Identification of magnetic minerals in surface sediments of Miyun Lake, Beijing

doi:10.6038/cjg20160818

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Identification of magnetic minerals in surface sediments of Miyun Lake, Beijing
	Han Fei 1,2,3; Wang Fu-Xian 1,2,3; Li Jin-Hua 1,2,5; Qin Hua-Feng 1; Deng Cheng-Long 1,3,4; Pan Yong-Xin 1,2,3,5
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2016-08-01
卷号	59 期号:8 页码:2937-2948
关键词	Sediment Rock magnetism Transmission Electron Microscopy (TEM) Magnetic extraction Biogenic magnetite
DOI	10.6038/cjg20160818
文献子类	Article
英文摘要	Understanding the magnetic properties of natural sediments, which include magnetic concentration, composition and grain size, is fundamental in paleomagnetic and paleoenvironmental studies. Systematic magnetic measurements and non-magnetic methods (e.g., transmission electron microscopy, TEM) provide detailed information of magnetic minerals. In this paper, we established a high efficient magnetic extraction method to separate magnetic minerals from surface sediments of Miyun lake in Beijing. We analyzed the bulk samples, magnetic extracts and residues. Saturation magnetization (M-s), volume magnetic susceptibility (kappa) and saturation isothermal remanent magnetization (SIRM) of the magnetic extracts is about 85%, 75% and 70% of the bulk samples, respectively. Multiple-parameter rock magnetic measurements indicated that the major magnetic minerals in sediments are multi-domain (MD) and single domain (SD) magnetite. TEM analyses revealed detrital MD titano-magnetite, biogenic SD magnetite (magnetofossils) and authigenic superparamagnetic (SP) magnetite. We propose that the combination of rock magnetism and TEM observations is useful to accurately identify the magnetic minerals in sediments.
WOS关键词	ISOTHERMAL REMANENT MAGNETIZATION ; MAGNETOTACTIC BACTERIA ; ACQUISITION CURVES ; ELECTRON-MICROSCOPY ; CRYSTAL-GROWTH ; SEA SEDIMENTS ; WARM PERIOD ; BIOMINERALIZATION ; HOLOCENE ; SUSCEPTIBILITY
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000381166400018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53376]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Paleomagnetism & Geochronol Lab, Beijing 100029, Peoples R China 2.Chinese Acad Sci, France China Biomineralizat & Nanostruct Lab, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Sch Earth Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, CAS Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Han Fei,Wang Fu-Xian,Li Jin-Hua,et al. Identification of magnetic minerals in surface sediments of Miyun Lake, Beijing[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2016,59(8):2937-2948.
APA	Han Fei,Wang Fu-Xian,Li Jin-Hua,Qin Hua-Feng,Deng Cheng-Long,&Pan Yong-Xin.(2016).Identification of magnetic minerals in surface sediments of Miyun Lake, Beijing.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,59(8),2937-2948.
MLA	Han Fei,et al."Identification of magnetic minerals in surface sediments of Miyun Lake, Beijing".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 59.8(2016):2937-2948.