地球科学进展 ›› 2011, Vol. 26 ›› Issue (12): 1276 -1281. doi: 10.11867/j.issn.1001-8166.2011.12.1276

研究论文 上一篇    下一篇

武都汉林沟流域古滑坡年龄的 14C厘定
吴玮江 1,叶伟林 1,孟兴民 2,王宗礼 2   
  1. 1.甘肃省科学院地质自然灾害防治研究所,甘肃兰州730000;2.兰州大学,甘肃兰州730000
  • 收稿日期:2011-05-25 修回日期:2011-09-28 出版日期:2011-12-10
  • 通讯作者: 吴玮江(1963-),男,甘肃天水人,研究员,主要从事滑坡、泥石流等地质灾害防治研究.  E-mail:wwj0408@163.com
  • 基金资助:

    甘肃省科学院应用技术研究与开发计划项目“甘肃易滑坡地层的工程地质性质研究”(编号:2008-YS-JK-14);教育部西部灾害与环境力学重点实验室开放基金项目“陇南、甘南易滑坡地层强度特征研究”(编号:klmwde201004) 资助.

The Definition of the Ancient Landslide Age with the 14C Dating of Hanlingou River Basin in Wudu

Wu Weijiang 1, Ye Weilin 1, Meng Xingmin 2, Wang Zongli 2   

  1. 1. Geological Hazards Institute, Gansu Academy of Sciences, Lanzhou730000, China; 2. Lanzhou University, Lanzhou730000, China
  • Received:2011-05-25 Revised:2011-09-28 Online:2011-12-10 Published:2011-12-10

古滑坡一般是指全新世以前地质历史时期发生的滑坡。武都汉林沟流域发育有第四纪晚更新世以来不同时期的滑坡,具有规模大、数量多的特点,为武都白龙江中游滑坡发育历史研究提供了典型实例。通过滑坡体的形貌、结构特征、与其他地层的接触关系分析,确定古滑坡的存在。同时也发现古滑坡曾堵塞汉林沟形成堰塞湖,并压埋了许多古树木,古滑体中残留大量植物遗骸,通过14C测定,进一步确定汉林沟流域古滑坡形成时间为42.0~44.8 ka BP。

The ancient landslides were usually formed in the period of earth evolvement before Holocene. Landslides of Hanlingou River Basin grew well in the different periods during the Epipleistocene and  their characteristics present as being on a large scale and in large quantity. It gives several typical examples to study the development of landslides of the middle reach of the Bailongjiang  River  in Wudu. The ancient landslides grew well by analysis of  the topography and characteristics of structure of landslide and contact relations of strata. The research results also show that the water resources from Hanlingou was cut off to form barrier lakes by earthquake and many old trees were  buried. Now, a large number of the remains of plants remain in the landslides. According to the 14C dating from the root of a tree, the ancient landslides grew about 42.0~44.8 ka BP.

中图分类号: 

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[1] 张永双, 吴瑞安, 郭长宝, 王立朝, 姚鑫, 杨志华. 古滑坡复活问题研究进展与展望[J]. 地球科学进展, 2018, 33(7): 728-740.
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