Premium
10 Be and magnetic susceptibility in Chinese loess
Author(s) -
Beer Jürg,
Shen Chengde,
Heller Friedrich,
Liu Tungsheng,
Bonani George,
Beate Dittrich,
Suter Martin,
Kubik Peter W.
Publication year - 1993
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 - 10.1029/92gl02676
Subject(s) - loess , geology , paleosol , pedogenesis , magnetic susceptibility , ice core , flux (metallurgy) , geochemistry , mineralogy , soil water , geomorphology , oceanography , soil science , chemistry , organic chemistry , crystallography
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.