Quaternary integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas  

作　　者：Yong WANG Mianping ZHENG Yuan LING Shuyuan XIANG Zhaogang SHAO Kexin ZHANG Xue KE Xiao LIN Fang HAN Jian’en HAN 

机构地区：[1]Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China [2]Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China [3]Faculty of Earth Sciences,China University of Geosciences,Wuhan 430074,China [4]Chinese Academy of Geological Sciences,Beijing 100037,China [5]Institute of Geological Survey,China University of Geosciences,Wuhan 430074,China [6]School of Earth Sciences,East China University of Technology,Nanchang 330013,China [7]Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China

出　　处：《Science China Earth Sciences》2024年第4期1360-1394,共35页中国科学（地球科学英文版）

基　　金：supported by the China Geological Survey(Grant Nos.DD20221645,DD20221648,DD20190370);the National Natural Science Foundation of China(Grant No.91962219)。

摘　　要：The Quaternary strata on the Qinghai-Tibet Plateau contain rich information about the paleoclimate and environmental evolution,record the evolution process of the Quaternary regional tectonics,paleogeography,and geomorphology of the plateau,and are extremely important areas for studying the Quaternary geological events and regional environmental evolution.According to a comprehensive analysis of the regional stratigraphic data and the development and evolution characteristics of the biota,based on the differences in the lithostratigraphic units,sedimentary characteristics,landforms,and drainage systems,the Quaternary strata on the Qinghai-Tibet Plateau and its surrounding areas are divided into five stratigraphic regions:the Tarim region,Loess Plateau region,Qinghai-Tibet Plateau region,Yunnan-Guizhou Plateau region,and India-Ganges region.The Qinghai-Tibet Plateau stratigraphic region is divided into seven stratigraphic sub-regions:the West Kunlun-Karakorum,AltunQilian Mountains,Qaidam-Hehuang,East Kunlun-Bayan Har,Qiangtang,East Xizang-West Yunnan-West Sichuan,and Gangdise-Himalayan sub-regions.This paper briefly describes the lithostratigraphic units of the seven stratigraphic sub-regions of the Qinghai-Tibet Plateau.According to the lithostratigraphic sequence and its sedimentary characteristics,stratigraphic contact relationship,formation age,and evolution of the biota in each stratigraphic sub-region,the Quaternary tectonic paleogeographic evolution of the Qinghai-Tibet Plateau is divided into four stages.(1)The inherited differential uplift stage since the Pliocene(2.6-1.8/1.5 Ma):the regional sedimentary differences were significant,and the stratigraphic distribution was limited,the alluvial-proluvial sandy conglomerate was widely developed along the piedmont,and fluvial and lacustrine deposits were developed in the low-lying areas between the mountains.(2)The mountain range flattening stage(1.8/1.5-1.2/0.8 Ma):the erosion unconformity surfaces around the plateau were widely distributed,large rivers were

关 键 词：QUATERNARY STRATIGRAPHIC SEDIMENTARY 

分 类 号：P534.63[天文地球—第四纪地质学] P535[天文地球—古生物学与地层学] Q911[天文地球—地质学]