Akademik Veri Yönetim Sistemi
JOURNAL OF ASIAN EARTH SCIENCES, cilt.179, ss.80-98, 2019 (SCI-Expanded)
The Karaburun Peninsula, which is considered to be a part of the Anatolide-Tauride Block, is situated between western Anatolia and the eastern part of the Aegean Sea, in a post-collisional extensional environment, and is located within the Izmir-Balikesir Transfer Zone. The Paleozoic - Mesozoic basement rocks of the peninsula are cut and covered by Miocene volcanic successions, comprising mostly andesitic lavas and volcanoclastic deposits that interfinger with detrital lacustrine deposits. A NW-SE elongated andesitic exogenous composite lava dome structure (major axis is 4 km and minor axis is 1 km) was identified and dated to be 16.39 +/- 0.34 Ma in age. It cuts and covers the Algal andesitic pyroclastic and epiclastic deposits of the Ildir peninsula. Internal structures and igneous fabrics indicate a composite exogenous lava dome structure with short distance lava flows over a flat floor of Algal ignimbrite. Emplacement of this Ildir composite lava dome was controlled by fissure-like volcanic activity along multiple fault lineaments as a result of extensional duplex negative palm-tree lineaments which are related to the Miocene NW-SE directed sinistral strike-slip transtensional fault zone of the Karaburun peninsula. Comparison of the andesitic Ildir lava dome to all volcanic rocks of the Karaburun peninsula implies that the parental (more mafic) magma which formed the lava dome was generated by partial melting of a highly contaminated mantle source which had been modified by subduction-derived fluid/melt components. The Ildir melts were subsequently differentiated by fractional crystallization and crustal assimilation processes in the crust.