气候变化领域集成服务门户(CCPortal): Geochemistry of aeolian material from the McMurdo Dry Valleys, Antarctica: Insights into Southern Hemisphere dust sources

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DOI	10.1016/j.epsl.2020.116460
	Geochemistry of aeolian material from the McMurdo Dry Valleys, Antarctica: Insights into Southern Hemisphere dust sources
	Diaz M.A.; Welch S.A.; Sheets J.M.; Welch K.A.; Khan A.L.; Adams B.J.; McKnight D.M.; Cary S.C.; Lyons W.B.
发表日期	2020
ISSN	0012821X
卷号	547
英文摘要	In the Southern Hemisphere, the major sources of dust and other aeolian materials are from Patagonia, South Africa, Australia, and New Zealand. Dust from Patagonia and New Zealand has been identified in ice cores throughout Antarctica, suggesting that during arid and windy periods, such as glacial periods, dust can be entrained and transported onto the continent. However, little information exists on modern Antarctic dust sources, transport, and its role in the Southern Hemisphere dust cycle. We present the first geochemical characterization of aeolian materials collected at five heights (between 5 cm and 100 cm) above the surface in four valleys within the McMurdo Dry Valleys, the largest ice-free area in Antarctica. Our mineralogy data indicate that these materials are primarily derived from local rocks of the McMurdo Volcanics, Ferrar Dolerite, Beacon Sandstone and Granite Harbor Intrusives, with varying contributions of each rock type dependent on the valley location. While major oxide, trace element and rare earth element data show that low elevation and coastal locations (with respect to the Ross Sea) are dominated by local sources, high elevation and inland locations have accumulated both local materials and dust from other distant Southern Hemisphere sources. This far-traveled material may not be accumulating today, but represents a paleo source that is resuspended from the soils. By geochemically “fingerprinting” aeolian materials from the MDV, we can better inform future studies on the transport of materials within Antarctica and between Southern Hemisphere land masses. © 2020 Elsevier B.V.
关键词	aeolian material Antarctica major oxides mineralogy rare earth elements trace elements
英文关键词	Exploratory geochemistry; Ice; Landforms; Location; Minerals; Rare earths; Trace elements; Underwater mineralogy; Coastal locations; Geochemical characterization; Glacial period; High elevation; Local materials; Mcmurdo dry valleys; South Africa; Southern Hemisphere; Dust; dust; eolian deposit; geochemistry; ice core; mineralogy; oxide; rare earth element; Southern Hemisphere; trace element; Antarctica; Australia; East Antarctica; McMurdo Dry Valleys; New Zealand; Patagonia; South Africa
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202562
作者单位	School of Earth Sciences, The Ohio State University, Columbus, OH, United States; Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH, United States; Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, United States; Department of Environmental Sciences, Western Washington University, Bellingham, WA, United States; Department of Biology, Evolutionary Ecology Laboratories, Monte L. Bean Museum, Brigham Young University, Provo, UT, United States; Department of Civil and Environmental Engineering, University of Colorado Boulder, Boulder, CO, United States; Biological Sciences, University of Waikato, Hamilton, New Zealand
推荐引用方式 GB/T 7714	Diaz M.A.,Welch S.A.,Sheets J.M.,et al. Geochemistry of aeolian material from the McMurdo Dry Valleys, Antarctica: Insights into Southern Hemisphere dust sources[J],2020,547.
APA	Diaz M.A..,Welch S.A..,Sheets J.M..,Welch K.A..,Khan A.L..,...&Lyons W.B..(2020).Geochemistry of aeolian material from the McMurdo Dry Valleys, Antarctica: Insights into Southern Hemisphere dust sources.Earth and Planetary Science Letters,547.
MLA	Diaz M.A.,et al."Geochemistry of aeolian material from the McMurdo Dry Valleys, Antarctica: Insights into Southern Hemisphere dust sources".Earth and Planetary Science Letters 547(2020).