Lithium concentrations and isotopic compositions in rocks are used for characterization of the protolith or indication of metasomatic and devolatilization processes. The knowledge of Li behaviour in metamorphic rocks is limited, especially the Li partitioning between coexisting minerals with respect to metamorphic reactions and PT conditions. The aim of the PhD project is to study a set of rocks covering various types of lithologies along continuous metamorphic path up to ultra-high-pressure conditions in a continental subduction. The project tasks include characterization of metamorphic evolution and identification of coexisting minerals along the subduction PT path, determination of whole rock element and isotopic composition, and in-situ analysis of Li contents in coexisting minerals and Li isotopic compositions in garnet. Important part of the project is a development of analytical procedure for in-situ Li isotope analysis of garnet including the reference material preparation. The suitable set of samples comes from the Erzgebirge region in the Saxothuringian domain.
- zadáno a potvrzeno stud. odd.