Be-10 and magnetic susceptibility in Chinese loess

Details Be-10 and magnetic susceptibility in Chinese loess Be-10 and magnetic susceptibility in Chinese loess

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20...57b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 1, p. 57-60.

Physics

27

Beryllium 10, Concentration (Composition), Lithology, Magnetic Permeability, Sea Ice, Antarctic Regions, China

Scientific paper

Be-10 and magnetic susceptibility have been measured in the top 12 m of a loess profile from Luochuan, Central China. Comparison of the Be-10 concentration record with the SPECMAP delta-O-18 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 Be-10 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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