Pliocene–Quaternary volcanic rocks of NW Armenia: Magmatism and lithospheric dynamics within an active orogenic plateau

Abstract

'Pliocene-Quaternary volcanic rocks of NW Armenia : magmatism and lithospheric dynamics within an active orogenic plateau. ', Lithos.,[180][181] Further information on publisher's website:http://dx.doi.org/10. 1016/j.lithos.2013.05.005 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Lithos. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Lithos, 180-181, 2013Lithos, 180-181, , 10.1016Lithos, 180-181, /j.lithos.2013 Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

Petrogenesis of mafic collision zone magmatism: The Armenian sector of the Turkish–Iranian Plateau

“…1). Geochemical analysis indicates that many of the recent magmas, with the exception of those in the southern part of Eastern Anatolia close to the Bitlis Suture (e.g., Keskin, 2003), have experienced limited crustal interaction and are not derived from the convecting asthenosphere Neill et al, 2013). Furthermore, as the plateau is not undergoing active extension, magmatism cannot be related to orogenic collapse (Jackson et al, 1995).…”

“…1,2) and is an ideal testing ground for understanding collision zone magmatism, particularly as it contains many accessible Pliocene-Quaternary volcanic centres with mafic, mantle-derived components (e.g., Neill et al, 2013). SW Armenia is underlain by the South Armenian Block, a micro-continental fragment (Şengör, 1984, 1990) consisting of Proterozoic gneisses, schists and amphibolites partially overlain by Devonian to Jurassic sediments, fragments of Jurassic and younger ophiolites and swathes of Paleogene volcanic and intrusive rocks (Şengör et al, 2008;Rolland et al, 2009) (Fig.…”

“…Eruption products range in composition from basalt and alkali basalt (dolerite), tephrite and basanite, to rhyolite (obsidian), with a wide range of total alkali contents (e.g. Karapetian et al, 2001;Meliksetian, 2013;Neill et al, 2013).…”

“…Extensive dolerite flows are a common variety of volcanic activity recognised across the country, filling existing topography and reaching maximum thicknesses of~350 m -the Valley Series of Neill et al (2013). Sheth et al (2015) contend that these mafic flows share similar morphologies to those from much larger continental flood basalt provinces.…”

Testing of multidimensional tectonomagmatic discrimination diagrams on fresh and altered rocks

“…The Pliocene-Pleistocene volcanic rocks of Armenia are considered a key component of the Arabia-Eurasia collision (Neill et al 2013). Thirteen samples of intermediate rocks had complete data for two sets of diagrams; 9 of these samples could be used for the remaining set of diagrams (Table S12).…”