气候变化领域集成服务门户(CCPortal): Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau

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DOI	10.1016/j.palaeo.2013.12.022
	Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau
	Song, Chunhui; Hu, Sihu; Han, Wenxia; Zhang, Tao; Fang, Xiaomin; Gao, Junping; Wu, Fuli
通讯作者	Fang, XM (通讯作者)
发表日期	2014
ISSN	0031-0182
EISSN	1872-616X
起始页码	67
结束页码	76
卷号	395
英文摘要	Global cooling, Tibetan Plateau uplift and the retreat of the Para-Tethys Sea have long been thought to be the key controls of the Cenozoic climate change in the Asian inland. However, due to the scarcity of long-term palaeoclimate records, it is not entirely clear which of these factors plays the major role. Here, we present new sedimentological and geochemical proxy records (TOC, carbonate, SO42- and Cl-) from a 1040 m late Cenozoic sedimentary sequence (ca. 17 to 5.0 Ma) from the western part of the Qaidam Basin, the largest inland basin on the NE Tibetan Plateau. Geochemical records reveal an evident two-stage change. From ca. 17 Ma to 11.1 Ma (Phase I), the proxies show an upward decrease of carbonate content and TOC concentration and a persistent increase in the concentration of the soluble anions SO42- and Cl-, even though superimposed high-frequency fluctuations are evident. From ca. 11.1 Ma to 5.0 Ma (Phase II), the average concentrations of SO42- and Cl- are higher than those from Phase I, and a sharp decrease in the carbonate content occurred. The sedimentological and geochemical proxy records demonstrate that the Qaidam Basin has experienced increased aridity since ca. 11.1 Ma. We suggest that the Miocene global cooling exerted a significant influence on the drying of the Qaidam Basin by decreasing evaporation rates and water vapour concentrations in the atmosphere. The Mio-Pliocene episodic and persistent uplift of the NE Tibetan Plateau exerted an important influence superimposed upon this driving force, while during ca. 11.1 to 8 Ma, the rapid uplift of the Altun Shan might have played a key role in climate change of the Qaidam Basin. (c) 2013 Elsevier B.V. All rights reserved.
关键词	RESOLUTION MAGNETO STRATIGRAPHY LATE CENOZOIC DEFORMATION ASIAN WINTER MONSOON TECTONIC UPLIFT CHINESE LOESS SOUTHERN ASIA DELTA-O-18 RECORD QINGHAI PROVINCE NORTHERN MARGIN AMERICAN-WEST
英文关键词	Qaidam Basin; Miocene; Soluble anions; Climate change; Global cooling; Tibetan Plateau uplift
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:000333494600007
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/258277
推荐引用方式 GB/T 7714	Song, Chunhui,Hu, Sihu,Han, Wenxia,et al. Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau[J]. 中国科学院青藏高原研究所,2014,395.
APA	Song, Chunhui.,Hu, Sihu.,Han, Wenxia.,Zhang, Tao.,Fang, Xiaomin.,...&Wu, Fuli.(2014).Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,395.
MLA	Song, Chunhui,et al."Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 395(2014).