Geochemistry of the Middle Miocene Collision-related Yamadagi (Eastern Anatolia) Calc-alkaline Volcanics, Turkey
Abstract
Major, trace element and K-Ar age determinations are reported for a suite from the Yamadagi volcanics in the Eastern Anatolia. The exposed rocks mainly consist of medium-potassium calc-alkaline basaltic andesites, andesites and dacites. Petrographical data exhibit disequilibrium mineral textures, such as resorption of the ferromagnesian phases, clinopyroxene-mantled orthopyroxene, and sieve-textured plagioclases. The Yamadagi volcanics have a calkalkaline character, and trace element characteristics exhibit that the volcanics resemble subduction zone volcanics and/or volcanics assimilated by continental crust. K/Ar age determinations show that the Yamadagi volcanics were formed during the 12 +/- 0.5 - 15 +/- 0.5 Ma time interval. Geochemical characteristics of these volcanics can be attributed to complex petrogenetic processes, including magma mixing and crustal assimilation along with fractional crystallization.
Source
TURKISH JOURNAL OF EARTH SCIENCESVolume
18Issue
4Collections
- Makale Koleksiyonu [5200]
- Makale Koleksiyonu [5745]
- Öksüz Yayınlar Koleksiyonu - WoS [6162]