汾渭地堑盆地第四纪中晚期阶段性演化时间序次差异及其构造指示意义（英文）

发布时间：2019-03-14 20:09

【摘要】：There are a series of basins in the Fenwei Graben.Field survey found that there took place several paleolake regressions or intensive stream down-incisions in all basins during the Mid-Late Quaternary.The lowest and oldest paleosol/loess units overlying three of the lacustrine terraces or alluvial ones and some paleomagenetism data from the lacustrine sediment indicate that the onset times of three paleolake regressions or intensive stream down-incisions are synchronous with the formation of L_9,L_6 and L_2 respectively in the Weihe Basin,S_8,S_5 and S_1 respectively in the Linfen-Taiyuan-Xingding Basins,and L_8,L_5 and L_1 respectively in the Datong Basin.The difference in the onset time of each lake regressions or intensive stream down-incision in different basins reveals that the farther the basin is from the Tibetan Plateau,the later it took place.Taking these field facts and the former research results in terms of the regional tectonic movement into account,it is inferred that the tectonic movement of the Tibetan Plateau most probably controlled such geomorphological-sedimentary evolution in the graben.
[Abstract]:There are a series of basins in the Fenwei Graben.Field survey found that there took place several paleolake regressions or intensive stream down-incisions in all basins during the Mid-Late Quaternary.The lowest and oldest paleosol/loess units overlying three of the lacustrine terraces or alluvial ones and some paleomagenetism data from the lacustrine sediment indicate that the onset times of three paleolake regressions or intensive stream down-incisions are synchronous with the formation of L_9,L_6 and L_2 respectively in the Weihe Basin,S_8,S_5 and S_1 respectively in the Linfen-Taiyuan-Xingding Basins,and L_8,L_5 and L_1 respectively in the Datong Basin.The difference in the onset time of each lake regressions or intensive stream down-incision in different basins reveals that the farther the basin is from the Tibetan Plateau,the later it took place.Taking these field facts and the former research results in terms of the regional tectonic movement into account,it is inferred that the tectonic movement of the Tibetan Plateau most probably controlled such geomorphological-sedimentary evolution in the graben.
【作者单位】： Geography
【基金】：National Natural Science Foundation of China,No.41371021
【分类号】：P534.63;P542

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