Lithospheric Cliff‐Induced Asthenospheric Upwelling: Insights From High‐Resolution Broadband Lg Attenuation Structure Beneath the Carpathian‐Pannonian Region

Although many intraplate basaltic volcanic eruptions are now recognized as unrelated to mantle plumes, the mechanisms driving these eruptions remain unclear, particularly in the Carpathian–Pannonian Region. A high‐resolution broadband Lg‐wave attenuation model for this region is constructed to constrain the underlying mechanisms of intraplate magmatism. Strong Lg attenuation is observed in late‐Cenozoic magmatic provinces. The strong attenuation observed in the western Pannonian Basin is consistent with steep sub‐lithospheric topography, suggesting that shear‐driven asthenospheric upwelling beneath the Eastern Alps and European Platform triggers crustal partial melting and basaltic magmatism. In the southeastern Carpathians, enhanced attenuation is associated with mantle flow induced by slab rollback, which promotes lithospheric reworking, fluid release, and partial melting of the crust. Our findings link late Cenozoic magmatism to asthenospheric upwelling by characterizing the lithospheric thermal structure and provide new constraints on the mechanisms driving intraplate volcanism.