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DOI: 10.1002/2015GL066153
论文题名:
Two possible source regions for central Greenland last glacial dust
作者: Újvári G.; Stevens T.; Svensson A.; Klötzli U.S.; Manning C.; Németh T.; Kovács J.; Sweeney M.R.; Gocke M.; Wiesenberg G.L.B.; Markovic S.B.; Zech M.
刊名: Geophysical Research Letters
ISSN: 0094-8340
EISSN: 1944-8071
出版年: 2015
卷: 42, 期:23
起始页码: 10399
结束页码: 10408
语种: 英语
英文关键词: clay mineralogy ; Greenland dust ; origin ; provenance ; Sr-Nd-Hf isotopes
Scopus关键词: Clay deposits ; Clay minerals ; Glacial geology ; Hafnium ; Isotopes ; Minerals ; Sediments ; Silt ; Strontium ; Clay mineralogy ; Greenland ; Hf isotope ; Origin ; Provenance ; Dust ; clay mineral ; dust ; hafnium ; ice core ; isotopic composition ; loess ; mineralogy ; neodymium isotope ; Northern Hemisphere ; provenance ; strontium isotope ; Arctic ; Greenland
英文摘要: Dust in Greenland ice cores is used to reconstruct the activity of dust-emitting regions and atmospheric circulation. However, the source of dust material to Greenland over the last glacial period is the subject of considerable uncertainty. Here we use new clay mineral and <10 μm Sr-Nd isotopic data from a range of Northern Hemisphere loess deposits in possible source regions alongside existing isotopic data to show that these methods cannot discriminate between two competing hypothetical origins for Greenland dust: an East Asian and/or central European source. In contrast, Hf isotopes (<10 μm fraction) of loess samples show considerable differences between the potential source regions. We attribute this to a first-order clay mineralogy dependence of Hf isotopic signatures in the finest silt/clay fractions, due to absence of zircons. As zircons would also be absent in Greenland dust, this provides a new way to discriminate between hypotheses for Greenland dust sources. © 2015. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953637989&doi=10.1002%2f2015GL066153&partnerID=40&md5=74a79b6d61ffb5a28043aad4b89bc53d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7956
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budapest, Hungary

Recommended Citation:
Újvári G.,Stevens T.,Svensson A.,et al. Two possible source regions for central Greenland last glacial dust[J]. Geophysical Research Letters,2015-01-01,42(23).
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