Study on deep geological environmental characteristics of the Shazaoyuan area

Through surface geological surveys, geophysical measurements, borehole investigations, and 3D geological modeling, the deep geological environment of the Shazaoyuan area has been studied. The lithology, structural spatial distribution, rock integrity at depth, and engineering geological characteristics of the Shazaoyuan area have been preliminarily identified. The main findings are as follows: The granite rock mass in the Shazaoyuan area has a large exposed surface, with relatively uniform lithology, primarily composed of biotite granodiorite of the Shazaoyuan superunit, covering an area of about 330 km². The granite body dips outward and extends to a depth greater than 2 km. There are 12 faults developed in three main orientations: North-northwest, near north-south, and northeast, all with steep dips and intersecting the rock mass. Fractures are well developed in the deep part of the granite, mostly with steep dips and filled with minerals such as calcite and clay. Preliminary delineation has identified more than two favorable rock masses in the pre-selected Shazaoyuan area, which may serve as potential candidate sites for high-level radioactive waste disposal facilities.Though the research, it is proved that the Shazaoyan area has favorable geological conditions for screening the high-level waste disposal bank.