Contrasting magnetic properties from two loess/paleosol sections in Gansu Province, west China

来源 :Chinese Science Bulletin | 被引量 : 0次 | 上传用户:leoric
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We made comparison of magnetic property between two loess/paleosol sediments from theBeiyuan section, Linxia and the Shajinping section, Lanzhou. The two sections apart only 100 km inNE-SW direction. At the Beiyuan section, enhancement of the low-field magnetic susceptibility, ARMsusceptibility and SIRM are observed in paleosols. The positive correlations among these threeparameters suggest the presence of two magnetic components, i.e. the background component and theenhanced component. The unblocking curves of low-temperature IRM give strong evidence for the ideaof the two components. On the contrary, the magnetic parameters are almost constant throughout theShajinping section. The enhanced component is not found in the Shajinping section. The magneticproperties of the background component are indistinguishable between the two sections. Contrastingmagnetic properties imply the difference of soil formation process between the two sections. We made comparison of magnetic property between two loess / paleosol sediments from the Beiyuan section, Linxia and the Shajinping section, Lanzhou. The two sections apart only 100 km in NE-SW direction. At the Beiyuan section, enhancement of the low-field magnetic susceptibility, The positive correlations among the three parameters suggest the presence of two magnetic components, ie the background component and the enhanced component. The unblocking curves of low-temperature IRM give strong evidence for the idea of ​​the two components. On the contrary to the magnetic parameters are almost constant throughout the Shajinping section. The magnetic components are not found in the Shajinping section. The magnetic components are not found in the Shajinping section. The magnetic components are not found in the Shajinping section.
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