Pleistocene magnetic susceptibility and paleomagnetism of the Tibetan loess and its implications on large climatic change events  

作　　者：颜茂都 方小敏 陈诗越 杨胜利 吕连清 李吉均 安芷生 

出　　处：《Science China Earth Sciences》2001年第S1期227-232,共6页中国科学（地球科学英文版）

基　　金：the NationalNatural Science Foundation of China (Grant No. 49928101), the Hundred Talents Project of CAS (Grant No. [2000] 005) and the National Key Project for Basic Research on the Tibetan Plateau (Grant No. G1998040809).

摘　　要：Ganzi loess represents the oldest Tibetan loess, its formation is the key to determining the readjustment of Tibetan atmospheric circulation and the relationship between Tibetan uplift and global climatic change. Detailed magnetostratigraphic study shows that the Ganzi loess was formed at about 1.13 MaBP. It also reveals that there are two notable climatic events occurring in 0.95-0.92 Ma and 0.65-0.5 Ma respectively. They both demonstrate that the Tibetan atmospheric circulation was readjusted and the Tibetan Plateau entered the cryosphere at 21.13 Ma, and the Tibetan glaciation might reach its maximum at ~ 0.65-0.5 Ma.Ganzi loess represents the oldest Tibetan loess, its formation is the key to determining the readjustment of Tibetan atmospheric circulation and the relationship between Tibetan uplift and global climatic change. Detailed magnetostratigraphic study shows that the Ganzi loess was formed at about 1.13 MaBP. It also reveals that there are two notable climatic events occurring in 0.95-0.92 Ma and 0.65-0.5 Ma respectively. They both demonstrate that the Tibetan atmospheric circulation was readjusted and the Tibetan Plateau entered the cryosphere at 21.13 Ma, and the Tibetan glaciation might reach its maximum at - 0.65-0.5 Ma.

关 键 词：: TIBETAN Plateau LOESS UPLIFT atmospheric circulation CLIMATIC change. 

分 类 号：P532[天文地球—古生物学与地层学]