Abstract：This paper presents the geology of Xinchang section，one of the candidate areas in Beishan region in Gansu Province，China，for disposal of high-level radioactive waste；and the latest progress in the field of site selection in China is also introduced. With the help of TM satellite image interpretation and geological survey，space-time characteristics of the granite and faults in Xinchang section are investigated. According to the criteria and methodology of intrusive rock hierarchical unit，there are 3 granite super-units and 3 dependent units. Forty sets of faults are recognized and their scale，attitude，mechanical property and fracture strength are investigated. Based on the above results and the criteria adopted from other countries，two blocks，i.e. Jijicao and Xinchang，are selected. With the help of high resolution satellite image(i.e. Quick Bird in U.S.A.) interpretation and surface engineering exposure，border faults and inner faults of these two blocks are investigated. Dominant group，average spacing and average length of joints are carried out with statistical analysis using data measured from 837 outcrops in these two blocks. As a result，both blocks can be regarded as candidate sites for high-level radioactive waste repository；and next research stage，e.g. borehole survey，is under operation. In addition，it is proven that the block selection is such an efficient method that it can provide more detailed data for the next borehole survey.
