气候变化领域集成服务门户(CCPortal): Aridification recorded by lithofacies and grain size in a continuous Pliocene-Quaternary lacustrine sediment record in the western Qaidam Basin; NE Tibetan Plateau

CCPortal

DOI	10.1016/j.palaeo.2020.109903
	Aridification recorded by lithofacies and grain size in a continuous Pliocene-Quaternary lacustrine sediment record in the western Qaidam Basin; NE Tibetan Plateau
	Yang L.; Zhang W.; Fang X.; Cai M.; Lu Y.
发表日期	2020
ISSN	0031-0182
卷号	556
英文摘要	The Pliocene-Quaternary aridification of the Asian interior is key to understanding the impacts of global cooling and Tibetan Plateau uplift and the potential linkage to North Pacific Ocean biochemical processes and global changes. However, there is a lack of detailed continuous Pliocene-Quaternary paleoclimatic records from the Asian interior because most climatic records have been obtained from discontinuous coarse sediment outcrops around the rims of inland basins. Here, we provide a continuous, high-resolution 3.1 Myr record of grain size from the well-dated SG-3 borehole in the western Qaidam Basin on the northeastern Tibetan Plateau, NW China. The results reveal a long-term upward coarsening trend in grain-size that can be divided into three phases: (i) 3.1–1.1 Ma, laminated fine sediments (fine to medium silts) containing scattered gypsum crystals and interbedded by thin beds of marl; (ii) 1.1–0.15 Ma, massive medium to coarse silts interbedded by beds of mirabilite; (iii) 0.15–0 Ma, coarse silts containing thin layers of mirabilite, halite, bloedite, and polyhalite. This pattern reflects the upward shallowing and shrinking of the lake from a brackish lake to a salt lake, and then to a playa, suggesting a long-term stepwise drying of the Asian interior since the Late Pliocene, probably forced by global cooling and uplift of the Tibetan Plateau. © 2020 Elsevier B.V.
英文关键词	Asian interior; Grain size; Paleoclimate; Qaidam Basin; Sediment; SG-3 borehole
语种	英语
scopus关键词	aridity; borehole; fine grained sediment; grain size; lacustrine deposit; lithofacies; playa; Pliocene; proxy climate record; Quaternary; sediment analysis; China; Pacific Ocean; Pacific Ocean (North); Qaidam Basin; Qinghai; Qinghai-Xizang Plateau
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150373
作者单位	CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences (CAS), Beijing, 100101, China; Key Laboratory of Continental Collision and Plateau Uplift, nstitute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, 100081, China; Geomorphology and Quaternary Geology Research Group, University of LiegeLiege 4000, Belgium
推荐引用方式 GB/T 7714	Yang L.,Zhang W.,Fang X.,et al. Aridification recorded by lithofacies and grain size in a continuous Pliocene-Quaternary lacustrine sediment record in the western Qaidam Basin; NE Tibetan Plateau[J],2020,556.
APA	Yang L.,Zhang W.,Fang X.,Cai M.,&Lu Y..(2020).Aridification recorded by lithofacies and grain size in a continuous Pliocene-Quaternary lacustrine sediment record in the western Qaidam Basin; NE Tibetan Plateau.Palaeogeography, Palaeoclimatology, Palaeoecology,556.
MLA	Yang L.,et al."Aridification recorded by lithofacies and grain size in a continuous Pliocene-Quaternary lacustrine sediment record in the western Qaidam Basin; NE Tibetan Plateau".Palaeogeography, Palaeoclimatology, Palaeoecology 556(2020).