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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
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
卷号123期号:5页码:3358-3376
文章类型Article
摘要Eolian 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.
关键词Environmental Magnetism Marine Sediments Eolian Dust Diffuse Reflectance Spectroscopy
WOS标题词Science & Technology ; Physical Sciences
DOI10.1002/2017JB014951
关键词[WOS]ISOTHERMAL REMANENT MAGNETIZATION ; LOW-TEMPERATURE OXIDATION ; CHINESE LOESS PLATEAU ; REVERSAL CURVE DIAGRAMS ; EASTERN ALEUTIAN ARC ; ACQUISITION CURVES ; MARINE-SEDIMENTS ; SOURCE REGIONS ; IRON-OXIDES ; DEEP-SEA
收录类别SCI
语种英语
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000435944700006
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5095
专题古环境研究室
通讯作者Liu, Qingsong
作者单位1.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
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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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