10 Be and magnetic susceptibility in Chinese loess

10 Be and magnetic susceptibility have been measured in the top 12 m of a loess profile from Luochuan, Central China. Comparison of the 10 Be concentration record with the SPECMAP δ 18 O profile of the last 130 ka (Imbrie et al., 1984] results in a new time scale which is in good agreement with that...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Beer, Jürg, Shen, Chengde, Heller, Friedrich, Liu, Tungsheng, Bonani, George, Dittrich, Beate, Suter, Martin, Kubik, Peter W.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1993
Subjects:
Antarctic
Pacific
Antarc*
Online Access:https://doi.org/10.1029/92GL02676
Description
Summary:10 Be and magnetic susceptibility have been measured in the top 12 m of a loess profile from Luochuan, Central China. Comparison of the 10 Be concentration record with the SPECMAP δ 18 O profile of the last 130 ka (Imbrie et al., 1984] results in a new time scale which is in good agreement with that of Kukla et al. [1990]. The calculated loess accumulation rates can be compared with existing records of dust falls in Pacific deep sea sediments and Antarctic ice cores. A simple model for the 10 Be dust flux demonstrates that a significant part of the magnetic susceptibility signal in palaeosol horizons is due to in situ pedogenic production. During times of high loess accumulation (cold palaeoclimate) this contribution is negligible.

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