globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2017.11.011
Scopus记录号: 2-s2.0-85034642678
论文题名:
The different climatic response of pedogenic hematite and ferrimagnetic minerals: Evidence from particle-sized modern soils over the Chinese Loess Plateau
作者: Gao X.; Hao Q.; Wang L.; Oldfield F.; Bloemendal J.; Deng C.; Song Y.; Ge J.; Wu H.; Xu B.; Li F.; Han L.; Fu Y.; Guo Z.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 179
起始页码: 69
结束页码: 86
语种: 英语
英文关键词: Chinese Loess Plateau ; Hematite ; Magneto-climofunction ; Mean annual temperature ; Modern soil
Scopus关键词: Climate change ; Ferrimagnetism ; Hematite ; Landforms ; Magnetic domains ; Magnetic properties ; Magnetism ; Minerals ; Sediments ; Soils ; Chinese Loess Plateau ; Climofunction ; Ferrimagnetic minerals ; First-order reversal curves ; Mean annual precipitation ; Mean annual temperatures ; Paleoclimatic reconstruction ; Pseudo single domains ; Silt ; climate variation ; hematite ; loess ; magnetic property ; paleoclimate ; paleosol ; paleotemperature ; pedogenesis ; precipitation (climatology) ; reconstruction ; statistical analysis ; China ; Loess Plateau
英文摘要: In recent years, increasing interest in loess studies has focused on qualitative and quantitative paleoclimatic reconstruction using the imperfect antiferromagnetic mineral hematite. However, the linkage between the hematite formation and climatic variables remains controversial. Here we present the results of a comprehensive investigation of the magnetic properties and statistical analysis of a suite of clay and silt fractions of modern soil samples from 179 sites across the Chinese Loess Plateau (CLP) and adjacent regions. Our objective was to clarify the relationships between modern climatic variables and pedogenic hematite, as well as pedogenic ferrimagnetic minerals. First-order reversal curve measurements were also conducted on representative particle-sized subsamples from a N-S transect to understand the differences in magnetic mineralogy between the two fractions. Our results show that pipette extraction separates the fine-grained superparamagnetic (SP) and most of the single-domain (SD) magnetic grains into the clay fraction, and that the remaining silt fraction displays the magnetic properties of coarse pseudo-single domain (PSD) or a mixture of multidomain (MD)/PSD and a few SD particles. Only the pedogenic clay fraction shows a strong correlation with climatic variables. The application of redundancy analysis helps to distinguish the climate variables controlling the formation of ferrimagnetic minerals and hematite during pedogenesis. On the CLP, pedogenic ferrimagnetic minerals are sensitive to mean annual precipitation, while pedogenic hematite formation is preferentially dependent on mean annual temperature. The confirmation of the temperature-dependent nature of hematite on the CLP provides a new possibility for quantitatively reconstructing the paleotemperature history of Chinese loess/paleosol sequences. © 2017 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112346
Appears in Collections:气候减缓与适应

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作者单位: Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China; Center for Excellence in Tibetan Earth Sciences, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Gao X.,Hao Q.,Wang L.,et al. The different climatic response of pedogenic hematite and ferrimagnetic minerals: Evidence from particle-sized modern soils over the Chinese Loess Plateau[J]. Quaternary Science Reviews,2018-01-01,179
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