青藏高原中南部我国内、外流流域分水岭的东向迁移与“那曲运动”
孙延贵, 张焜, 余景晖, 马世斌
青海省地质调查院,西宁810012
Eastward Migration of the Watershed of Inflow and Outflow Rives in the Mid-southern Qinghai-Tibet Plateau and the “Nagqu Movement”
SUN Yan-Gui, ZHANG Kun, YU Jing-Hui, MA Shi-Bin
Institute of Geological Survey of Qinghai Province, Xining 810012, China
摘要 介绍了自2003年以来,利用遥感技术结合实地验证工作在青藏高原第四纪地质调查研究中取得的成果。我国现今内、外流流域分水岭
在青藏高原中南部的位置形成于全新世初,即发生于晚更新世末(约0.01 Ma)的“那曲运动”是致使其形成的一次非常重要的地壳运动。那
曲运动前,内、外流流域分水岭位于当惹雍错一带,该次新构造运动使分水岭向东迁移约500 km,造成原属于怒江源区的色林错、纳木错等
广大区域转化为内陆盆地。基于青藏高原中南部第四纪地质,特别是晚更新世以来古河道空间展布特征的遥感调查结果,结合上更新统与全
新统之间的高角度不整合面所显示出的那曲运动基本特征,对上述规律进行了较为系统的论述。
关键词 :
遥感信息 ,
湖面扩大 ,
动态监测 ,
活动构造 ,
西藏
Abstract :Making use of the remote sensing technique and field survey, the authors have studied the Quaternary geology of
the Qinghai-Tibet Plateau since 2003, and the results indicate that the watershed of China’s inflow rivers and outflow
rivers in the mid-southern Qinghai-Tibet Plateau was formed in early Holocene. The Nagqu Movement that occurred at the last
stage of late Pleistocene was an important crust movement forming the dividing range. The remote sensing survey also
discovered that the dividing range was situated in the Tangra Yumco area. The crust movement resulted in eastward migration
of the watershed for 500 km, and the early riverhead area of the Nujiang River consisting of the Siling Co and Namo Co
lakes became inland basins. Based on the results of the remote sensing survey of the Quaternary geology which mainly
include the fossil river courses, the angular unconformity between Pleistocene and Holocene and the Nagqu movement in the
mid-southern Qinghai-Tibet Plateau, this paper deals systematically with these phenomena and regularities.
Key words :
Information of remote sensing
The enlargement of lake
Dynamic monitoring
Active structure
Tibet
收稿日期: 2010-04-02
出版日期: 2010-11-13
通讯作者:
孙延贵(1959-),男,博士,教授级高工,主要研究方向为构造地质及地质矿产遥感技术应用。
引用本文:
孙延贵, 张焜, 余景晖, 马世斌. 青藏高原中南部我国内、外流流域分水岭的东向迁移与“那曲运动”[J]. 国土资源遥感, 2010, 22(s1): 64-68.
SUN Yan-Gui, ZHANG Kun, YU Jing-Hui, MA Shi-Bin. Eastward Migration of the Watershed of Inflow and Outflow Rives in the Mid-southern Qinghai-Tibet Plateau and the “Nagqu Movement”. REMOTE SENSING FOR LAND & RESOURCES, 2010, 22(s1): 64-68.
链接本文:
https://www.gtzyyg.com/CN/10.6046/gtzyyg.2010.s1.15
或
https://www.gtzyyg.com/CN/Y2010/V22/Is1/64
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