Identifying the origin of the magnetic directional anomalies recorded in the Datong loess profile, northeastern Chinese loess plateau
作者： Rixiang Zhu , Qingsong Liu , Yongxin Pan , Chenglong Deng , Jimin Sun
DOI: 10.1111/J.1365-246X.2006.02848.X
关键词: Excursion 、 Geomorphology 、 Sedimentary rock 、 Geology 、 Anomaly (natural sciences) 、 Magnetic susceptibility 、 Loess plateau 、 Natural remanent magnetization 、 Loess 、 Paleontology
摘要: SUMMARY To better understand the origin of short-term features palaeomagnetic signals recorded by Chinese loess, detailed and magnetic fabric studies were conducted on a loess profile at Datong, northeastern margin plateau, which is characterized both high sedimentation rate (∼18 cm ka−1) variations sedimentary environments. It appears that fabrics, specifically inclination maximum susceptibility principal axis (K1-Inc), are robust means to identify deposition Our results (<∼74 ka) record four palaeodirectional anomalies (referred as A–D). Among them, anomaly C with relatively normal fabrics can be correlated Laschamp (∼40 excursion. In contrast, A, B D accompanying K1-Inc anomalies, interpreted caused post-depositional disturbances. The new improve our understanding origins natural remanent magnetization loess.
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