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学科主题: 地球科学::地质学
题名: Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record
作者: Yang, YB (Yang, Yibo)1, 2, 3; Fang, XM (Fang, Xiaomin)1, 2; Galy, A (Galy, Albert)3; Jin, ZD (Jin, Zhangdong)4; Wu, FL (Wu, Fuli)1, 2; Yang, RS (Yang, Rongsheng)1; Zhang, WL (Zhang, Weilin)1, 2; Zan, JB (Zan, Jinbo)1; Liu, XM (Liu, Xiaoming)1; Gao, SP (Gao, Shaopeng)1
通讯作者: Yang, YB
关键词: CHINESE LOESS PLATEAU ; RESOLUTION MAGNETO STRATIGRAPHY ; LATE CENOZOIC DEFORMATION ; ASIAN MONSOON CLIMATE ; WESTERN QAIDAM BASIN ; LINXIA BASIN ; SOUTH CHINA ; NORTHERN-HEMISPHERE ; GRANITIC PEGMATITES ; WEATHERING RESPONSE
刊名: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
发表日期: 2016
DOI: 10.1016/j.palaeo.2016.09.002
卷: 461, 期:0, 页:418-431
收录类别: SCI
合作性质: 国际
文章类型: Article
部门归属: 碰撞与隆升
英文摘要: The uplift of the northern Tibetan Plateau (TP) has long been regarded as one of major factors accounting for both the enhanced process of aridification recorded in central Asia and the shifts in the Asian monsoonal circulations that are known to have occurred at approximately 8 Ma. Until now, there have been few sedimentary records reported on which can directly, and in an integrated fashion, shed light on the region's tectonic and climate regimes. This can be largely attributed to the fact that the influence exerted by the presence of source materials and subsequent sedimentary sorting in this tectonically active region would be likely to bias significantly any paleoclimatic interpretation of silicate-derived proxies. Based on detailed investigations of strontium (Sr) distributions revealed by multi-step leaching in a fluvial sequence from the Linxia Basin which includes paleosols, we reconstructed the long-term late Miocene regional climatic and environmental changes likely to have occurred on the northeastern TP from 12.1 to 5.2 Ma. We investigated Sr-related proxies in two typical paleosol profiles to constrain Sr mobility in paleosol weathering, and, thus, to further prompt the interpretation of Sr-related proxies along the whole section. We would suggest that carbonate-derived Sr concentrations and Sr/Ca ratios are suitable proxies for tracing regional climate change associated with weathering and pedogenesis; together, they exhibit weakened chemical weathering intensity and pedogenesis at similar to 8.6 Ma. The concomitant appearance of immature sediments through poor sedimentary sorting revealed by silicate-derived Rb/Sr, Sr-87/Sr-86 and Eu anomaly (Eu/Eu*) alongside a sharp increase in sedimentation rates noted at this time suggests that it was indeed tectonic uplift that principally controlled the dramatic climatic and environmental changes. This multi-proxy record of concomitant tectonic uplift and climate change in the Linxia Basin provides direct geological evidence for uplift driven climate change in the northeastern TP region. (C) 2016 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000385599900032
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7517
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100085, Peoples R China
3.Univ Lorraine, CNRS, UMR7358, Ctr Rech Petrograph & Geochim, 15 Rue Notre Dame Pauvres, F-54500 Vandoeuvre Les Nancy, France
4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China

Recommended Citation:
Yang, YB ,Fang, XM ,Galy, A ,et al. Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2016,461(0):418-431.
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