干旱区生态环境知识资源中心(Arid): Identifying pedogenic magnetic minerals in loess from China and Siberia using isothermal remanent magnetization acquisition curves

Arid

DOI	10.1007/s11200-018-0915-7
	Identifying pedogenic magnetic minerals in loess from China and Siberia using isothermal remanent magnetization acquisition curves
	Le, Zhijun 1; Chen, Jiasheng 1,2; Liu, Xiuming 1,2,3
通讯作者	Liu, Xiuming
来源期刊	STUDIA GEOPHYSICA ET GEODAETICA
ISSN	0039-3169
EISSN	1573-1626
出版年	2019
卷号	63 期号:1 页码:147-167
英文摘要	Aeolian loess is carried by wind and undergoes pedogenesis after deposition. Therefore, both detrital components from the source region and soil pedogenic components contribute to the magnetic properties of the loess. The pedogenic component can be identified by analyzing the coercivity spectra of loess with different degrees of pedogenesis. We used isothermal remanent magnetization acquisition curves to analyze the coercivity spectra of loess in China and Siberia and defined the low (<30 mT), medium (60-100 mT) and high (>100 mT) coercivity components, i.e., components 1, 2, and 3, respectively. In the arid region of Xinjiang, Northwest China, the Bole section, with negligible soil development has loess with only component 2 centered at approximate to 80 mT. In semiarid central China, the Xifeng section has both loess and paleosols with three coercivity components centered at approximate to 26 mT, approximate to 82 mT, and approximate to 960 mT. Component 1 has a pedogenic origin, and the remanence contribution increases in a positive linear relationship with the intensity of pedogenesis. In the humid region of Siberia, the Kurtak section has three coercivity components are centered at approximate to 23 mT, approximate to 78 mT, and approximate to 1014 mT. The remanence contribution of component 1 shows a low correlation with the intensity of pedogenesis. Component 3 is characterized by high-coercivity minerals and its remanence contribution is related to the intensity of pedogenesis. The soil development in the semi-arid Xifeng section tends to produce massive fine-grained ferromagnetic minerals, so the remanence contribution of component 1 is positively correlated with the intensity of pedogenesis. The humid pedogenic environment of the Kurtak section is prone to form high-coercivity minerals and destroys fine-grained ferromagnetic minerals, so the remanence contribution of component 3 increases with the degree of pedogenesis.
英文关键词	IRM loess-paleosol magnetic signal remanence coercivity pedogenic component
类型	Article
语种	英语
国家	Peoples R China ; Australia
收录类别	SCI-E
WOS记录号	WOS:000459512900009
WOS关键词	LOESS/PALEOSOL SEQUENCE ; RECORD ; SUSCEPTIBILITY ; PLATEAU ; CLIMATE ; PALEOCLIMATE ; COMPONENTS ; VEGETATION ; KURTAK ; MAGNETOCLIMATOLOGY
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218944
作者单位	1.Fujian Normal Univ, Coll Geog Sci, Key Lab Subtrop Mt Ecol, Fuzhou 350007, Fujian, Peoples R China; 2.Fujian Normal Univ, Inst Geog, Fuzhou 350007, Fujian, Peoples R China; 3.Macquarie Univ, Dept Geog & Environm, N Ryde, NSW 2109, Australia
推荐引用方式 GB/T 7714	Le, Zhijun,Chen, Jiasheng,Liu, Xiuming. Identifying pedogenic magnetic minerals in loess from China and Siberia using isothermal remanent magnetization acquisition curves[J],2019,63(1):147-167.
APA	Le, Zhijun,Chen, Jiasheng,&Liu, Xiuming.(2019).Identifying pedogenic magnetic minerals in loess from China and Siberia using isothermal remanent magnetization acquisition curves.STUDIA GEOPHYSICA ET GEODAETICA,63(1),147-167.
MLA	Le, Zhijun,et al."Identifying pedogenic magnetic minerals in loess from China and Siberia using isothermal remanent magnetization acquisition curves".STUDIA GEOPHYSICA ET GEODAETICA 63.1(2019):147-167.