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DOI	10.1016/j.earscirev.2020.103410
	Identifying eolian dust in the geological record
	Meijer N.; Dupont-Nivet G.; Licht A.; Trabucho-Alexandre J.; Bourquin S.; Abels H.A.
发表日期	2020
ISSN	0012-8533
卷号	211
英文摘要	Recognition of terrestrial dust in geological records is essential for reconstructing paleoenvironments and quantifying dust fluxes in the past. However, in contrast to eolian sands, silt-sized dust is difficult to recognize in pre-Quaternary records due to a lack of macroscopic features indicating eolian transport and mixing with alluvial sediments. Windblown dust deposits are commonly identified by comparing their sedimentological and petrological features with Quaternary examples of dust known as loess. Here, we review the characteristics of terrestrial dust deposits and conclude that most of these features are not exclusively windblown and may be formed by alluvial deposits as well. We therefore synthesize a set of criteria which enable a reliable identification and quantification of dust while acknowledging potential contributions of alluvial components. These methods include quartz-grain surface morphology analysis to distinguish eolian and alluvial transport modes, provenance studies to identify local and extrabasinal sources, grain-size-shape end-member modelling to quantify the various sedimentary contributions to the record, and a basin-scale stratigraphic approach to derive regional patterns and avoid interpretation of local phenomena. We reassess the Eocene to Pliocene records of the Chinese Loess Plateau and conclude that these strata represent both alluvial and eolian sediments deposited in extensive mudflat systems. Quaternary loess, by contrast, is almost exclusively composed of windblown dust. The early Pleistocene shift from mudflat to loess deposits is associated with a significant increase in accumulation rates, likely due to increased dust production upwind, overwhelming and blanketing the local mudflat systems in central China. © 2020 Elsevier B.V.
英文关键词	Loess; Loessite; Mineral dust
语种	英语
scopus关键词	alluvial deposit; eolian deposit; geological record; loess; mineral dust; sediment transport; sedimentology; China; Loess Plateau
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209462
作者单位	Institute for Geosciences, Universität Potsdam, Potsdam, 14476, Germany; Univ Rennes, CNRS, Géosciences Rennes - UMR CNRS 6118, Rennes, F-35000, France; Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing, 100871, China; Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States; Department of Earth Sciences, Universiteit Utrecht, P.O. Box 80115, Utrecht, 3508 TC, Netherlands; Department of Geosciences and Engineering, Delft University of Technology, Delft, 2628 CN, Netherlands
推荐引用方式 GB/T 7714	Meijer N.,Dupont-Nivet G.,Licht A.,et al. Identifying eolian dust in the geological record[J],2020,211.
APA	Meijer N.,Dupont-Nivet G.,Licht A.,Trabucho-Alexandre J.,Bourquin S.,&Abels H.A..(2020).Identifying eolian dust in the geological record.EARTH-SCIENCE REVIEWS,211.
MLA	Meijer N.,et al."Identifying eolian dust in the geological record".EARTH-SCIENCE REVIEWS 211(2020).