Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau

ISL OpenIR > 青海盐湖研究所知识仓储

	Middle Miocene to earliest Pliocene sedimentological and geochemical records of climate change in the western Qaidam Basin on the NE Tibetan Plateau
	Song, Chunhui 1,2; Hu, Sihu 1,2; Han, Wenxia3,4 ; Zhang, Tao 1,2; Fang, Xiaomin 5,6; Gao, Junping 1,2; Wu, Fuli 5,6
	2014-02-01
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
卷号	395 页码:67-76
关键词	Qaidam Basin Miocene Soluble Anions Climate Change Global Cooling Tibetan Plateau Uplift
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.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5714
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖地质与环境实验室
作者单位	1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China 2.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 5.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Beijing 100085, Peoples R China 6.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100085, Peoples R China
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]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2014,395:67-76.
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,395,67-76.
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):67-76.