Textural and Mineral Chemistry Data Related to the Karapinar-Karacadag Volcanic Complex (Konya-Central Anatolia)

Abstract

The Plio-Quaternary associated with the Karapinar-Karacadag Volcanic Complex (Konya-Central Anatolia) involves dacitic-andesitic domes/flows and basaltic lava flows, and their pyroclastic equivalents (e.g., base surges, ash-block flows, scoria and ash falls). The present study deals with examining the new mineral chemistry and textural investigations concerning the Karapinar mildly alkaline to calc-alkaline basalts and Karacadag calc-alkaline intermediate rocks predominant in Central Anatolia. Application of amphibole thermobarometry and clinopyroxene-liquid thermobarometry to the Karacadag andesites has yielded temperature estimates in the range of 855–1198 °C and pressure estimates of a range of 1.34–5.95 kbar, indicating the presence of a magma chamber lying at the middle-upper crust for intermediate unit. Temperature and pressure estimate’s as drawn from pyroxene, related to the Karapinar basalts are in the range of 1173–1251 °C and 8.9–12.2 kbar, highlighting persistence of crystallization at the crust base level. Some of the andesites, particularly the enclave bearing andesites, enclose spongy cellular, fine-coarse sieved, oscillatory and inverse zoned plagioclase, standing as the evidence of open system process. Besides, the Karapinar basalts include abundant quartz and biotite xenocrysts. There is no physical contact between the Karacadag andesites and the Karapinar basalts surrounding the area, but the relating geochemical and textural properties appear to indicate that the Quaternary Karapinar basalts prove to be evidently assimilated from Pliocene associated with the Karacadag andesites.