YIC-IR  > 中科院海岸带环境过程与生态修复重点实验室
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
Source PublicationCATENA
ISSN0341-8162
Volume162Pages:245-254
Contribution Rank第2完成单位
AbstractThe 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.
KeywordEnvironmental Magnetism Soil Properties Soil Layers Yellow River Delta Coastal Zone
DOI10.1016/j.catena.2017.11.006
Funding OrganizationChina 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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Indexed BySCI
WOS KeywordCHINESE LOESS PLATEAU ; TEMPERATURE-DEPENDENT SUSCEPTIBILITY ; SEDIMENTARY RECORDS ; CHANNEL SHIFTS ; AEOLIAN DUST ; BOHAI SEA ; HUANGHE ; HOLOCENE ; YANGTZE ; PEDOGENESIS
SubtypeArticle
Language英语
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS IDWOS:000423004800023
Citation statistics
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/23563
Collection中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorLuo, Yongming; Luo, Yongming(Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China)
Affiliation1.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
First Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Corresponding Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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