Recent progress of Be-10 tracer studies in Chinese loess

Studies of cosmogenic Be-10 in Chinese loess began about twenty-five years ago and since then a number of research groups worldwide have contributed to a firm understanding of the production, transport, deposition and storage of Be-10 in loess. The essential characteristics that make Be-10 a useful...

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Bibliographic Details
Published in:Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Main Authors: Zhou, Weijian, Xie, Xingjun, Beck, Warren, Kong, Xianghui, Xian, Feng, Du, Yajuan, Wu, Zhenkun
Format: Article in Journal/Newspaper
Language:English
Published: 2015
Subjects:
Chinese Loess
Be-10
Paleoclimate
Paleomagnetism
Brunhes-matuyama Polarity Reversal
Science & Technology
Technology
Physical Sciences
GEOMAGNETIC-FIELD INTENSITY
MAGNETIZATION LOCK-IN
COSMOGENIC RADIONUCLIDE PRODUCTION
MATUYAMA-BRUNHES BOUNDARY
DEEP-SEA SEDIMENTS
ICE CORE
SUSCEPTIBILITY
CLIMATE
RECORD
RECONSTRUCTION
Instruments & Instrumentation
Nuclear Science & Technology
Physics
Atomic
Molecular & Chemical
Nuclear
ice core
Online Access:http://ir.ieecas.cn/handle/361006/5063
https://doi.org/10.1016/j.nimb.2015.02.061
Description
Summary:Studies of cosmogenic Be-10 in Chinese loess began about twenty-five years ago and since then a number of research groups worldwide have contributed to a firm understanding of the production, transport, deposition and storage of Be-10 in loess. The essential characteristics that make Be-10 a useful isotopic tracer in loess, include: (1) dominant atmospheric production directly linked to the intensity of the Earth's magnetic field; (2) climate-dependent deposition; and (3) subsequent immobility, so that as Be-10 accumulates in a loess profile its stratigraphic integrity is preserved. This fact, combined with very high deposition rates in loess on the Chinese Loess Plateau, makes Be-10 an especially valuable continental archive of paleoclimate and paleomagnetism, complementing marine and ice-core records. Here we provide in particular the most recent progress of Be-10 tracer studies in Chinese loess, including the determination of the correct age of the Brunhes-Matuyama polarity reversal at 780 +/- 3 ka B.P., in accord with marine and ice records, and quantitative reconstruction of 130-ka paleoprecipitation using Be-10 from Chinese loess profiles. (C) 2015 Elsevier B.V. All rights reserved.

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