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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
Source PublicationGEOLOGY
Volume39Issue:11Pages:1031-1034
Subtype期刊论文
Abstract

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
Indexed BySCI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10334
Collection古环境研究室
Corresponding AuthorPullen, A (Pullen, Alex)[1]; Chang, H (Chang, Hong)[3]
Affiliation1.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
Recommended Citation
GB/T 7714
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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