Hydrothermal Mineralization Beneath the Upper Silesian Basin, Czech Republic: The Record of a Possible Tectonic Driving Fluid Flow

fabrics in the core of the vast majority of the pluton. These fabrics are overprinted by flat submagmatic to solid state shear zones which are locally dominant. This pattern reflects an early E-W shortening of orogenic root associated with extrusion of the lower crust lubricated by sills of mantle – derived melts. The magma ascended vertically along pre-existing vertical anisotropies and major thrust boundaries forming positive flower structure. Subsequent large – scale wrenching is responsible for sinistral rotation of