Magma transfer and emplacement processes in collapsing orogens

The proposed project will explore long-range vertically extensive magma transfer processes linking lower crustal source regions with volcanism at the Earth's surface. We will focus on Early Carboniferous late-Variscan post-orogenic magmatic complexes in the Bohemian Massif that are exposed at different crustal levels. Our multidisciplinary research approach will include field and structural mapping, analysis of anisotropy of magnetic susceptibility (AMS), high-precision radiometric dating using the CA-ID-TIMS, and whole-rock major trace element and Sr, Nd and Pb radiogenic isotope geochemistry. Moreover, we will employ analogue modelling combined with the AMS to simulate rather poorly constrained magma transfer process: diapiric upwelling, helical magma flow and ring dikes. Based on field studies and laboratory experimentation, we aim to develop a conceptual mechanical model of magma transfer through the Earth's crust. In addition, we plan to investigate the causes of spatial–temporal–compositional trends of post-orogenic magmas in the Variscan Bohemian Massif.