OALib Journal期刊
念青唐古拉山西布冰川区的冰碛层
Keywords: 念青唐古拉 ,西布冰川 ,冰期 ,正断层 ,当雄羊八井盆地
Abstract:
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
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