Petrothermal power stations (EGS, Enhanced Geothermal Systems) will be established in massive rocks. Initially two boreholes will be sunk at depths which correspond to specified temperatures. The way to construct such a heat exchanger has not yet been satisfactorily resolved. Given the large potential attributed to the EGS technology in general, the Free-State of Saxony in Germany has started an initiative to set up a research and development campaign to determine the most effective means of utilizing its’ deep geothermal EGS potential. This project will be carried out in crystalline rocks comparable to other projects conducted in the world,so that cross correlations are to be expected. Here, we report first results from the exploration including thermal rock parameters,thermal models, the modern stress field, and geo-mechanical parameters. In this first stage, the Free State of Saxony plans, in Close cooperation with research institutions within the research network of “Tiefengeothermie Sachsen”, to sink an exploration well with the intention of establishing a deep-petrothermal project. The principle idea of this enterprise is to utilize one or more faults or fault zones as a natural heat exchanger.