BE-10 AND MAGNETIC-SUSCEPTIBILITY IN CHINESE LOESS

被引：75

作者：

BEER, J

SHEN, CD

HELLER, F

LIU, TS

BONANI, G

DITTRICH, B

SUTER, M

KUBIK, PW

机构：

[1] ACAD SINICA, INST GEOCHEM, CANTON, PEOPLES R CHINA

[2] SWISS FED INST TECHNOL, INST GEOPHYS, CH-8093 ZURICH, SWITZERLAND

[3] CHINESE ACAD SCI, BEIJING, PEOPLES R CHINA

[4] SWISS FED INST TECHNOL, INST MITTELENERGIEPHYS, PAUL SCHERRER INST, CH-8093 ZURICH, SWITZERLAND

来源：

GEOPHYSICAL RESEARCH LETTERS | 1993年 / 20卷 / 01期

关键词：

D O I：

10.1029/92GL02676

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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 deltaO-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.

引用

页码：57 / 60

页数：4

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