Akademik Veri Yönetim Sistemi
26th EM Induction Workshop, Beppu, Japonya, 7 - 11 Ekim 2024, ss.1-4
The Kula volcanic area in western Turkey is a rare location globally where the asthenospheric mantle source is melting, leading to volcanic eruptions. The main aim of this study is to investigate the magma pumping system underlying the Kula Volcanic Area (KVA). For this purpose, we conducted an MT survey of a 60 x 60 km2 area surrounding KVA. The MT data were acquired from 126 broadband and 13 long-period MT stations. After editing, we used 13 Long Period and 92 broadband MT stations data in 3D inversion. The 3D resistivity model was obtained for 60 km depth. The resistivity model demonstrates the presence of complex distributed asthenospheric melts spread through the crust, reaching depths of up to 40 km below the KVR.
Through inversion analysis, significant pure and partially molten magma zones have been delineated. This is exhibiting varying resistivity values and geometries, including elongated tabular structures and spherical bodies, distributed across the Kula volcanic field. The distribution of these melting zones reaching ~1400 km3, particularly those characterized by resistivity values of 3-5 Ω m, suggests dynamic processes of magma ascent and redistribution within the crust, potentially influenced by specifically post-exhumation tectonics of Menderes massif since 2 My. This study revealed the presence of east-west directional extensional tectonics surrounding the KVR, a phenomenon seen for the first time in the last 2 My and driven by the force of north-south directed vertical tearing.