Magnetic characterization of distinct soil layers and its implications for environmental changes in the coastal soils from the Yellow River Delta
Li, Yuan1,2; Zhang, Haibo2,3; Tu, Chen2; Luo, Yongming1,2; Luo, Yongming(Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China)
2018-03-01
发表期刊CATENA
ISSN0341-8162
卷号162页码:245-254
产权排序第2完成单位
摘要The soils in the Yellow River Delta (YRD) were formed through the deposition of the Yellow River sediments under complicated hydrodynamic conditions, resulting in large variability in soil properties. In this study, environmental magnetic analyses were conducted on four typical soil profiles and one high resolution soil profile with distinct soil layers to examine the soil formation process and to track the environmental changes. The results showed that the red clay layer (RCL) in the YRD soil profiles had unique magnetic properties, which could be clearly separated from the yellow silt layer (YSL) at frequency dependent susceptibility (chi(fd)%) > 6%, susceptibility of anhysteretic remanent magnetization (chi(ARM)) > 250 x 10(-8) m(3) kg(-1), chi(ARM)/magnetic susceptibility (chi(lf)) > 5, chi(ARM)/saturated isothermal remanent magnetization (SIRM) > 45 x 10(-5) m A(-1) and SIRM/chi(lf) < 12 x 10(3) A m(-1). The magnetic enhancement of the RCL could be attributed to the presence of fine superparamagnetic (SP)/single domain (SD) ferrimagentic grains sourcing from hydrodynamic sorting of old sediments (e.g., paleosol in the Chinese Loess Plateau). It was hard to discriminate the RCL and YSL in the < 2 mu m fraction by magnetic bi-plots, suggesting that the abundance of clays with higher contents of secondary ferrimagnetic minerals contributed significantly to the magnetic variability of different soil layers in the YRD. Three units were identified in a high resolution soil profile based on the changes of magnetic curves, including a steady deposition process in the upper unit, a strong hydrodynamic process with varied provenance in the middle unit and a heterogeneous deposition process in the lower unit with the RCL. The three units were closely linked to the variation of nutrients (carbon and nitrogen) and metals (chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), zinc (Zn), titanium (Ti) and zirconium (Zr)) in the soil profile, indicating the influence of provenance and sorting during sediment transportation and deposition. The magnetic method is sensitive to characterize soil formation and environmental changes in the coastal zone.
关键词Environmental Magnetism Soil Properties Soil Layers Yellow River Delta Coastal Zone
DOI10.1016/j.catena.2017.11.006
项目资助者China Postdoctoral Science Foundation(2017M611943, 2017M611942) ; National Natural Science Foundation of China (NSFC)(41230858, 41171248) ; Key Research Program of the Chinese Academy of Sciences(KZZD-EW-14) ; Zhejiang A&F University Research Funding(2017FR021) ; Science and Technology Program of Jiangsu, China(BK20141049)
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收录类别SCI
关键词[WOS]CHINESE LOESS PLATEAU ; TEMPERATURE-DEPENDENT SUSCEPTIBILITY ; SEDIMENTARY RECORDS ; CHANNEL SHIFTS ; AEOLIAN DUST ; BOHAI SEA ; HUANGHE ; HOLOCENE ; YANGTZE ; PEDOGENESIS
文章类型Article
语种英语
WOS研究方向Geology ; Agriculture ; Water Resources
WOS记录号WOS:000423004800023
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/23563
专题中科院海岸带环境过程与生态修复重点实验室
通讯作者Luo, Yongming; Luo, Yongming(Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China)
作者单位1.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
3.Zhejiang A&F Univ, Key Lab Soil Pollut Bioremediat Zhejiang Prov, Hangzhou 311300, Zhejiang, Peoples R China
第一作者单位中国科学院烟台海岸带研究所
通讯作者单位中国科学院烟台海岸带研究所
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Li, Yuan,Zhang, Haibo,Tu, Chen,et al. Magnetic characterization of distinct soil layers and its implications for environmental changes in the coastal soils from the Yellow River Delta[J]. CATENA,2018,162:245-254.
APA Li, Yuan,Zhang, Haibo,Tu, Chen,Luo, Yongming,&Luo, Yongming.(2018).Magnetic characterization of distinct soil layers and its implications for environmental changes in the coastal soils from the Yellow River Delta.CATENA,162,245-254.
MLA Li, Yuan,et al."Magnetic characterization of distinct soil layers and its implications for environmental changes in the coastal soils from the Yellow River Delta".CATENA 162(2018):245-254.
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