角闪辉长岩的锆石LA-ICP-MSU-Pb年龄表明,其侵位于248.9Ma+4.2Ma,为早三叠世阿尼玛卿古特提斯洋关闭过程中的岩浆活动.结合前人的研究,认为东昆仑造山带中生代岩浆混合作用至少始于早三叠世,白日其利岩体为研究俯冲阶段岩浆混合作用提... |
| 关 键 词： | 东昆仑造山带 白日其利岩体 辉长岩 LA-ICP-MS锆石U-Pb年龄 前寒武纪地质 |
Zircon LA-ICP-MS U-Pb dating of Bairiqili gabbro pluton in East Kunlun orogenic belt and its geological significance |
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| XIONG Fu-hao,Chang-qian,ZHANG Jin-yang,LIU Bin,JIANG Hong-an,HUANG Jian.Zircon LA-ICP-MS U-Pb dating of Bairiqili gabbro pluton in East Kunlun orogenic belt and its geological significance[J].Geologcal Bulletin OF China,2011,30(8):1196-1202. | |
| Authors: | XIONG Fu-hao Chang-qian ZHANG Jin-yang LIU Bin JIANG Hong-an HUANG Jian |
| Institution: | 1. Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China; 2. State Key Laboratory of Geological Processes and Mineral Resources/China University of Geosciences, Wuhan 430074, Hubei, China; 3. Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, Hubei, China |
| Abstract: | Located in the middle of East Kunlun, the Bairiqili gabbro pluton consists of olivine gabbro, anorthosite and amphibolite gabbro. LA-ICP-MS zircon U-Pb dating suggests that the main facies hornblende gabbro intruded at 248.9 ± 4.2 Ma, being part of the Early Triassic magmatism during Paleo-Tethys ocean subduction. Based on previous researches, the authors hold that the Mesozoic magma mixing in the East Kunlun orogenic belt started at least in Early Triassic, and that the Bairiqili pluton provides a window for the study of magma mixing at the subduction stage in East Kunlun. Meanwhile, a large number of inherited zircon ages indicate that East Kunlun basement underwent multi-stage and polycyclic tectono-magma event in Precambrian, and the newly-discovered old age of 2109 ~ 2310 Ma may suggest that there existed another magmatic event in Early Proterozoic, whose geological significance deserves further researches. |
| Keywords: | East Kunlun orogenic belt Bairiqili pluton gabbro LA-ICP-MS zircon U-Pb dating Precambrian geology |
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