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The magnetic properties of sediment and sedimentary environment in the Huanghe Delta area after the last glacial maximum PENG Jun1*, LI Ping2, CHEN Hongquan1 1 School of Urban and Planning, Yancheng Teacher’s University, Yancheng 224002, China 2 First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received 12 April 2015; accepted 16 June 2015 ©The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2016

Abstract

On the basis of measuring the magnetic parameters of sediment in Core YDZ1, combined with a grain size analysis and Carbon-14 dating, the magnetic properties of sediment and sedimentary environment in the Huanghe (Yellow River) Delta area after the last glacial maximum have been studied. The results show that the ferrimagnetic minerals of a pseudo single domain and multi domain particles dominate the magnetic properties of sediment in Core YDZ1. The imperfect anti ferrimagnetic minerals have more contribution on sediment in a depth of 24.0–22.1 m, and more stable-single domain and pseudo single domain particles exist. The susceptibility of anhysteretic remanent magnetization and the ratio of the susceptibility of anhysteretic remanent magnetization to saturation isothermal remanent magnetization show a decrease trend below depth of 24 m, a marked increase trend in a depth of 24.0–13.5 m, and a rapid decrease at depth of 13.5 m, then a fluctuation trend upward. The above two magnetic parameters and the ratio of the susceptibility of anhysteretic remanent magnetization to the mass susceptibility can be regarded as the proxy indicators for the content of clay (