Geochemistry and Tectonic Environment of the Şarkışla Area Volcanic Rocks in Central Anatolia, Turkey

E. Gökten and P. A. Floyd
Geological Engineering Department, Ankara University, Beşevler, Ankara, Turkey
Department of Geology, University of Keele, Staffordshire ST5 5BG, UK

Abstract: The volcanic rocks of the Şarkışla area in northeastern central Anatolia are associated with volcaniclastics, turbiditic limestones and pelagic-hemipelagic shales of Upper Cretaceous-Palaeocene age. A preliminary geochemical study was undertaken to constrain local tectonic models, and due to the variable altered nature of the volcanics, determine the lithological composition and magma type. Chemically the volcanics are an andesite-dominated suite of calc-alkali lavas, probably developed adjacent to an active continental margin in a local (ensialic back-arc?) basinal area. The volcanic activity was probably related to a postulated magmatic arc just south of the area during the early Tertiary.

Keywords: volcanic rocks • geochemistry • tectonics • Anatolia • Turkey

Mineralogical Magazine; October 1987 v. 51; no. 62; p. 553-559; DOI: 10.1180/minmag.1987.051.362.09
© 1987, The Mineralogical Society
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