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An Integrated Study of the Eolian Dust in Pelagic Sediments From the North Pacific Ocean Based on Environmental Magnetism, Transmission Electron Microscopy, and Diffuse Reflectance Spectroscopy
Zhang, Qiang1,2; Liu, Qingsong3,4; Li, Jinhua2,4; Sun, Youbin5
2018-05-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
Volume123Issue:5Pages:3358-3376
SubtypeArticle
AbstractEolian dust is a major terrigenous component in North Pacific Ocean pelagic sediments and is an important recorder of Asian terrestrial environmental evolution and Northern Hemisphere atmospheric circulation. In order to extract and quantify wind-borne mineral signals and develop a reliable eolian dust proxy for pelagic sediments, we investigated sediments from Ocean Drilling Program Hole 885A, North Pacific Ocean, by integrating results from environmental magnetism, transmission electron microscopy, and diffuse reflectance spectroscopy (DRS). Our results indicate that ferrimagnetic and antiferromagnetic minerals coexist in the sediments. The former includes biogenic magnetite, nano-sized single domain (titano) magnetite inclusions embedded in silicate hosts, submicron vortex state magnetite, and ultrafine superparamagnetic maghemite. The latter includes hematite and goethite. Our results indicate that magnetic properties can be used to determine an overall trend of increased eolian dust inputs, with additional significant influence from biogenic and volcanogenic components. In contrast, a newly proposed parameter Rel(Hm+Gt) (combined hematite and goethite concentration) obtained from DRS measurements extracts precisely the eolian signal and precludes other components. Our DRS results indicate that hematite/goethite and siliceous fractions deposited at Hole 885A were jointly delivered to the North Pacific Ocean from Asian dust sources. Therefore, we suggest that Rel(Hm+Gt) is a reliable eolian dust proxy for pelagic sediments in this region.
KeywordEnvironmental Magnetism Marine Sediments Eolian Dust Diffuse Reflectance Spectroscopy
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/2017JB014951
WOS KeywordISOTHERMAL REMANENT MAGNETIZATION ; LOW-TEMPERATURE OXIDATION ; CHINESE LOESS PLATEAU ; REVERSAL CURVE DIAGRAMS ; EASTERN ALEUTIAN ARC ; ACQUISITION CURVES ; MARINE-SEDIMENTS ; SOURCE REGIONS ; IRON-OXIDES ; DEEP-SEA
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000435944700006
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5095
Collection古环境研究室
Corresponding AuthorLiu, Qingsong
Affiliation1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Qiang,Liu, Qingsong,Li, Jinhua,et al. An Integrated Study of the Eolian Dust in Pelagic Sediments From the North Pacific Ocean Based on Environmental Magnetism, Transmission Electron Microscopy, and Diffuse Reflectance Spectroscopy[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2018,123(5):3358-3376.
APA Zhang, Qiang,Liu, Qingsong,Li, Jinhua,&Sun, Youbin.(2018).An Integrated Study of the Eolian Dust in Pelagic Sediments From the North Pacific Ocean Based on Environmental Magnetism, Transmission Electron Microscopy, and Diffuse Reflectance Spectroscopy.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,123(5),3358-3376.
MLA Zhang, Qiang,et al."An Integrated Study of the Eolian Dust in Pelagic Sediments From the North Pacific Ocean Based on Environmental Magnetism, Transmission Electron Microscopy, and Diffuse Reflectance Spectroscopy".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 123.5(2018):3358-3376.
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