气候变化领域集成服务门户(CCPortal): Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record

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DOI	10.1016/j.palaeo.2016.09.002
	Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record
	Yang, Yibo; Fang, Xiaomin; Galy, Albert; Jin, Zhangdong; Wu, Fuli; Yang, Rongsheng; Zhang, Weilin; Zan, Jinbo; Liu, Xiaoming; Gao, Shaopeng
通讯作者	Yang, YB (通讯作者)
发表日期	2016
ISSN	0031-0182
EISSN	1872-616X
起始页码	418
结束页码	431
卷号	461
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.
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
英文关键词	Strontium; Chemical weathering; Sedimentary sorting; Paleosol; Tectonic uplift; Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000385599900032
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258783
推荐引用方式 GB/T 7714	Yang, Yibo,Fang, Xiaomin,Galy, Albert,et al. Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record[J]. 中国科学院青藏高原研究所,2016,461.
APA	Yang, Yibo.,Fang, Xiaomin.,Galy, Albert.,Jin, Zhangdong.,Wu, Fuli.,...&Gao, Shaopeng.(2016).Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,461.
MLA	Yang, Yibo,et al."Plateau uplift forcing climate change around 8.6 Ma on the northeastern Tibetan Plateau: Evidence from an integrated sedimentary Sr record".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 461(2016).