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学科主题: 地质学
题名: Apparent timing and duration of the Matuyama-Brunhes geomagnetic reversal in Chinese loess
作者: Hui Zhao ;  X.K. Qiang ;  Y.B. Sun
关键词: Chinese loess ;  Apparent timing
刊名: Geochemistry, Geophysics, Geosystems
发表日期: 2014-11
卷: 15, 期:11, 页:4468–4480
收录类别: SCI
英文摘要: 

       The Matuyama-Brunhes (MB) geomagnetic reversal in Chinese loess has been studied extensively as an important boundary for land-ocean stratigraphic and paleoclimatic correlations. However, the apparent timing and duration of the MB boundary remain controversial in Chinese loess deposits due to its inconsistent stratigraphic position and the uncertain chronologies. Here we synthesized high-resolution paleomagnetic records from four loess sequences in the central Chinese Loess Plateau and synchronized the loess-paleosol chronology by matching the grain-size variations to orbitally tuned grain-size time series. The synthesized paleomagnetic results reveal consistent features of the MB transition in Chinese loess, including the stratigraphic position (L8/S8 transition), timing (∼808–826 ka), duration (∼14–16 ka), and rapid directional oscillations. Compared with the MB transition in marine records (770–775 ka), the timing of the MB transition is relatively older and longer in Chinese loess, due to a complex interplay between different remanence acquisition mechanisms which occurred during the course of postdepositional physical and chemical processes.

语种: 英语
WOS记录号: WOS:000348060800019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.ieecas.cn/handle/361006/2618
Appears in Collections:古环境研究室_期刊论文

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Recommended Citation:
Hui Zhao,X.K. Qiang,Y.B. Sun. Apparent timing and duration of the Matuyama-Brunhes geomagnetic reversal in Chinese loess[J]. Geochemistry, Geophysics, Geosystems,2014,15(11):4468–4480.
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