Magnetostratigraphy and Palaeoclimatic Significance of the Late Pliocene Red Clay-Quaternary Loess Sequence in the Lanzhou Basin, Western Chinese Loess Plateau

被引：12

作者：

Guo, Benhong ^{[1
]}

Peng, Tingjiang ^{[1
]}

Yu, Hao ^{[1
]}

Hui, Zhengchuang ^{[1
,2
]}

Ma, Zhenhua ^{[1
]}

Li, Xiaomiao ^{[1
]}

Feng, Zhantao ^{[1
]}

Liu, Jia ^{[1
]}

Liu, Shanpin ^{[1
]}

Zhang, Jun ^{[1
]}

Ye, Xiyan ^{[1
]}

Song, Chunhui ^{[3
,4
]}

Li, Jijun ^{[1
,5
,6
]}

机构：

[1] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou, Gansu, Peoples R China

[2] Henan Univ, Coll Environm & Planning, Natl Demonstrat Ctr Environm & Planning, Kaifeng, Peoples R China

[3] Lanzhou Univ, Sch Earth Sci, Lanzhou, Peoples R China

[4] Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou, Peoples R China

[5] Nanjing Normal Univ, Coll Geog Sci, Minist Educ, Nanjing, Peoples R China

[6] Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing, Peoples R China

来源：

GEOPHYSICAL RESEARCH LETTERS | 2020年 / 47卷 / 03期

基金：

中国国家自然科学基金;

关键词：

EAST-ASIAN MONSOON; TIBETAN PLATEAU; GRAIN-SIZE; MAGNETIC-SUSCEPTIBILITY; UPLIFT; EVOLUTION; CLIMATE; RECORDS; DEPOSITS; DESERT;

D O I：

10.1029/2019GL086556

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The history of red clay-loess accumulation in the Chinese Loess Plateau (CLP) is the key to understanding the aridification history of the Asian interior and the uplift of the Tibetan Plateau. Here we present high-resolution magnetostratigraphy and grain-size records of a 265.7-m-long drill core of the red clay-loess sequence at Gaolanshan in the Lanzhou Basin from the western CLP. Our results, combined with the loess-paleosol stratigraphy and regional stratigraphic correlation, indicate that the most complete and continuous red clay-loess sequence since similar to 3 Ma was first found in the western CLP, which is similar to 0.8 Myr older than the previously investigated Quaternary loess in the Lanzhou region, and the age of the oldest Lanzhou loess-paleosol sequence is similar to 2.8 Ma. Consequently, the major enhancement of the aridification at 2.8 Ma in the Asian interior was primarily controlled by the uplift of the Tibetan Plateau and global cooling.

引用

页数：10

共 45 条

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