Open AccessA 1400 year environmental magnetic record from varved sediments of L ake X iaolongwan ( N ortheast C hina) reflecting natural and anthropogenic soil erosion
Author(s) -
Su Youliang,
Chu Guoqiang,
Liu Qingsong,
Jiang Zhaoxia,
Gao Xing,
Haberzettl Torsten
Publication year - 2015
Publication title -
geochemistry, geophysics, geosystems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.928
H-Index - 136
ISSN - 1525-2027
DOI - 10.1002/2015gc005880
Subject(s) - magnetite , sediment , varve , geology , sediment core , environmental magnetism , magnetic susceptibility , geochemistry , natural (archaeology) , superparamagnetism , ecosystem , pedogenesis , earth science , geomorphology , ecology , soil water , paleontology , soil science , chemistry , magnetic field , physics , quantum mechanics , magnetization , biology , crystallography
Lake sediments can provide high‐quality information about human activities. In this study, we investigate a sediment core from Lake Xiaolongwan using magnetic and geochemical methods. The dominant magnetic minerals of this sediment core are stable single domain (SSD) and superparamagnetic (SP) magnetite particles. The increasing amount of SP particles reflected by the rise of magnetic susceptibility and frequency dependent magnetic susceptibility since AD 1500 can be attributed to an increasing influx in pedogenic soil, which is related to a regional‐scale increase in the intensity of human activity in Northeastern China. This extends the timing of human activities, which is independent from climate changes and its effects on local ecosystems in Northeastern China significantly.