| 青藏高原拉萨地体南部的泥盆纪花岗岩 |
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| 引用本文： | 董昕,张泽明,耿官升,刘峰,王伟,于飞.青藏高原拉萨地体南部的泥盆纪花岗岩[J].岩石学报,2010,26(7):2226-2232. |
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| 作者姓名： | 董昕 张泽明 耿官升 刘峰 王伟 于飞 |
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| 作者单位： | 1. 中国地质科学院地质研究所,北京,100037
2. 中国地质大学(武汉)地球科学学院,武汉,430074 |
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| 基金项目： | 中国地质调查局地质调查工作项目（1212010918012）、国家自然科学基金项目（40921001、40772049和40972055）和中国地质大学地质过程与矿产资源国家重点实验室开放课题（GPMR200907） |
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| 摘 要： | 位于青藏高原南部的拉萨地体经历了强烈的中、新生代造山作用,以及最近确定的晚古生代至早中生代的造山作用,而本文第一次报道了拉萨地体南部所经历的中古生代岩浆热事件。所研究的花岗岩分布于拉萨地体南部的加查附近,主要由斜长石、石英、钾长石和少量黑云母组成,经历了不同程度的塑性变形,呈片麻状或眼球状构造。花岗岩中的锆石具有典型的岩浆结晶成因特征,获得了366.7±2.5Ma的谐和年龄。这一成果为拉萨地体的起源、构造归属以及早期构造演化提供了重要信息。
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| 关 键 词： | 泥盆纪花岗岩 年代学 构造演化 拉萨地体 青藏高原 |
| 收稿时间： | 4/1/2010 12:00:00 AM |
| 修稿时间： | 2010/6/21 0:00:00 |
Devonian magmatism from the southern Lhasa terrane, Tibetan Plateau |
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| DONG Xin,ZHANG ZeMing,GENG GuanSheng,LIU Feng,WANG Wei and YU Fei.Devonian magmatism from the southern Lhasa terrane, Tibetan Plateau[J].Acta Petrologica Sinica,2010,26(7):2226-2232. |
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| Authors: | DONG Xin ZHANG ZeMing GENG GuanSheng LIU Feng WANG Wei and YU Fei |
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| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China;Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China;Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China |
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| Abstract: | Previous investigations have demonstrated that the Lhasa terrane located at South Tibet have experienced the multi-stages of orogenesis during Cenozoic, Mesozoic and Late Paleozoic. However, the present paper firstly reports a Middle Paleozoic magmatic event generated in the southern Lhasa terrane. The studied granite occurs nearby Jiacha County, consists mainly of plagioclase, quartz, K-feldspar and a minor biotite, and shows gneissic or augen structure, indicating variable degrees of ductile deformation. Zircons from granite are typical of magmatic crystallization, and yield a U-Pb concordant age of 366.7±2.5Ma. This result provides an important constraint on the origin, tectonic affinity and early tectonic evolution of the Lhasa terrane. |
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| Keywords: | Devonian granite Geochronology Tectonic evolution Lhasa terrane Tibetan Plateau |
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