globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.05.016
论文题名:
Impact of climate change on the magnetic mineral assemblage in marine sediments from Izu rear arc, NW Pacific Ocean, over the last 1 Myr
作者: Kars M.; Musgrave R.J.; Kodama K.; Jonas A.-S.; Bordiga M.; Ruebsam W.; Mleneck-Vautravers M.J.; Bauersachs T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 480
起始页码: 53
结束页码: 69
语种: 英语
英文关键词: Asian monsoon ; IODP Expedition 350 ; Izu Bonin rear arc ; Magnetite ; Paleoclimate ; Pleistocene
英文摘要: A rock magnetic study was conducted on upper Pleistocene marine sediments from International Ocean Discovery Program Expedition 350 Site U1437 in order to highlight the paleoenvironmental changes in the NW Pacific Ocean influenced by the East Asian monsoon regime. Remanent magnetization analyses, hysteresis properties, first-order reversal curves and low temperature magnetic measurements were carried out, along with electron microscope observations. The results indicate that coarse-grained (titano)-magnetite is the dominant magnetic phase in the magnetic mineral assemblage. Time-series analysis supports that this assemblage is modulated by global climate changes over the last 1 Myr. During the interglacial stages, magnetic minerals are more abundant; and are dominated by coarse-grained (titano)-magnetite of both terrigenous (likely from mainland China) and volcanic (Izu arc front, Japan) origin. During the glacial stages, the magnetic mineral content is lower, probably reflecting partial dissolution of (Ti)-magnetite, and the magnetic assemblage is composed of terrigenous coarse-grained (titano)-magnetite and of higher coercivity, presumably finer eolian particles (likely hematite) as a result of the enhancement of the winter monsoon in continental Asia. The magnetic mineral assemblage reflects a superimposition of volcanic and global climate signals. Bulk organic-geochemical analyses for total and organic carbon as well as nitrogen and sulfur contents confirm a climatic signature in the composition of the sediments with more oxygenated water masses being present during glacial periods. Additional X-ray fluorescence measurements on bulk samples indicate various origins of the sediment particles with both proximal and distal sources. © 2017 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67805
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Center for Advanced Marine Core Research, Kochi University, B200 Monobe, Nankoku, Japan; School of Geosciences, University of Sydney, Sydney, New South Wales, NSW, Australia; Geological Survey of New South Wales, NSW Department of Industry, Maitland, New South Wales, NSW, Australia; Department of Organic Geochemistry, Institute of Geosciences, Christian-Albrechts-University, Ludewig-Meyn-Straße 10, Kiel, Germany; Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala, Sweden; Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, United Kingdom

Recommended Citation:
Kars M.,Musgrave R.J.,Kodama K.,et al. Impact of climate change on the magnetic mineral assemblage in marine sediments from Izu rear arc, NW Pacific Ocean, over the last 1 Myr[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,480
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Kars M.]'s Articles
[Musgrave R.J.]'s Articles
[Kodama K.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Kars M.]'s Articles
[Musgrave R.J.]'s Articles
[Kodama K.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Kars M.]‘s Articles
[Musgrave R.J.]‘s Articles
[Kodama K.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.