Arid
DOI10.1016/j.palaeo.2013.06.006
A Rb/Sr record of the weathering response to environmental changes in westerly winds across the Tarim Basin in the late Miocene to the early Pleistocene
Chang, Hong; An, Zhisheng; Wu, Feng; Jin, Zhangdong; Liu, Weiguo; Song, Yougui
通讯作者Chang, Hong
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2013
卷号386页码:364-373
英文摘要

The long-term record of lacustrine deposits in the Tarim Basin seems to provide a record of climate influenced by westerly winds. To characterize the evolution of westerly winds, we analyzed concentrations of Rb, V, Zn, Sc and Sr for the drill core Ls2 from Lop Nor in the eastern Tarim Basin. The Rb/Sr ratio in lacustrine deposits depends primarily on the Sr element activity during weathering, after the influence of source provenance has been removed. We assume that with such a correction, the Rb/Sr ratio is controlled by precipitation, which depends on moisture transport by westerly winds to the Tarim Basin. The Rb/Sr ratio displays a large-amplitude oscillation that generally follows a pattern similar to that of pollen and ostracod assemblages, which support the inference that rainfall amount affects the Rb/Sr ratio, and in turn suggests that it may serve as an index of precipitation that was transported by westerly wind. All these climatic proxies obviously changed since the late Miocene, suggesting stronger aridification that may be attributed to a latitudinal shift in westerly winds since the late Miocene. A southward migration of westerly winds, which then transported more moisture to the southern and eastern parts of the Tibetan Plateau, agrees with modeling results and the geological record during that time. This event may be causally related to the expansion of the northern hemisphere ice and/or regional tectonic uplift of high mountains around the Tarim Basin. (C) 2013 Elsevier B.V. All rights reserved.


英文关键词Rb/Sr ratio Weathering Environmental change The Tarim Basin Westerly wind The late Miocene to the early Pleistocene Expansion of the north hemisphere ice volume Tectonic uplift
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000324848800028
WOS关键词LATE CENOZOIC UPLIFT ; LAST 130,000 YEARS ; TIBETAN PLATEAU ; NORTH-ATLANTIC ; CLIMATE-CHANGE ; ASIAN MONSOON ; CHINESE LOESS ; STRONTIUM ISOTOPES ; TAKLIMAKAN DESERT ; EOLIAN DEPOSITION
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179145
作者单位Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
推荐引用方式
GB/T 7714
Chang, Hong,An, Zhisheng,Wu, Feng,et al. A Rb/Sr record of the weathering response to environmental changes in westerly winds across the Tarim Basin in the late Miocene to the early Pleistocene[J],2013,386:364-373.
APA Chang, Hong,An, Zhisheng,Wu, Feng,Jin, Zhangdong,Liu, Weiguo,&Song, Yougui.(2013).A Rb/Sr record of the weathering response to environmental changes in westerly winds across the Tarim Basin in the late Miocene to the early Pleistocene.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,386,364-373.
MLA Chang, Hong,et al."A Rb/Sr record of the weathering response to environmental changes in westerly winds across the Tarim Basin in the late Miocene to the early Pleistocene".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 386(2013):364-373.
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