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Late Quaternary Records of the Atmospheric Input of Eolian Dust to the Center of the Chinese Loess Plateau

Published online by Cambridge University Press:  20 January 2017

Xiaoye Zhang ,
Zhisheng An ,
Tuo Chen ,
Guangyu Zhang ,
Richard Arimoto  and
Barbara J. Ray
Xiaoye Zhang
Affiliation:
Xian Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, 3 Xiao Zhai East Road, Xian, 710061, People's Republic of China
Zhisheng An
Affiliation:
Xian Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, 3 Xiao Zhai East Road, Xian, 710061, People's Republic of China
Tuo Chen
Affiliation:
Xian Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, 3 Xiao Zhai East Road, Xian, 710061, People's Republic of China
Guangyu Zhang
Affiliation:
Xian Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, 3 Xiao Zhai East Road, Xian, 710061, People's Republic of China
Richard Arimoto
Affiliation:
Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882-1197
Barbara J. Ray
Affiliation:
Center for Atmospheric Chemistry Studies, Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882-1197
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Abstract

The concentrations of 15 elements and mineral grain-size distributions were determined for Late Quaternary loess sediments from the Chinese Loess Plateau. Particle-size distributions of the loess were approximately log-normal for each of three modes (i.e., 0.04 to 1 μm diameter, 2 to 20 μm, and 20 to 200 μm) that integrate the transport and deposition of eolian dust. The mass particle-size distributions of typical crustal elements (Si, Ca, Fe, Ti, K, Mn, and V) in paleosol and loess samples show patterns similar to those of mineral aerosols, but higher concentrations occur in the submicrometer sediment particles. Absolute principal component analysis of the elemental data suggests that the loess can be described in terms of synsedimentary and postdepositional concentration and subvertical migration of CaCO3 and various elements through the deposit. A variety of geochemical indicators in the loess are apparently sensitive to Asian monsoon variations; these include the mass ratio of course to fine particles, the concentration ratios of certain trace elements, the elemental fluxes associated with eolian dust, and the bulk concentration of Ca in the sediments.

Type
Articles
Information
Quaternary Research , Volume 41 , Issue 1 , January 1994 , pp. 35 - 43
Copyright
University of Washington

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