印度季风演化在中国川西高原碳酸盐记录上的反映  

Carbonate Records of Indian Monsoon′s Evolution on the Western Sichuan Plateau

作　　者：陈秀玲[1,2] 杨胜利[2] 吴福莉[2] 张文开[1] 

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]中国科学院青藏高原研究所,北京100085

出　　处：《亚热带资源与环境学报》2008年第3期7-11,共5页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金资助项目(40121303;40334038);福建省重点资助项目(2006I0014)

摘　　要：通过分析甘孜黄土1.15 Ma以来的高分辨率碳酸盐记录,发现0.65 Ma以前川西地区受到印度季风强烈稳定的影响,降水丰沛,气候湿润;0.65 Ma以后,尤其是0.50 Ma以后印度季风对该地区的影响开始逐步减弱,气候开始向干旱化方向发展.Eolian deposit is widely distributed on the western Sichuan Plateau. In this paper,high-resolution records about carbonate contents from a 1.15 Ma toess-paleosol sequence at Ganzi are measured. The result shows that, before 0.65 Ma, the climate on western Sichuan area was moist and rich in precipitation, implying a strong and stable influence from Indian monsoon. However, after the time, especially after 0. 5 Ma, the influence began to weaken and the climate of the area gradually changed into arid.

关 键 词：川西高原 甘孜黄土 碳酸盐 印度季风 

分 类 号：P534.63[天文地球—第四纪地质学]