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

doi:10.1029/2019GC008401

IVPP-IR > 中科院古脊椎所（2000年以后）

	New High-Temperature Dependence of Magnetic Susceptibility-Based Climofunction for Quantifying Paleoprecipitation From Chinese Loess
	Gao, Xinbo 1; Hao, Qingzhen 1,2,3; Oldfield, Frank 4; Bloemendal, Jan 4; Deng, Chenglong 3,5; Wang, Luo 1,3; Song, Yang 6; Ge, Junyi 2,3,7; Wu, Haibin 1,2,3; Xu, Bing 1,3; Li, Fengjiang 1,2,3; Han, Long 1,3; Fu, Yu 1,3; Guo, Zhengtang 1,2,3
	2019-08-01
发表期刊	GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
卷号	20 期号:8 页码:4273-4291
通讯作者	Hao, Qingzhen([email protected])
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.
关键词	modern soil magneto-climofunction maghemite mean annual precipitation Chinese Loess Plateau
DOI	10.1029/2019GC008401
关键词[WOS]	CURVE FORC DIAGRAMS ; NW-SE TRANSECT ; GRAIN-SIZE ; MODERN SOILS ; PALEOCLIMATIC SIGNIFICANCE ; PLATEAU ; PEDOGENESIS ; TRANSITION ; MINERALS ; SEQUENCE
收录类别	SCI
语种	英语
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]
项目资助者	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
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000490955300025
出版者	AMER GEOPHYSICAL UNION
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/16679
专题	中科院古脊椎所（2000年以后）
通讯作者	Hao, Qingzhen
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Univ Liverpool, Sch Environm Sci, Liverpool, Merseyside, England 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 6.Beijing Res Ctr Urban Syst Engn, Beijing, Peoples R China 7.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China
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.