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New High-Temperature Dependence of Magnetic Susceptibility-Based Climofunction for Quantifying Paleoprecipitation From Chinese Loess

文献类型：期刊论文

作者Gao, Xinbo4; Hao, Qingzhen4,5,6; Oldfield, Frank7; Bloemendal, Jan7; Deng, Chenglong1,6; Wang, Luo4,6; Song, Yang2; Ge, Junyi3,5,6; Wu, Haibin4,5,6; Xu, Bing4,6
刊名GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
出版日期2019-08-01
卷号20期号:8页码:4273-4291
关键词modern soil magneto-climofunction maghemite mean annual precipitation Chinese Loess Plateau
DOI10.1029/2019GC008401
通讯作者Hao, Qingzhen(haoqz@mail.iggcas.ac.cn)
英文摘要The ferrimagnetic properties of soils are used to quantitatively reconstruct paleomonsoon precipitation from Chinese loess. Numerous magneto-climofunctions have been established based on the magnetic proxies that are selectively sensitive to neoformation of fine-grained superparamagnetic (SP) or single-domain (SD) ferrimagnetic particles. Accumulating evidence has indicated that maghemite is the final product of the ferrimagnetic phases during pedogenesis in loessic soils. Quantitative estimates of abundance of maghemite of both SP and SD grains are therefore still required in developing magneto-climofunctions. Here, we present detailed measurements on a suite of modern soil samples from the Chinese Loess Plateau to determine pedogenic ferrimagnetic mineralogy and to develop a new magneto-climofunction based on a new parameter derived from the high-temperature-dependent magnetic susceptibility. Particle size fractionation processes combined with magnetic measurements indicate that fine-grained SP and SD maghemite is the dominant pedogenic ferrimagnetic phases. High-temperature-dependent susceptibility measurements show that the thermally induced susceptibility drops between similar to 230 and similar to 400 degrees C during heating mainly result from the conversion of maghemite to hematite. We proposed a new parameter quantifying changes in the temperature dependence of magnetic susceptibility between 230 and 400 degrees C, chi(td), that captures the concentration of pedogenically formed maghemite. Results show that chi(td) has a strong correlation with known quantities of maghemite in synthetic standard samples and that chi(td) of modern soils correlates with modern mean annual precipitation quite well (R-2 = 0.82, n = 24). The established chi(td)-mean annual precipitation climofunction provides a new approach to reconstructing paleorainfall during past warm interglacials from paleosols in Chinese loess.
WOS关键词CURVE FORC DIAGRAMS ; NW-SE TRANSECT ; GRAIN-SIZE ; MODERN SOILS ; PALEOCLIMATIC SIGNIFICANCE ; PLATEAU ; PEDOGENESIS ; TRANSITION ; MINERALS ; SEQUENCE
资助项目Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41625010] ; National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41430531] ; National Natural Science Foundation of China[41690114] ; National Key Research and Development Program[2017YFE0112800] ; China Postdoctoral Science Foundation[2018 M641464]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000490955300025
资助机构Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Key Research and Development Program ; China Postdoctoral Science Foundation
源URL[http://119.78.100.205/handle/311034/16678]  
专题古脊椎动物与古人类研究所_图书馆1
通讯作者Hao, Qingzhen
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Beijing Res Ctr Urban Syst Engn, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China
5.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China
6.Univ Chinese Acad Sci, Beijing, Peoples R China
7.Univ Liverpool, Sch Environm Sci, Liverpool, Merseyside, England
推荐引用方式
GB/T 7714		 Gao, Xinbo,Hao, Qingzhen,Oldfield, Frank,et al. New High-Temperature Dependence of Magnetic Susceptibility-Based Climofunction for Quantifying Paleoprecipitation From Chinese Loess[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(8):4273-4291.
APA Gao, Xinbo.,Hao, Qingzhen.,Oldfield, Frank.,Bloemendal, Jan.,Deng, Chenglong.,...&Guo, Zhengtang.(2019).New High-Temperature Dependence of Magnetic Susceptibility-Based Climofunction for Quantifying Paleoprecipitation From Chinese Loess.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(8),4273-4291.
MLA Gao, Xinbo,et al."New High-Temperature Dependence of Magnetic Susceptibility-Based Climofunction for Quantifying Paleoprecipitation From Chinese Loess".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.8(2019):4273-4291.

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来源：古脊椎动物与古人类研究所

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