Arid
DOI10.1346/CCMN.2012.0600302
CLAY MINERALOGY OF THE ZHADA SEDIMENTS: EVIDENCE FOR CLIMATIC AND TECTONIC EVOLUTION SINCE similar to 9 Ma IN ZHADA, SOUTHWESTERN TIBET
Hong, Hanlie1,2; Wang, Chaowen2; Zeng, Kefeng2; Zhang, Kexin1,2; Yin, Ke2; Li, Zhaohui3
通讯作者Hong, Hanlie
来源期刊CLAYS AND CLAY MINERALS
ISSN0009-8604
出版年2012
卷号60期号:3页码:240-253
英文摘要

The clay mineralogy of the Zhada sediments was investigated, using X-ray diffraction and scanning electron microscopy, to obtain a better understanding of climatic change and uplift of the Himalayas in the Zhada region of Tibet. The sediments of Zhada basin in the late Miocene to Pliocene consist of lacustrine and fluvial deposits >800 m thick and can be subdivided into five clay assemblage zones based on their clay-mineral composition. The upward zonation is as follows: (1) smectite-kaolinite; (2) illite-chlorite; (3) chlorite-illite-kaolinite; (4) illite-chlorite; and (5) smectite, illite, and kaolinite. The ratio of chlorite + illite to kaolinite + smectite (Ch+I/K+S) and the Kubler index indicate a warm and humid climate from 9.5 to 8.4 Ma, a cold and dry climate from 8.4 to 7.2 Ma, a warm and seasonal arid climate from 7.2 to 4.5 Ma, a cool and humid climate from 4.5 to 3.6 Ma, and a warm and seasonally humid climate from 3.6 to 3.0 Ma. Intense fluctuations in the Kubler index and in the quantities of evaporite minerals dolomite, aragonite, and gypsum, during the period 7.2-4.5 Ma suggest strong climatic fluctuations between humid and seasonally humid conditions in the Zhada basin. Rapid uplift around the Zhada basin occurred at 8.4 and 3.6 Ma, with sharp subsidence at 7.2 and 4.5 Ma. Evolution of the climate at Zhada showed a different model from that of global climate change, and tectonics-led climate change was the major contributor to climate evolution in the area.


英文关键词Kubler Index Paleoclimate Tibetan Plateau Uplift Zhada Basin
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000308834800002
WOS关键词MIOCENE ENVIRONMENTAL-CHANGE ; PALEOCLIMATIC INTERPRETATION ; THAKKHOLA GRABEN ; CENTRAL NEPAL ; LAKE BAIKAL ; PLATEAU ; UPLIFT ; BASIN ; RECORD ; INDIA
WOS类目Chemistry, Physical ; Geosciences, Multidisciplinary ; Mineralogy ; Soil Science
WOS研究方向Chemistry ; Geology ; Mineralogy ; Agriculture
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/171805
作者单位1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Hubei, Peoples R China;
2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Hubei, Peoples R China;
3.Univ Wisconsin Parkside, Dept Geosci, Kenosha, WI 53141 USA
推荐引用方式
GB/T 7714
Hong, Hanlie,Wang, Chaowen,Zeng, Kefeng,et al. CLAY MINERALOGY OF THE ZHADA SEDIMENTS: EVIDENCE FOR CLIMATIC AND TECTONIC EVOLUTION SINCE similar to 9 Ma IN ZHADA, SOUTHWESTERN TIBET[J],2012,60(3):240-253.
APA Hong, Hanlie,Wang, Chaowen,Zeng, Kefeng,Zhang, Kexin,Yin, Ke,&Li, Zhaohui.(2012).CLAY MINERALOGY OF THE ZHADA SEDIMENTS: EVIDENCE FOR CLIMATIC AND TECTONIC EVOLUTION SINCE similar to 9 Ma IN ZHADA, SOUTHWESTERN TIBET.CLAYS AND CLAY MINERALS,60(3),240-253.
MLA Hong, Hanlie,et al."CLAY MINERALOGY OF THE ZHADA SEDIMENTS: EVIDENCE FOR CLIMATIC AND TECTONIC EVOLUTION SINCE similar to 9 Ma IN ZHADA, SOUTHWESTERN TIBET".CLAYS AND CLAY MINERALS 60.3(2012):240-253.
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