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Late Cenozoic Geology and Paleo‐environment Change in the Eastern Edge of Qinghai‐Xizang Plateau
Author(s) -
Zhizhong ZHAO,
Yansong QIAO,
Shubing WANG,
Haitao YAO,
Yan WANG,
Chaozhu LI,
Jianli FU,
Zongxiu LIU,
Mingze LI,
Qi MIAO,
Fuchu JIANG
Publication year - 2008
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2008.tb00651.x
Subject(s) - cenozoic , geology , quaternary , glacial period , plateau (mathematics) , aeolian processes , loess , moraine , paleontology , monsoon , period (music) , paleosol , deposition (geology) , geochemistry , geomorphology , oceanography , sediment , structural basin , mathematical analysis , physics , mathematics , acoustics
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.