Tesauro, M. , Maierová, P. , Koptev, A. , Pastorutti, A. , Pivetta, T. , Koulakov, I. and Braitenberg, C. 2024. What controls structural variations along the Zagros Collision Zone? Insights from geophysical observations and thermo-mechanical modelling. Gondwana Research. 133.
DOI Google ScholarOrigin of the relaminant in the Bohemian Massif during the Variscan orogeny
The granulite-gneiss extrusions in the Bohemian Massif are interpreted as parts of the lower plate, subducted, relaminated below the upper plate and exhumed as kilometre-scale translithospheric diapirs through upper plate. Because dominated by metagranites, it is repeatedly stated that they originated from continent subduction. Many studies were dedicated to their tectono-metamorphic Variscan evolution. Almost missing are studies trying to understand their paleo-environment that allowed such unprecedented travel of rocks through mantle. We aim to question the paradigm of their continent origin, by testing also other hypothesis that include subduction of magma-poor or magma-rich passive margin, and continental or oceanic magmatic arc. For decisions about the paleo-environment type, we will correlate the age and isotopic pattern in protolith and inherited zircon in metamorphosed magmatic rocks and in detrital zircon in metasediments, and whole rock geochemical and isotopic fingerprints, with units recently identified as magmatic arcs and possibly as magma-rich passive margin.