Akademik Veri Yönetim Sistemi
TECTONOPHYSICS, cilt.920, 2026 (SCI-Expanded, Scopus)
The Kula Volcanic Province (KVP) in western Anatolia represents the youngest expression of intraplate volcanism within the Aegean extensional province. Yet, the geometry and depth of its magma storage system have remained poorly constrained. Here we present the first three-dimensional magnetotelluric (MT) inversion of the region, based on a dense dataset of 105 stations across similar to 60 x 60 km(2). The results reveal a major mid-crustal reservoir, similar to 75 x 20 km in extent and emplaced between 5 and 25 km depth, accompanied by several smaller chambers up to 12 km across. Diapir-like protrusions extend from these bodies to depths of similar to 5 km, their NNW-SSE orientation closely aligned with the fault architecture of the Gediz Graben. Resistivity values below 5 Omega.m correspond to melt fractions exceeding 6-8 %, providing robust geophysical evidence for significant partial melts in the mid-crust. Petrological constraints indicate primary melts originated from the asthenospheric mantle at 65-90 km depth, while the anomalies resolved here represent secondary crustal reservoirs where ascending basaltic magmas became trapped and stabilised. This dual structure-deep mantle melting coupled with mid-crustal storage-reconciles geochemical constraints with geophysical imaging and highlights the segmented nature of the system, in which one dominant reservoir is compartmentalised by regional fault networks into smaller magma bodies. These findings provide the first direct evidence for fault-controlled magma storage beneath the KVP. The identification of shallow intrusions reaching similar to 5 km depth explains the localisation of Holocene volcanism, including the similar to 4.7 ka Cakallar eruption, and points to a latent volcanic hazard. Placed in a global context, the KVP demonstrates how asthenospheric upwelling, lithospheric thinning, and tectonic segmentation combine to generate compartmentalised magma systems in highly extended continental crust.