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Rock magnetism of loess sediments in northwestern margin of Chinese Loess Plateau since the late last glaciation
Sun, YF (Sun,Yufang)[1,2]; Qiang, XK (Qiang,Xiaoke)[1]; Xu, XW (Xu,Xinwen)[1,2]; Li, XB (Li,Xubin)[1,2]; Li, P (Li,Peng)[1,2]; Zhao, H (Zhao,Hui)[1,2]
2011-05-30
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
Volume54Issue:5Pages:1310-1318
Subtype期刊论文
AbstractWe have carried out a detailed rock magnetic investigation on the loess-paleosol sequences in the Jingyuan and Gulang sites, northwestern margin of Chinese Loess Plateau, including low-field magnetic susceptibility (chi) frequency-dependent susceptibility (chi(fd)%) temperature-dependent susceptibility (chi-T), isothermal remanent magnetization (IRM) and hysteresis loop. The results demonstrate that the total amount of magnetic minerals in Jingyuan and Gulang loess-paleosol sequences is relatively low, and the main magnetic mineral in paleosol and loess is magnetite, where there are maghemite and hematite as well. The maghemite content in paleosol is more than that in loess. Superparamagnetic (SP) and stable single domain (SSD) ferrimagnetic grains are generated in the process of pedogenesis. Cross plots of M(rs)/M(s) vs. B(cr)/B(c) indicate that the mean magnetic grain size in loess and paleosol are pseudo-single domain (PSD). But, the mean diameter of magnetite in loess is slightly larger than that in paleosol, and closer to the range of multi-domain (MD). It results from the fact that less fine-grained magnetite are generated in loess than in paleosol, for there are coarser magnetic particles transported from the source area of eolian to loess layer than to paleosol layer. Although the major factor leading to high susceptibility in S0 is the climate, the effect of coarse magnetic particles from dust source can not be ignored.
DOI10.3969/j.issn.0001-5733.2011.05.020
Indexed BySCI
Language英语
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10266
Collection古环境研究室
Recommended Citation
GB/T 7714
Sun, YF ,Qiang, XK ,Xu, XW ,et al. Rock magnetism of loess sediments in northwestern margin of Chinese Loess Plateau since the late last glaciation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(5):1310-1318.
APA Sun, YF ,Qiang, XK ,Xu, XW ,Li, XB ,Li, P ,&Zhao, H .(2011).Rock magnetism of loess sediments in northwestern margin of Chinese Loess Plateau since the late last glaciation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(5),1310-1318.
MLA Sun, YF ,et al."Rock magnetism of loess sediments in northwestern margin of Chinese Loess Plateau since the late last glaciation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.5(2011):1310-1318.
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