| 柴达木盆地东部基底花岗岩类岩浆活动的化学地球动力学 |
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| 引用本文： | 陈宣华.柴达木盆地东部基底花岗岩类岩浆活动的化学地球动力学[J].地质学报,2011,85(2):157-171. |
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| 作者姓名： | 陈宣华 |
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| 作者单位： | 中国地质科学院地质力学研究所 |
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| 基金项目： | 国家自然科学基金项目（面上项目） |
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| 摘 要： | 柴达木盆地东部是连接秦岭、祁连、昆仑三大造山带的关键构造部位,发育了以晚二叠世-中三叠世(P-T)花岗岩类为主的古特提斯域深成岩浆活动.岩石地球化学分析表明,柴达木盆地东部基底P-T花岗岩类形成于大洋环境,主要为I型花岗岩类.该期花岗岩类可分为两个时间演化系列,早期为钾长花岗岩-花岗闪长岩-英云闪长岩-闪长岩系列,晚期...
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| 关 键 词： | 化学地球动力学 深成岩浆活动 二叠纪-三叠纪 柴达木盆地东部 秦-祁-昆接合带 |
| 收稿时间： | 2010/5/17 0:00:00 |
| 修稿时间： | 2010/11/12 0:00:00 |
Chemical Geodynamics of Granitic Magmatism in the Basement of the Eastern Qaidam Basin, Northern Qinghai-Tibet Plateau |
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| Chen Xuanhua.Chemical Geodynamics of Granitic Magmatism in the Basement of the Eastern Qaidam Basin, Northern Qinghai-Tibet Plateau[J].Acta Geologica Sinica,2011,85(2):157-171. |
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| Authors: | Chen Xuanhua |
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| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences |
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| Abstract: | The eastern margin of the Qaidam Basin lies in a key tectonic location connecting the Qinling,Qilian and Kunlun orogens.The Permian Triassic(P-T)I-type granitoids in the basement of the eastern Qaidam Basin are parts of the intrusive magmatism of the Paleo-Tethyan orogeny formed in ocean environment.Lithogeochemical analyses,combined with previous LA ICP-MS zircon U-Pb dating,reveal two time series of P-T granitoids.The early series is composed of K-feldspar granites,granodiorites,tonalities,and diorites,an... |
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| Keywords: | chemical geodynamics intrusive magmatism Permian-Triassic eastern Qaidam Basin joint zone of the Qinling-Qilian-Kunlun orogens |
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