Ekici, T. and Macpherson, C.G. and Otlu, N. (2012) 'Polybaric melting of a single mantle source during the Neogene Siverek phase of the Karacadağ Volcanic Complex, SE Turkey.', Lithos., 146-147 . pp. 152-163.
Abstract
Siverek plateau basalts represent the Neogene activity of the Karacadağ Volcanic Complex in southeast Turkey and can be divided into two groups based on incompatible element concentrations. Group 1 is largely basaltic, containing some alkali basalts, while Group 2 consists of alkali basalts, trachybasalts and tephrites. The lavas display a range in major element concentrations that are consistent with restricted amounts of differentiation in the crust. Melts from both groups have experienced variable, small amounts of interaction with crustal rocks, which is responsible for most of the isotopic heterogeneity and caused significant Ba-enrichment. Neither fractional crystallisation nor crustal contamination can account for the differences in trace element enrichment observed between the two groups. Group 1 is derived mainly from the spinel lherzolite field by > 1% partial melting. Group 2 lavas were derived from very similar mantle but by smaller degrees of melting and contain a larger relative contribution from garnet-lherzolite. The Siverek plateau lavas are indistinguishable from contemporaneous magmatism in the Karasu Valley of southern Turkey and in northernmost Syria. Together, these plateau basalt fields represent mantle upwelling and melting beneath the thinned and/or weakened Arabian Plate as it migrated northwards during the Neogene.
| Item Type: | Article |
|---|---|
| Keywords: | Karacadağ Volcanic Complex, Plateau basalt, Southern Turkey, Intraplate, Arabian Plate. |
| Full text: | (AM) Accepted Manuscript Download PDF (1697Kb) |
| Status: | Peer-reviewed |
| Publisher Web site: | http://dx.doi.org/10.1016/j.lithos.2012.05.004 |
| Publisher 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 reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Lithos, 146-147, 2012, 10.1016/j.lithos.2012.05.004. |
| Date accepted: | No date available |
| Date deposited: | 29 July 2014 |
| Date of first online publication: | August 2012 |
| Date first made open access: | No date available |
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