Late Cenozoic Geology and Paleo-environment Change in the Eastern Edge of Qinghai-Xizang Plateau

Late Cenozoic Geology and Paleo-environment Change in the Eastern Edge of Qinghai-Xizang

Plateau

ZHAO Zhizhong ;MIAO Qi;JIANG Fuchu;QIAO Yansong;WANG Shubing;YAO Haitao;WANG Yan;LI Chaozhu;FU Jianli;LIU Zongxiu;LI Mingze

【期刊名称】《地质学报（英文版）》 【年(卷),期】2008(082)005

【摘要】There are late Cenozoic lacustrine deposits and loess and red clay and moraines in eastern edge of the Qinghai-Xizang Plateau. Various genetic sediments recorded rich information on late Cenozoic paleo-environment changes. Xigeda lacustrine formed during 4.2 Ma B.P.-2.6 Ma B.P. There were 9 periodic warm-cold alternations. Eolian deposition in western Sichuan began at 1.15 Ma B.P. The loess-soil sequences recorded successively 14 paleo-monsoon climate cycles. Laterite in Chengdu plain recorded 5 stages of paleoclimatic stages since 1.13 Ma B.P. There was an old glacial period of 4.3 Ma B.P. In eastern Qinghai-Xizang Plateau. During Quaternary, there are 5 extreme paleoclimatic events corresponding with 5 glaciations. 【总页数】8页(959-966)

【关键词】Qinghai-Xizang Plateau;Xigeda lacustrine;Loess in western Sichuan;Chengdu laterite;Quaternary glaciations

【作者】ZHAO Zhizhong ;MIAO Qi;JIANG Fuchu;QIAO Yansong;WANG