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青藏高原东缘第四纪地质与环境调查的新进展

发表时间:2008-01-15  浏览量:1881  下载量:852
全部作者: 赵志中,王书兵,乔彦松,姚海涛,王燕,李朝柱,傅建利,刘宗秀,蒋复初
作者单位: 中国地质科学院地质力学研究所
摘 要: 青藏高原东缘地区发育了完整的晚新生代湖相、黄土、红土和冰川沉积系列,不同成因的沉积物记录了晚新生代以来古环境时空变迁信息。上新世昔格达湖相沉积发育于4.2-2.6MaB.P.,具有9个冷-暖气候环境变化阶段。川西风尘堆积始于1.15MaB.P.,连续记录了14个古季风变化旋回,成都平原红土记录了1.13Ma来的5个古环境演化阶段。青藏高原东缘发育了约4.3MaB.P.的老冰期,第四纪时期出现了五次极端古气候事件,对应为五期冰期。
关 键 词: 第四纪地质学;昔格达湖相;川西黄土;成都红土;第四纪冰川
Title: Quaternary geology and paleoenvironment in the eastern Qinghai-Xizang plateau
Author: ZHAO Zhizhong, WANG Shubin, QIAO Yansong,YAO Haitao, WANG Yan, LI Chaozhu, FU Jianli, LIU Zongxiu, JIANG Fuchu
Organization: Institute of Geomechanics, CAGS
Abstract: There are late Cenozoic lacustrine and loess and red clay and moraines in the eastern Qinghai-Xizang plateau. Different genetic sediments recorded rich information of Quaternary palaeoenvironment change. Xigeda lacustrine in Pliocene formed from 4.2 MaB.P. to 2.6 MaB.P..There were nice stages from warm to cold with periodic rhythm. Eolian is widespreaded in the western Sichuan, and began 1.15MaB.P.. The loess-soil sequence recorded fourteen cycles of paleomosoon. Red clay in Chengdu basin recorded five stages of paleoclimatic change since 1.13 MaB.P.. There was an old glaciation 4.3Ma B.P.in the eastern Qinghai-Xizang plateau. During Quaternary, there are five extreme paleoclimatic events corresponding with five glaciations.
Key words: quaternary geology; Xigeda lacustrine deposits; Loess in western Sichuan; Chengdu red clay; Quaternary glacier
发表期数: 2008年5月第1期
引用格式: 赵志中,王书兵,乔彦松,等. 青藏高原东缘第四纪地质与环境调查的新进展[J]. 中国科技论文在线精品论文,2008,1(1):1-8.
 
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