Spatial and glacial-interglacial variations in provenance of the Chinese Loess Plateau

Authors

  • Guoqiao Xiao,

    Corresponding author
    1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
    • Corresponding author: G. Xiao, State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China. (xgqiaocug@gmail.com)

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  • Keqing Zong,

    1. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
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  • Gaojun Li,

    1. Department of Earth Sciences, Nanjing University, Nanjing, China
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  • Zhaochu Hu,

    1. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
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  • Guillaume Dupont-Nivet,

    1. Geociences Rennes UMR 6118-CRNS, Université de Rennes 1, Campus de Beaulieu, Rennes, France
    2. Paleomagnetic Laboratory ‘Fort Hoofddijk,’ Department of Earth Sciences, Utrecht University, Utrecht, Netherlands
    3. Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, Peking University, Beijing, China
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  • Shuzhen Peng,

    1. Key Laboratory of Tourism and Resources Environment in Universities of Shandong, Taishan College, Tai'an, China
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  • Kexin Zhang

    1. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
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Abstract

[1] The Chinese Loess Plateau (CLP) covers an extensive area over 440,000 km2and provides an unprecedented terrestrial record of Neogene climate. However, it is still unclear whether the provenance of these loess deposits is uniform or contains spatial and temporal differences. Here this is addressed by comparing detrital-zircon age spectra of typical loess and paleosol samples from three distant sites located at the western, middle, and southeastern parts of the CLP. Our results reveal that the zircon age spectra not only change between loess and paleosol layers but also vary from the western to the eastern CLP, at least during the last glacial cycle. The discrepancies of the zircon age spectra among different sites suggest that the loess provenance of CLP is heterogeneous and spatially variable, although it has been suggested that the mineralogical, elemental and isotopic compositions of loess deposits on CLP are highly homogenous spatially and in glacial-interglacial cycles.

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