气候变化领域集成服务门户(CCPortal): Refining the Late Quaternary tephrochronology for southern South America using the Laguna Potrok Aike sedimentary record

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DOI	10.1016/j.quascirev.2019.06.001
	Refining the Late Quaternary tephrochronology for southern South America using the Laguna Potrok Aike sedimentary record
	Smith R.E.; Smith V.C.; Fontijn K.; Gebhardt A.C.; Wastegård S.; Zolitschka B.; Ohlendorf C.; Stern C.; Mayr C.
发表日期	2019
ISSN	0277-3791
起始页码	137
结束页码	156
卷号	218
英文摘要	This paper presents a detailed record of volcanism extending back to ∼80 kyr BP for southern South America using the sediments of Laguna Potrok Aike (ICDP expedition 5022; Potrok Aike Maar Lake Sediment Archive Drilling Project - PASADO). Our analysis of tephra includes the morphology of glass, the mineral componentry, the abundance of glass-shards, lithics and minerals, and the composition of glass-shards in relation to the stratigraphy. Firstly, a reference database of glass compositions of known eruptions in the region was created to enable robust tephra correlations. This includes data published elsewhere, in addition to new glass-shard analyses of proximal tephra deposits from Hudson (eruption units H1 and H2), Aguilera (A1), Reclus (R1, R2-3), Mt Burney (MB1, MB2, MBx, MB1910) and historical Lautaro/Viedma deposits. The analysis of the ninety-four tephra layers observed in the Laguna Potrok Aike sedimentary sequence reveals that twenty-five tephra deposits in the record are the result of primary fallout and are sourced from at least three different volcanoes in the Austral Andean Volcanic Zone (Mt Burney, Reclus, Lautaro/Viedma) and one in the southernmost Southern Volcanic Zone (Hudson). One new correlation to the widespread H1 eruption from Hudson volcano at 8.7 (8.6–9.0) cal ka BP during the Quaternary is identified. The identification of sixty-five discrete deposits that were predominantly volcanic ashes (glass and minerals) with subtle characteristics of reworking (in addition to three likely reworked tephra, and one unknown layer) indicates that care must be taken in the analysis of both visible and invisible tephra layers to decipher their emplacement mechanisms. © 2019 The Authors
英文关键词	Geochemistry; Lacustrine; PASADO; Patagonia; Quaternary; South America; Stratigraphy; Tephrochronology; Volcanic ash
语种	英语
scopus关键词	Deposits; Geochemistry; Glass; Minerals; Sedimentology; Stratigraphy; Lacustrine; PASADO; Patagonia; Quaternary; South America; Tephrochronology; Volcanic ash; Volcanoes; emplacement; geochemistry; lacustrine environment; Quaternary; reworking; sediment chemistry; sedimentary sequence; stratigraphy; tephrochronology; volcanic ash; volcanic eruption; volcanism; volcano; Argentina; Laguna Potrok Aike; Patagonia; Santa Cruz [Argentina]; Southern Volcanic Zone
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151853
作者单位	Research Laboratory for Archaeology and the History of Art, University of Oxford, 1 South Parks RoadOX1 3TG, United Kingdom; Department of Earth Sciences, University of OxfordOX1 3AN, United Kingdom; Department of Geosciences, Environment and Society, Université Libre de Bruxelles, Belgium; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, Bremerhaven, D-27568, Germany; Department of Physical Geography, Stockholm University, Stockholm, SE-10691, Sweden; University of Bremen, Institute of Geography, Geomorphology and Polar Research (GEOPOLAR), Celsiusstr. 2, Bremen, D-28359, Germany; Department of Geological Sciences, University of Colorado, Boulder, CO 80309-0399, United States; Institute of Geography, Friedrich-Alexander-Universität Erlangen-Nürnberg, Wetterkreuz 15, Erlangen, 91058, Germany; Department of Earth and Environmental Sciences & GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Str. 10, München, 80333, Germany
推荐引用方式 GB/T 7714	Smith R.E.,Smith V.C.,Fontijn K.,et al. Refining the Late Quaternary tephrochronology for southern South America using the Laguna Potrok Aike sedimentary record[J],2019,218.
APA	Smith R.E..,Smith V.C..,Fontijn K..,Gebhardt A.C..,Wastegård S..,...&Mayr C..(2019).Refining the Late Quaternary tephrochronology for southern South America using the Laguna Potrok Aike sedimentary record.Quaternary Science Reviews,218.
MLA	Smith R.E.,et al."Refining the Late Quaternary tephrochronology for southern South America using the Laguna Potrok Aike sedimentary record".Quaternary Science Reviews 218(2019).