气候变化领域集成服务门户(CCPortal): Clay mineral assemblages in the Zhaotong Basin of southwestern China: Implications for the late Miocene and Pliocene evolution of the South Asian monsoon

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DOI	10.1016/j.palaeo.2018.11.039
	Clay mineral assemblages in the Zhaotong Basin of southwestern China: Implications for the late Miocene and Pliocene evolution of the South Asian monsoon
	Li P.; Zhang C.; Guo Z.; Deng C.; Ji X.; Jablonski N.G.; Wu H.; Zhu R.
发表日期	2019
ISSN	0031-0182
起始页码	90
结束页码	100
卷号	516
英文摘要	The characteristics of the evolution of the South Asian monsoon during the late Miocene through the Pliocene are highly debated. To obtain a better understanding, we studied the clay mineral assemblages and the clay fraction content of a high-quality sedimentary sequence (borehole core ZK1) spanning the interval of 8.8–2.62 Ma in the Zhaotong Basin, southwestern Yunnan Province, on the southeastern margin of the Tibetan Plateau. Smectite, kaolinite, illite and vermiculite were the four main clay minerals identified, and changes in their relative abundance reveal a distinct pattern of climate change during the study interval. Until the very late Miocene kaolinite and smectite, with a small amount of illite, were dominant, suggesting a relatively warm and humid climate; from ~6.2E to ~2.8 Ma smectite was dominant, with a minor amount of kaolinite and illite, indicating a relatively cool and humid climate; and from ~2.8 to 2.62 Ma vermiculite (HIV) and illite were dominant, with a minor amount of kaolinite, indicating a relatively cold and humid climate. The variation in clay mineral assemblages indicate substantial changes in the South Asian monsoon in the Zhaotong Basin that promoted a change from a warm and humid climate in the late Micoene to cool and humid climate in the very late Miocene through Pliocene, followed by a gradual trend towards a cold and humid climate in the very late Pliocene. Comparison with records from elsewhere indicates that the observed variations in the South Asian monsoon were mainly controlled by global cooling rather than by Tibetan Plateau uplift. © 2018 Elsevier B.V.
英文关键词	Clay fraction; Global cooling; Sedimentary; Yunnan Province
语种	英语
scopus关键词	clay mineral; climate conditions; climate variation; cooling; global climate; Miocene; Pliocene; sedimentary sequence; uplift; China; Qinghai-Xizang Plateau; South Asia; Yunnan; Zhaotong
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/151107
作者单位	Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, China; College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong Province 266590, China; CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Paleoanthropology, Yunnan Institute of Cultural Relics and Archaeology, Kunming, 650118, China; Joint Research Center for Human Evolution and Environmental Changes of Yunnan, Zhaotong, 657000, China; Department of Anthropology, The Pennsylvania State University, University Park, PA 16802, United States
推荐引用方式 GB/T 7714	Li P.,Zhang C.,Guo Z.,et al. Clay mineral assemblages in the Zhaotong Basin of southwestern China: Implications for the late Miocene and Pliocene evolution of the South Asian monsoon[J],2019,516.
APA	Li P..,Zhang C..,Guo Z..,Deng C..,Ji X..,...&Zhu R..(2019).Clay mineral assemblages in the Zhaotong Basin of southwestern China: Implications for the late Miocene and Pliocene evolution of the South Asian monsoon.Palaeogeography, Palaeoclimatology, Palaeoecology,516.
MLA	Li P.,et al."Clay mineral assemblages in the Zhaotong Basin of southwestern China: Implications for the late Miocene and Pliocene evolution of the South Asian monsoon".Palaeogeography, Palaeoclimatology, Palaeoecology 516(2019).