藏东南帕龙藏布流域索通平台第四纪堆积体成因  

The Suotong Platform Genetic Analysis of Quaternary Sediments of Parklon Zangbo River Basin in the South-Eastern Margin of the Qinghai-Tibet Plateau

作　　者：邹任洲 张佳佳 刘健康 王军朝[2] 李勇[1] 黄亮[1] 田海 ZOU Renzhou;ZHANG Jiajia;LIU Jiankang;WANG Junchao;LI Yong;HUANG Liang;TIAN Hai(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, Sichuan;Institute of Exploration Technology, China Geological Survey, Chengdu 611734, Sichuan)

机构地区：[1]成都理工大学油气藏地质及开发工程国家重点实验室,四川成都610059 [2]中国地质调查局探矿工艺研究所,四川成都611734

出　　处：《四川师范大学学报（自然科学版）》2018年第4期551-559,共9页Journal of Sichuan Normal University（Natural Science）

基　　金：国家自然科学基金(41172162和41372114);青年科学基金(41502116);国土资源部地质调查项目(12120115004501-01);中国地质调查局地质调查项目(DD20160279)

摘　　要：青藏高原被称为世界屋脊,第四纪地貌发育良好,是第四纪地貌学研究的良好野外素材.位于青藏高原东南缘的帕龙藏布流域是雅鲁藏布的一级支流,沿岸堆积多种成因的第四纪堆积物,主要包括冰碛物、河流阶地、泥石流堆积物和崩滑堆积.通过无人机航拍、高精度遥感影像、野外实测剖面、钻孔岩心和物探对索通平台第四纪堆积物成因进行详细的分析,得出以下结论:1)索通平台第四纪堆积体最初是由第四纪冰川作用形成的冰碛平台;2)后期冰碛平台外侧边缘受帕龙藏布改造形成现今的五级阶地;3)对冰碛平台边缘外侧阶地沉积物的沉积构造、阶地类型和陡坎高度分析表明,阶地成因主要为气候变化和构造的共同作用.Quaternary geomorphology in Qinghai-Tibet plateau,known as the roof of the world,are good materials in the field of quaternary geomorphology research,Parklon Zangbo river basin in the South-Eastern margin of the Qinghai-Tibet plateau is tributary of the Yarlung Zangbo river basin,where quaternary sediments of various origins accumulate along the coast,mainly including moraines,river terraces,debris flow deposits and collapse accumulation. Through unmanned aerial photography,high precision remote sensing image,field measured profile,drilling core and geophysical prospecting,we analyze the genesis of the quaternary sediments of the Suotong platform and come to the following conclusions： 1） the quaternary sediments of the Suotong platform were originally formed by the quaternary glaciation; 2） the outer edge of the later moraine platform was transformed by Parklon Zangbo to form the present five terraces; 3） analysis to sedimentary structure,types of terraces and scarp height of the sediments on the lateral terrane terrace edge indicate that the terraces are mainly formed by climate change and the tectonic effect.

关 键 词：青藏高原 第四纪堆积物 河流阶地 冰碛物 

分 类 号：P56[天文地球—构造地质学]