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https://hdl.handle.net/11499/8784
Title: | Late Holocene terrestrial tephra record at western Anatolia, Turkey: Possible evidence of an explosive eruption outside Santorini in the eastern Mediterranean | Authors: | Kazancö, N. Boyraz, S. Özkul, Mehmet Alçiçek, Mehmet Cihat Kadöoglu, Y.K. |
Keywords: | Acögöl graben Air-fall tephra Çardak Holocene Nisyros Western Anatolia Aegean sea Bulk analysis Coarse silt Coarse-grained Eastern Mediterranean Explosive eruption Geochemical composition Holocenes Late Holocene Tephra deposits Terrestrial sediments Analytical geochemistry Anoxic sediments Mica Silicon compounds Sodium Volcanoes Volcanic rocks biotite chemical composition colluvial deposit dacite explosive volcanism grain size paleosol rhyolite silt tephra tuff volcanic eruption Anatolia Cycladas Denizli [Turkey] Greece Mediterranean Sea Mediterranean Sea (East) Santorin Southern Aegean Turkey |
Abstract: | A 27cm thick, loose tephra deposits has been observed within coarse-grained colluvium at Çardak area of Denizli on the northern apron of the Acögöl graben in western Anatolia, Turkey. It is a biotite-rich tephra with mean grain-size of coarse silt. Chemically it is dacite and rhyolite with average of 66.35% SiO 2 and 4.70% alcalia (Na 2O+K 2O) in bulk analyses. It was deposited a time between 5380±90 and 2395±65yrscal. BP, possibly between 4750 and 3385yrscal. BP according to 14C dating of two palaeosol layers within the colluvium. This is only and the thickest Holocene air-fall tuff layer found in terrestrial sediments in this region so far, and according to present knowledge there is no young volcanic source for such a formation in western Turkey. Analyses and comparisons of the analytic results with those of various young volcanic rocks suggest that the Çardak tephra originated from a volcanic source in the Aegean Sea. Besides, its geochemical composition, formation time and significant thickness represent probably a separate late Holocene explosive eruption in the eastern Mediterranean, apart from the Santorini event. © 2011 Elsevier B.V. | URI: | https://hdl.handle.net/11499/8784 https://doi.org/10.1016/j.gloplacha.2011.09.007 |
ISSN: | 0921-8181 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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