| Title | Can the magnetic susceptibility record of Chinese Red Clay sequence be used for palaeomonsoon reconstructions? |
| Authors | Zhao, Guoyong Han, Yan Liu, Xiuming Chang, Liao Lu, Bin Chen, Qu Guo, Xuelian Yan, Junhui Yan, Jun |
| Affiliation | Xinyang Normal Univ, Coll Urban & Environm Sci, Xinyang 464000, Peoples R China. Fujian Normal Univ, Sch Geol Sci, Fuzhou 350007, Peoples R China. Macquarie Univ, Dept Environm & Geog, Sydney, NSW 2109, Australia. Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China. Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China. Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China. Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou 730000, Peoples R China. Xinyang Normal Univ, Coll Urban & Environm Sci, Xinyang 464000, Peoples R China. Liu, XM (reprint author), Fujian Normal Univ, Sch Geol Sci, Fuzhou 350007, Peoples R China. Liu, XM (reprint author), Macquarie Univ, Dept Environm & Geog, Sydney, NSW 2109, Australia. |
| Keywords | Environmental magnetism Rock and mineral magnetism Asia TEMPERATURE-DEPENDENT SUSCEPTIBILITY LOESS PLATEAU PALEOCLIMATIC SIGNIFICANCE TIBETAN PLATEAU ORIGIN MAGNETOSTRATIGRAPHY PEDOGENESIS PALEOSOLS EVOLUTION SEDIMENTS |
| Issue Date | 2016 |
| Publisher | GEOPHYSICAL JOURNAL INTERNATIONAL |
| Citation | GEOPHYSICAL JOURNAL INTERNATIONAL.2016,204,(3),1421-1429. |
| Abstract | Red Clay underlying the loess-palaeosol sequences on the Chinese Loess Plateau is an eolian deposit. There is a controversy over whether magnetic susceptibility (chi) variations in Red Clay sequence can be used as an indicator of summer palaeomonsoon intensity. This study investigates the magnetic mineralogy, magnetic concentration and magnetic grain size distribution of Jiaxian Red Clay with multimagnetic methods. Our results indicate that the magnetic properties of Jiaxian Red Clay are similar to those of the Quaternary loess-palaeosol sequences, and ultrafine ferrimagnetic grains produced during pedogenesis are responsible for an increase in susceptibility, therefore the chi enhancement mechanism of Red Clay is similar to that of the overlying loess-palaeosol sequences. This paper explores chi variations in the Red Clay sequence through spatial and temporal analysis. The susceptibility variation of six sites along a NNE to SSW transect correlate to palaeoclimatic cycles, so chi can be used to trace the summer palaeomonsoon intensity from a spatial perspective. However, a simple loess-derived calibration function cannot be used to quantitative reconstruct the palaeomonsoon intensity variations thought time. An adjusted calibration function for palaeosols from Red Clay sequence needs to be developed, so that chi can be used to quantitative reconstruct palaeomonsoon intensity. Further study is necessary to develop such a transfer function. |
| URI | http://hdl.handle.net/20.500.11897/437986 |
| ISSN | 0956-540X |
| DOI | 10.1093/gji/ggv510 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 地球与空间科学学院 |
