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末次冰盛期后黄河三角洲沉积物的磁性特征及其沉积环境
引用本文:彭俊,李平,陈洪全.末次冰盛期后黄河三角洲沉积物的磁性特征及其沉积环境[J].海洋学报(英文版),2016,35(5):113-123.
作者姓名:彭俊  李平  陈洪全
作者单位:盐城师范学院城市与规划学院, 盐城, 224002,国家海洋局第一海洋研究所, 青岛, 266061,盐城师范学院城市与规划学院, 盐城, 224002
基金项目:The National Natural Science Foundation of China under contract Nos 41306077 and 41501567; the Major Program of University Natural Science Foundation of Jiangsu Province of China under contract No. 14KJA170006; the Natural Science Foundation of Shandong Province of China under contract No. ZR2013DQ025.
摘    要: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(4 μm)and the fine-grained size(32 μm). The sedimentary environment after the last glacial maximum in the Huanghe Delta area has experienced the fluvial facies, the tidal flat facies, the neritic facies, the pro delta facies, the delta front facies and the floodplain facies. Thickness of the Holocene transgression layer is 10.5 m and the depth of substrate is about 24 m according to the YDZ1 core. The sedimentary dynamic has a variation trend with strongweak-strong, which has been proved by the Flemming triangular schema.

关 键 词:黄河三角洲  磁性特征  沉积环境  粒度  测年
收稿时间:2015/4/12 0:00:00
修稿时间:2015/6/16 0:00:00

The magnetic properties of sediment and sedimentary environment in the Huanghe Delta area after the last glacial maximum
PENG Jun,LI Ping and CHEN Hongquan.The magnetic properties of sediment and sedimentary environment in the Huanghe Delta area after the last glacial maximum[J].Acta Oceanologica Sinica,2016,35(5):113-123.
Authors:PENG Jun  LI Ping and CHEN Hongquan
Institution:1.School of Urban and Planning, Yancheng Teacher's University, Yancheng 224002, China2.First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
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 (<4 μm) and the fine-grained size (<32 μm). The sedimentary environment after the last glacial maximum in the Huanghe Delta area has experienced the fluvial facies, the tidal flat facies, the neritic facies, the pro delta facies, the delta front facies and the floodplain facies. Thickness of the Holocene transgression layer is 10.5 m and the depth of substrate is about 24 m according to the YDZ1 core. The sedimentary dynamic has a variation trend with strongweak- strong, which has been proved by the Flemming triangular schema.
Keywords:the Huanghe (Yellow River) Delta  magnetic properties  sedimentary environment  grain size  dating
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