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Spatial and glacial‐interglacial variations in provenance of the Chinese Loess Plateau
Author(s) -
Xiao Guoqiao,
Zong Keqing,
Li Gaojun,
Hu Zhaochu,
DupontNivet Guillaume,
Peng Shuzhen,
Zhang Kexin
Publication year - 2012
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2012gl053304
Subject(s) - loess , provenance , geology , paleosol , glacial period , zircon , interglacial , physical geography , plateau (mathematics) , geochemistry , loess plateau , paleontology , soil science , geography , mathematical analysis , mathematics
The Chinese Loess Plateau (CLP) covers an extensive area over 440,000 km 2 and 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.