Environmental mechanism of magnetic susceptibility changes of lacustrine sediments from Lake Hulun, China

CORC > 南京地理与湖泊研究所 > 中国科学院南京地理与湖泊研究所 > 湖泊室

	Environmental mechanism of magnetic susceptibility changes of lacustrine sediments from Lake Hulun, China
	Hu, SY; Wang, SM; Appel, E; Ji, L
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2000
卷号	43 期号:5 页码:534-540
关键词	lacustrine sediment magnetic susceptibility environmental magnetism ferrimagnetic iron sulphide Lake Hulun
ISSN号	1006-9313
英文摘要	The changes of magnetic susceptibility (kappa) are correlated with those of corresponding sedimentological, geochemical, mineralogical and biological results, which verifies that kappa can be taken as one of the environmental proxies. However, usually the exact origin of magnetic signal is poorly understood, and is difficult to relate with the environmental evolution. Magnetic properties of material derived from the catchment and sedimentary environment may affect the accumulation, preservation, or authigenesis and diagenesis of magnetic minerals. In the Lake Hulun region in inner Mongolia, it is found that muddy sediments, deposited during high water level period (corresponding to humid climate), have comparatively high kappa values. In contrast, the sandy sediments, deposited during low water level period (corresponding to arid climate), have low kappa values. Detailed rock magnetic investigation confirms that detrital magnetite derived from volcanic rocks in the catchment exists in both muddy and sandy sediments. During high water level period, secondary ferrimagnetic iron sulphide was produced in muddy sediments under relatively reductive conditions. Ferrimagnetic iron sulphide, coexisting with detrital magnetite, predominates the magnetic properties of muddy sediments, resulting in increasing kappa: This paper reveals the significance of authigenic ferrimagnetic iron sulphide produced after sediment deposition.
公开日期	2012-03-02
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/2315]
专题	南京地理与湖泊研究所_湖泊室
推荐引用方式 GB/T 7714	Hu, SY,Wang, SM,Appel, E,et al. Environmental mechanism of magnetic susceptibility changes of lacustrine sediments from Lake Hulun, China[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2000,43(5):534-540.
APA	Hu, SY,Wang, SM,Appel, E,&Ji, L.(2000).Environmental mechanism of magnetic susceptibility changes of lacustrine sediments from Lake Hulun, China.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,43(5),534-540.
MLA	Hu, SY,et al."Environmental mechanism of magnetic susceptibility changes of lacustrine sediments from Lake Hulun, China".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 43.5(2000):534-540.