| 念青唐古拉山西布冰川区的冰碛层 |
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| 引用本文：吴中海,赵希涛,朱大岗,吴珍汉.2002.念青唐古拉山西布冰川区的冰碛层[J].地球学报,23(4):343-348. |
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| 基金项目:国土资源大调查项目“西藏纳木错地区第四纪环境演变调查研究”(编号:DKD2001006)，“西藏当雄幅1∶25万区域地质调查”(编号:DKD9901001) |
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| 中文摘要:念青唐古拉山西布冰川区冰碛物的研究表明，在700－500kaBP以来的更新世期间经达了3次冰期，全新世期间经历了2次冰期和1次寒冷期，形成了可以与青藏高原及邻区相对比的冰碛物系列，指示了念青唐古拉山至少自中更新世以来一直处于冰冻圈中。冰碛物中砾石成分的规律性变化反映了念青唐古拉山第四纪期间处于强烈隆升状态，冰碛物是盆地同伸展断陷期的堆积物。根据冰碛物与念青唐古位山南东麓正断层间的关系可以得出：中更新世以来构成念青唐古拉山南东麓正断层带的主要断层（F2）的平均垂直活动速率为0.5-1.25mm/a，左旋走滑 |
| 中文关键词:念青唐古拉 西布冰川 冰期 正断层 当雄羊八井盆地 |
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| The Moraines of Xibu Glacier Area in the Nyainqentanglha Range |
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| Abstract:The Nyainqentanglha Range moves in the NE (nearly EW) direction, and its main ridge is 6 000～7 000 m in elevation. Glacier activity was strong in Quaternary. According to Quaternary stratigraphic section, stratigraphic sequence, general geological configuration of the earth's surface and contact relationships, Three glacial epochs can be distinctly recognized in the middle part of the Nyainqentanglha Range, which are from old to young the Laqu glacial epoch Q 3,the Paranr glacial epoch Q 2～3 , and the Ningzhong glacial epoch Q 2～1 . The gravels in deposits of different glacial epochs and interglacial stages show obviously different rock characteristics, gravel forms, deposit thicknesses and weathering degrees. Discussions have also been made on such comparisons as the comparison of old glacial epoch with moraine layer, that of various interglacial stages and that of the glacial epochs in this area with those in other districts. |
| keywords:Nyaiqentanglha Range Xibu glaciers area glaciation normal fault Damxung-Yangbajain graben |
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