Northwestward decline of magnetic susceptibility for the red clay deposit in the Chinese Loess Plateau

Details Northwestward decline of magnetic susceptibility for the red clay deposit in the Chinese Loess Plateau Northwestward decline of magnetic susceptibility for the red clay deposit in the Chinese Loess Plateau

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..15x&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 24, pp. 15-1, CiteID 2162, DOI 10.1029/2002GL015808

Mathematics

Logic

2

Geomagnetism And Paleomagnetism: Environmental Magnetism, Information Related To Geographic Region: Asia, Information Related To Geologic Time: Cenozoic

Scientific paper

The loess-paleosol-red clay sequence in the Chinese Loess Plateau has attracted attention for its potential in recording late Cenozoic climatic changes over northern China, although the details of the climatic implications of the proxies (for example, magnetic susceptibility) and the reconstructed summer monsoon changes remain unclear. Here we report on a new section from Baishui, in Gansu province and compare it with the Lingtai and Jingchuan sections. By correlating the magnetic susceptibility from these sections, we show that there is a clear systematic decrease of the magnetic susceptibility in the red clay deposits from the southeast (Lingtai section) to the northwest (Baishui section). This result suggests that the climatic parameters (probably precipitation) had a decreasing northwestward gradient during the red clay deposition. This climatic pattern is similar to the present condition, implying that the influence of the East Asian summer monsoon on the Chinese Loess Plateau has persisted from at least 6 Ma.

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