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Qaidam Basin and northern Tibetan Plateau as dust sources for the Chinese Loess Plateau and paleoclimatic implications
Pullen, A (Pullen, Alex)[1]; Kapp, P (Kapp, Paul)[2]; McCallister, AT (McCallister, Andrew T.)[2]; Chang, H (Chang, Hong)[3]; Gehrels, GE (Gehrels, George E.)[2]; Garzione, CN (Garzione, Carmala N.)[1]; Heermance, RV (Heermance, Richard V.)[4]; Ding, L (Ding, Lin)[5]
2011-11-30
发表期刊GEOLOGY
卷号39期号:11页码:1031-1034
文章类型期刊论文
摘要

The Chinese Loess Plateau of central Asia is composed of interbedded loess and paleosol layers, deposited during glacial and interglacial cycles, respectively, during the past similar to 2.5 m.y. Understanding the provenance of loess is fundamental to reconstructing wind patterns during Quaternary glacial periods. We determined and compared U-Pb ages on zircon crystals from Loess Plateau strata and potential source areas. The results indicate that the loess was largely derived from the Qaidam Basin and the northern Tibetan Plateau to the west, both of which exhibit spatially extensive geomorphic landforms indicative of past (interpreted as pre-Holocene) wind erosion and/or deflation by westerly winds. This challenges the current paradigm that the loess of the Chinese Loess Plateau was largely sourced from deserts located to the northwest, as observed in the modern interglacial climate. We propose that during glacial periods, the mean annual positions of the polar jet streams were shifted equatorward, resulting in more southerly tracks for dust-generating storms and suppression of the East Asian monsoon by inhibiting the subtropical jet from shifting northward across the Tibetan Plateau.

DOI10.1130/G32296.1
收录类别SCI
语种英语
引用统计
被引频次:103[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/10334
专题古环境研究室
通讯作者Pullen, A (Pullen, Alex)[1]; Chang, H (Chang, Hong)[3]
作者单位1.Department of Earth and Environmental Sciences, University of Rochester, Rochester, New York 14627, USA;
2.Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA;
3.Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
4.Department of Geological Sciences, California State University Northridge, Northridge, California 91330-8266, USA;
5.Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100029, China
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Pullen, A ,Kapp, P ,McCallister, AT ,et al. Qaidam Basin and northern Tibetan Plateau as dust sources for the Chinese Loess Plateau and paleoclimatic implications[J]. GEOLOGY,2011,39(11):1031-1034.
APA Pullen, A .,Kapp, P .,McCallister, AT .,Chang, H .,Gehrels, GE .,...&Ding, L .(2011).Qaidam Basin and northern Tibetan Plateau as dust sources for the Chinese Loess Plateau and paleoclimatic implications.GEOLOGY,39(11),1031-1034.
MLA Pullen, A ,et al."Qaidam Basin and northern Tibetan Plateau as dust sources for the Chinese Loess Plateau and paleoclimatic implications".GEOLOGY 39.11(2011):1031-1034.
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