干旱区生态环境知识资源中心(Arid): East Asian paleoclimate change in the Weihe Basin (central China) since the middle Eocene revealed by clay mineral analysis

Arid

	East Asian paleoclimate change in the Weihe Basin (central China) since the middle Eocene revealed by clay mineral analysis
	Lyu Hengzhi; Lu Huayu; Wang Yichao; Zhang Hanzhi; Wang Yao; Wang Kexin; Lai Wen; Liu Zhifei; Li Yanli; Ji Junfeng
来源期刊	Science China. Earth Sciences
ISSN	1674-7313
出版年	2021
卷号	64 期号:8 页码:1285-1304
英文摘要	Obtaining a continuous sedimentary record of Cenozoic East Asian paleoclimate change is key to understand the origin, evolution and driving mechanism of the East Asian monsoon and climate change. Based on the continuous Cenozoic fluvial and lacustrine sedimentary sequence in the Weihe Basin, central China, we carried out research on the content and crystal parameters of clay minerals. The paleoclimate change since the middle Eocene was reconstructed accordingly. The results show that smectite and illite are the dominant clay minerals in fluvial-lacustrine sediments of Weihe Basin. The crystallinity of illite, the chemical index of illite, the ratio of smectite to illite and chlorite decrease gradually, which indicates that chemical weathering in the Weihe River watershed stepwise weakened since the middle Eocene, under the background of a semi-arid and semi-humid climate. The formation of palygorskite may be affected by a weak diagenesis. In this case, the content of smectite and the illite crystallinity caused by the weathering in the corresponding period may be actually higher than that of the current, which indicates that the climate in the Weihe Basin region was relatively warm and humid from the middle Eocene to Pliocene. With the decrease of Cenozoic global temperature and the continuous accumulation of sediments, the intensity of chemical weathering in the Weihe Basin gradually weakened, and the East Asian monsoon climate gradually evolved until becoming dry in the Quaternary. Evidence from clay minerals also indicates that the aridification in the Weihe Basin from the late Eocene to the Oligocene may be a response to the global cooling event at the Eocene-Oligocene transition.
英文关键词	Cenozoic epoch Weihe Basin Clay mineral Paleoclimate East Asian moonsoon
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Geology
CSCD记录号	CSCD:7059166
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377476
作者单位	Lyu Hengzhi, Frontiers Science Center for Critical Earth Material Cycling, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China.; Lu Huayu, Frontiers Science Center for Critical Earth Material Cycling, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China.; Wang Yichao, Frontiers Science Center for Critical Earth Material Cycling, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China.; Zhang Hanzhi, Frontiers Science Center for Critical Earth Material Cycling, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China.; Wang Yao, Frontiers Science Center for Critical Earth Material Cycling, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China.; Wang Kexin, Frontiers Science Center for Critical Earth Material Cycling, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China.; Lai Wen, Frontiers Scien...
推荐引用方式 GB/T 7714	Lyu Hengzhi,Lu Huayu,Wang Yichao,et al. East Asian paleoclimate change in the Weihe Basin (central China) since the middle Eocene revealed by clay mineral analysis[J],2021,64(8):1285-1304.
APA	Lyu Hengzhi.,Lu Huayu.,Wang Yichao.,Zhang Hanzhi.,Wang Yao.,...&Ji Junfeng.(2021).East Asian paleoclimate change in the Weihe Basin (central China) since the middle Eocene revealed by clay mineral analysis.Science China. Earth Sciences,64(8),1285-1304.
MLA	Lyu Hengzhi,et al."East Asian paleoclimate change in the Weihe Basin (central China) since the middle Eocene revealed by clay mineral analysis".Science China. Earth Sciences 64.8(2021):1285-1304.