Widespread occurrence of silicate-hosted magnetic mineral inclusions in marine sediments and their contribution to paleomagnetic recording

doi:10.1002/2016JB013109

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 > 地球深部结构与过程研究室

	Widespread occurrence of silicate-hosted magnetic mineral inclusions in marine sediments and their contribution to paleomagnetic recording
	Chang, Liao 1,2; Roberts, Andrew P.2; Heslop, David 2; Hayashida, Akira 3; Li, Jinhua 4; Zhao, Xiang 2; Tian, Wei 1; Huang, Qinghua 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2016-12-01
卷号	121 期号:12 页码:8415-8431
ISSN号	2169-9313
DOI	10.1002/2016JB013109
文献子类	Article
英文摘要	Magnetic mineral inclusions occur commonly within other larger mineral phases in igneous rocks and have been demonstrated to preserve important paleomagnetic signals. While the usefulness of magnetic inclusions in igneous rocks has been explored extensively, their presence in sediments has only been speculated upon. The contribution of magnetic inclusions to the magnetization of sediments, therefore, has been elusive. In this study, we use transmission electron microscope (TEM) and magnetic methods to demonstrate the widespread preservation of silicate-hosted magnetic inclusions in marine sedimentary settings. TEM analysis reveals detailed information about the microstructure, chemical composition, grain size, and spatial arrangement of nanoscale magnetic mineral inclusions within larger silicate particles. Our results confirm the expectation that silicate minerals can protect magnetic mineral inclusions from sulfate-reducing diagenesis and increase significantly the preservation potential of iron oxides in inclusions. Magnetic inclusions should, therefore, be considered as a potentially important source of fine-grained magnetic mineral assemblages and represent a missing link in a wide range of sedimentary paleomagnetic and environmental magnetic studies. In addition, we present depositional remanent magnetization (DRM) modeling results to assess the paleomagnetic recording capability of magnetic inclusions. Our simulation demonstrates that deposition of larger silicate particles with magnetic inclusions will be controlled by gravitational and hydrodynamic forces rather than by geomagnetic torques. Thus, even though these large silicates may contain ideal single-domain particles, they cannot contribute meaningfully to paleomagnetic recording. However, smaller (e.g., silt- and clay-sized) silicates with unidirectionally magnetized magnetic inclusions can potentially record a reliable DRM.
WOS关键词	DEPOSITIONAL REMANENT MAGNETIZATION ; SINGLE PLAGIOCLASE CRYSTALS ; REVERSAL CURVE DIAGRAMS ; EXSOLVED MAGNETITE ; ROCK MAGNETISM ; NEW-ZEALAND ; DISSOLUTION ; DIAGENESIS ; PARTICLES ; INTRUSION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000393181500003
资助机构	"1000 Talents Plan" program of China ; National Natural Science Foundation of China(41574060) ; Australian Research Council(DP120103952 ; DP140104544 ; LE0882854) ; "1000 Talents Plan" program of China ; National Natural Science Foundation of China(41574060) ; Australian Research Council(DP120103952 ; DP140104544 ; LE0882854) ; "1000 Talents Plan" program of China ; National Natural Science Foundation of China(41574060) ; Australian Research Council(DP120103952 ; DP140104544 ; LE0882854) ; "1000 Talents Plan" program of China ; National Natural Science Foundation of China(41574060) ; Australian Research Council(DP120103952 ; DP140104544 ; LE0882854)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53123]
专题	地质与地球物理研究所_地球深部结构与过程研究室
通讯作者	Chang, Liao
作者单位	1.Peking Univ, Sch Earth & Space Sci, Lab Orogen Belts & Crustal Evolut, Beijing, Peoples R China 2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 3.Doshisha Univ, Dept Environm Syst Sci, Kyotanabe, Japan 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Paleomagnetism & Geochronol Lab, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chang, Liao,Roberts, Andrew P.,Heslop, David,et al. Widespread occurrence of silicate-hosted magnetic mineral inclusions in marine sediments and their contribution to paleomagnetic recording[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2016,121(12):8415-8431.
APA	Chang, Liao.,Roberts, Andrew P..,Heslop, David.,Hayashida, Akira.,Li, Jinhua.,...&Huang, Qinghua.(2016).Widespread occurrence of silicate-hosted magnetic mineral inclusions in marine sediments and their contribution to paleomagnetic recording.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,121(12),8415-8431.
MLA	Chang, Liao,et al."Widespread occurrence of silicate-hosted magnetic mineral inclusions in marine sediments and their contribution to paleomagnetic recording".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 121.12(2016):8415-8431.