| 格尔木－额济纳旗地学断面走廊域地壳－上地幔岩石学结构与深部过程 |
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| 引用本文： | 邓晋福,吴宗絮,杨建军,赵海玲,刘厚祥,赖绍聪,狄永军.格尔木－额济纳旗地学断面走廊域地壳－上地幔岩石学结构与深部过程[J].地球物理学报,1995,38(Z2):130-144. |
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| 作者姓名： | 邓晋福 吴宗絮 杨建军 赵海玲 刘厚祥 赖绍聪 狄永军 |
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| 作者单位： | 1. 中国地质大学, 北京 100083;
2. 国家地震局地质研究所, 北京 100029;
3. 中国地质科学院岩石圈研究中心, 北京 100037 |
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| 基金项目： | 国家自然科学基金;地质矿产部重点资助 |
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| 摘 要： | 基于岩石学研究与地球物理场的结合，提出了祁连山、柴达木与北山３个地区的壳幔岩石学结构．认为造山带加厚的下地壳与山根带分别由高压麻粒岩相与榴辉岩相岩石构成，对断面走廊域进行了岩石学填图．探讨了山根的形成与不对称、陆壳物质的分异与新莫霍界面的形成、造山岩石圈增厚机制、岩石围拆沉与玄武岩岩浆底侵作用等．讨论了青藏高原南、北缘岩石图增厚机制的差异及其岩石学标志．
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| 关 键 词： | 壳幔岩石学结构 山根 深部过程 格尔木－额济纳旗 |
| 收稿时间： | 1994-10-21 |
CRUST-MANTLE PETROLOGICAL STRUCTURE AND DEEP PROCESSES ALONG THE GOLMUD-EJIN QI GEOSCIENCE SECTION |
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| DENG JIN-FU,WU ZONG-XU,YANG JIAN-JUN,ZHAO HAI-LING,LIU HOU-XIANG,LAI SHAO-CONG,DI YONG-JUN.CRUST-MANTLE PETROLOGICAL STRUCTURE AND DEEP PROCESSES ALONG THE GOLMUD-EJIN QI GEOSCIENCE SECTION[J].Chinese Journal of Geophysics,1995,38(Z2):130-144. |
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| Authors: | DENG JIN-FU WU ZONG-XU YANG JIAN-JUN ZHAO HAI-LING LIU HOU-XIANG LAI SHAO-CONG DI YONG-JUN |
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| Institution: | 1. Departmene of Geology, China University of Geosciences, Beijing 100083;
2. Insititue of Geology, State Seismological Bureau, Beijing 100029;
3. Lithospheric Research, Chinese Academy of Geological sciences, Beijing 100037 |
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| Abstract: | Based on the petrological study and the geophysical results, this paper suggests the crust-mantle Petrological structure of three regions of Qilianshan, Qaidam and Beishan. The thickened lower crust and the mountain root consist of high-pressure granulite and eclogite facies rocks, respectively.Petrological mapping of the Golmud-Ejin Qi Geoscience Section has been carried out. The deep processes are discussed,including the formation and asymmetry of the mountain root, differentiation of the crust materials and the formation of the new Moho, the mechanism of the orogenic lithosphere thickening,the lithosphere delamination and basaltic magma underplating, and so on.The difference between the orogenic lithosphere thickening mechanisms of the northern and southern margins of the Qinhai-Xizang（Tibet）Plateau, and their petrological signature are also discussed. |
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