The influence of cdenozoic tectonic activity for uranium mineralization in Xiazhuang uranium ore field

The Cenozoic tectonic activity divided into two types in this paper: strong hydrothermal activity and no hydrothermal activity. The first type, such as Shangdong fault, is dry brittle structure,the original structure had been destructed by Cenozoic tectonic stress. The fault mainly filled with mud, cataclasite, cataclastic granite, no obvious signs of hydrothermal activity, a small rock alteration range. The second type, such as Guiweishan fault, is opposite the first one, the destruction of original structural by Cenozoic tectonic hydrothermal activity was obvious. The fault mainly filled with quartzite, had a wide range of country rock alteration. The mainly influence of uranium mineralization by the Cenozoic tectonic activity is that (1) on both flanks of fault had been differential uplift which could protected (eroded) the ore, (2) Cenozoic hydrothermal activity eroded original ore body, (3) the fracture and secondary fault accumulated secondary uranium ore. (author)