地理科学 ›› 2004, Vol. 24 ›› Issue (3): 292-297.doi: 10.13249/j.cnki.sgs.2004.03.292

• 论文 • 上一篇    下一篇

山西南部1.2 Ma B.P.的地貌转型事件

李有利, 史兴民, 傅建利, 杨景春   

  1. 北京大学地理科学研究中心地表过程分析与模拟教育部重点实验室, 北京 100871
  • 收稿日期:2003-08-11 修回日期:2003-12-14 出版日期:2004-05-20 发布日期:2004-05-20
  • 基金资助:
    国家自然科学基金(40071016)。

Geomorphic Transformational Event Around 1.2 Ma B.P. in the Southern Shanxi Province

LI You-Li, SHI Xing-Min, FU Jian-Li, Yang Jing-Chun   

  1. MOE Laboratary for Earth Surface Processes and Research Center for Geographic Sciences, Peking University, Beijing 100871
  • Received:2003-08-11 Revised:2003-12-14 Online:2004-05-20 Published:2004-05-20

摘要: 研究山西南部柴庄剖面和杨范剖面上部的黄土地层的磁化率、古地磁、黄土古土壤序列,发现这两个剖面记录了发生于120×104 a B.P.的由河流湖泊环境转变为黄土环境的转型事件。分析沉积环境和构造背景,认为这次事件是山西地堑系盆地间横向隆起发生强烈构造抬升的结果,可能与青藏高原的隆起对本地区的影响有关。

Abstract: Based on the studies of magnetic susceptibility, paleomagnetism and loess-paleosol sequence of the Chaizhuang and Yangfan sections in the southern Shanxi Province, it is suggested that these sections documented a geomorphic transformation from fluvial environment to the loess environment around 1.2 Ma B. P. Combining with the analyses of the sedimentary environment and tectonic background, we proposed that this event is likely the result of the uplift of the transverse horsts, the Chaizhuang horst between the Linfen and Houma basins, the Emeitai horst between the Houma and Yuncheng basins, in the Shanxi graben system which probably linked with the tectonic movement in the Tibet Plateau.

中图分类号: 

  • P931.2