气候变化领域集成服务门户(CCPortal): Macro- and micro-scale study and chronology of Late Weichselian aeolian sediments in Estonia; north-eastern European Sand Belt

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DOI	10.1007/s00531-019-01746-2
	Macro- and micro-scale study and chronology of Late Weichselian aeolian sediments in Estonia; north-eastern European Sand Belt
	Kalińska E.; Hang T.; Jõeleht A.; Olo S.; Nartišs M.; Adamiec G.
发表日期	2019
ISSN	14373254
起始页码	2021
结束页码	2035
卷号	108 期号:6
英文摘要	Patchy aeolian landforms, representing the NE part of the European Sand Belt, occur in NE Estonia, between the Gulf of Finland and Lake Peipsi. The dunes are restricted to the former glacial lakebed, thus lying directly in contact with glaciolacustrine sediments, and have so far prompted different opinions regarding their genesis and age. This study aims to answer these open questions regarding the age and origin of these landforms and to provide information on the associated past sedimentary processes. To achieve this, we combine macro-scale (sedimentary structures and ground-penetrating radar survey) and micro-scale (grain-size, shape and character of quartz grain surfaces and mineral composition) studies with optically stimulated luminescence dating. The glaciolacustrine fines in the study area are wavy stratified, with the occurrence of mica horizons and prevalence of quartz sand grains with aeolian characteristics. Therefore, these sediments argue for near-standing/low-energy water conditions in the glacial lake, where allochthonous material was delivered by wind. A fall in the lake level and the occurrence of dry land on the northern coast of the regressive Late Weichselian Lake Peipsi favoured aeolian activity from ca. 13.5 to 10.5 ka in the region. The aeolian accumulation was brief—as apparent from the results of the micro-scale study—and lacks evidence of sediment recycling. Only easily-removable mica was deflated at the end of the aeolian depositional phase. Aeolian activity terminated ca. 10.5 ka due to a rising groundwater level that is apparent from the onset of paludification in the region. © 2019, The Author(s).
英文关键词	Aeolian sediments; Dune; Estonia; European Sand Belt; Grain size; Mineral composition; Optically stimulated luminescence dating; Quartz grain surfaces
语种	英语
scopus关键词	dune; dune field; eolian deposit; eolian process; geochronology; glaciolacustrine deposit; grain size; luminescence dating; microstructure; mineralogy; quartz; sediment transport; Weichselian; Estonia
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147798
作者单位	Faculty of Earth Sciences, Nicolaus Copernicus University, Lwowska 1, Toruń, 87-100, Poland; Institute of Ecology and Earth Sciences, University of Tartu, Ravila 14A, Tartu, 50411, Estonia; Department of Geology, Estonian Museum of Natural History, Lai 29A, Tallinn, 10133, Estonia; Faculty of Geography and Earth Sciences, University of Latvia, Jelgavas 1, Riga, 1004, Latvia; Division of Radioisotopes, Institute of Physics-Centre for Science and Education, Silesian University of Technology, Konarskiego 22B, Gliwice, 44-100, Poland
推荐引用方式 GB/T 7714	Kalińska E.,Hang T.,Jõeleht A.,et al. Macro- and micro-scale study and chronology of Late Weichselian aeolian sediments in Estonia; north-eastern European Sand Belt[J],2019,108(6).
APA	Kalińska E.,Hang T.,Jõeleht A.,Olo S.,Nartišs M.,&Adamiec G..(2019).Macro- and micro-scale study and chronology of Late Weichselian aeolian sediments in Estonia; north-eastern European Sand Belt.International Journal of Earth Sciences,108(6).
MLA	Kalińska E.,et al."Macro- and micro-scale study and chronology of Late Weichselian aeolian sediments in Estonia; north-eastern European Sand Belt".International Journal of Earth Sciences 108.6(2019).