| 西昆仑及邻区岩石圈结构构造演化——塔里木南—西昆仑多学科地学断面简要报道 |
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| 引用本文： | 肖序常,刘训,高锐,罗照华.西昆仑及邻区岩石圈结构构造演化——塔里木南—西昆仑多学科地学断面简要报道[J].地质通报,2002,21(2). |
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| 作者姓名： | 肖序常 刘训 高锐 罗照华 |
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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,北京,100083 |
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| 基金项目： | 新疆305—07—03项目部分成果，国土资源部地调局、国际—科技合作司、国家自然科学基金委资助，新疆305项办资助 |
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| 摘 要： | 通过深地震反射剖面,宽频天然深地震探测,广角折射、反射剖面,结合地表地质观察、岩石矿物和地球化学研究,以及弹性模拟计算等,对当前国际上流行的所谓高原北缘向南呈A型俯冲,南缘向北俯冲构成的青藏高原地壳加厚、隆升的“双俯冲”(two-sidedsubduction)模式提出质疑,认为高原北缘至少在西昆仑与塔里木(欧亚板块)之间不存在长距离的俯冲,在新生代以来的强劲挤压中,塔里木起到了一定的阻挡作用,在这里呈现南北向挤压应力场,因而青藏高原西北缘陆-陆碰撞造山、盆山的形成受到“南北双向挤压模式”所控制,也是造成青藏高原西北缘新生代期地壳加厚、隆升的重要动力因素
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| 关 键 词： | 西昆仑 地学断面 岩石圈 构造演化 |
Lithospheric structure and tectonic evolution of the West Kunlun and Its adjacent areas-Brief report on the South Tarim-West Kunlun Multidisciplinary geoscience transect |
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| Xiao Xuchang Liu Xun Gao Rui,and Luo Zhaohua.Lithospheric structure and tectonic evolution of the West Kunlun and Its adjacent areas-Brief report on the South Tarim-West Kunlun Multidisciplinary geoscience transect[J].Geologcal Bulletin OF China,2002,21(2). |
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| Authors: | Xiao Xuchang Liu Xun Gao Rui and Luo Zhaohua |
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| Abstract: | Results from deep seismic reflection profiling,broadband deep seismic sounding and wide-angle reflection-refraction profiling,combined with surface geological observations ,petrological,mineralogical and geochemical studies and elastic model calculation,question the currently prevalent "two-sided subduction model"which suggests that the crustal thickening and uplift of the Qinghai-Tibet Plateau resulted from the southward A-subduction of the northern margin of the plateau and the northward subduction of its southern margin.The authors think that no long-distance subduction took place at least between the West Kunlun and Tarim(the Eurasian plate)on the northern margin of the plateau.Tarim only played a cer-tain role in resisting the pressure from the south since the Cenozoic and there a N-S compressional stress appeared.Therefore the continent-continent collisional orogeny and formation of the basin-and-range structure were controlled by the"oppositely directed N-S compression model",and the N-S compression in opposite directions is also an important dynamic factor for the crustal thickening and uplift on the northwestern margin of the plateau in the late Cenozoic. |
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| Keywords: | West Kunlun geoscience transect lithosphere tectonic evolution |
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