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DOI	10.1017/qua.2021.15
	Chronological and rock magnetic constraints on the transition of the Quaternary paleoclimate in the western Qaidam Basin, NE Tibetan Plateau
	Zhang, Weilin; Li, Tao; Fang, Xiaomin; Zhang, Tao; Yan, Maodu; Zan, Jinbo; Yang, Yibo; Khatri, Dhan Bahadur
通讯作者	Zhang, WL (通讯作者)
发表日期	2021
ISSN	0033-5894
EISSN	1096-0287
起始页码	170
结束页码	181
卷号	104
英文摘要	A closed Quaternary saline paleolake, currently still a lake and named Dalangtan after one of its largest sub-basins, has widely distributed sediments in the western Qaidam Basin, NE Tibetan Plateau. Lacustrine salt minerals and fine sediments from this paleolake provide an environmental record for investigating paleoclimatic evolution in the Asian interior. However, detailed continuous Pliocene-Quaternary paleoclimatic records are broadly lacking from the NE Tibetan Plateau owing to poor exposure of the outcrops in section. For this study, we performed a detailed magnetostratigraphic dating and rock magnetic analysis on a 590-m-long core from the SG-5 borehole in the western Qaidam Basin. The results demonstrate that the lacustrine sediments in the SG-5 borehole were deposited more than similar to 3.0 Ma. Saline minerals began to increase at 1.2 Ma, and the magnetic susceptibility (chi) also changed at that time; the percentage frequency-dependent magnetic susceptibility was relatively low and uniform throughout the whole core. These observations, combined with the chi, pollen, salt ion, and grain-size records from other boreholes, indicate that the western Qaidam Basin and the greater Asian interior had a significant climate transition at 1.2 Ma during an extreme drought.
关键词	MIDPLEISTOCENE CLIMATE TRANSITION ALTYN-TAGH FAULT NORTHERN-HEMISPHERE DEFORMATION HISTORY SECTION RESTORATION EURASIAN CLIMATE SOUTHERN ASIA ICE VOLUME CORE SG-1 EVOLUTION
英文关键词	Magnetostratigraphy; Rock magnetism; Paleoclimate; Quaternary paleolake; Western Qaidam Basin
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000720829800014
来源期刊	QUATERNARY RESEARCH
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/260208
推荐引用方式 GB/T 7714	Zhang, Weilin,Li, Tao,Fang, Xiaomin,et al. Chronological and rock magnetic constraints on the transition of the Quaternary paleoclimate in the western Qaidam Basin, NE Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,104.
APA	Zhang, Weilin.,Li, Tao.,Fang, Xiaomin.,Zhang, Tao.,Yan, Maodu.,...&Khatri, Dhan Bahadur.(2021).Chronological and rock magnetic constraints on the transition of the Quaternary paleoclimate in the western Qaidam Basin, NE Tibetan Plateau.QUATERNARY RESEARCH,104.
MLA	Zhang, Weilin,et al."Chronological and rock magnetic constraints on the transition of the Quaternary paleoclimate in the western Qaidam Basin, NE Tibetan Plateau".QUATERNARY RESEARCH 104(2021).