关键词: 碳硅泥岩型铀矿, 成矿特征, 伽马能量谱

Abstract: Southwestern Anhui is an important part of Xiushui-Ningguo uranium metallogenic belt in China.In recent years，a large number of carbonaceous siliceous mudstone type uranium deposits，uranium mineralization points and anomalies have been found in this area，which has important uranium resource po⁃ tential and research value.Taking the carbonaceous siliceous mudstone type uranium deposit in southwestern Anhui as the research object，the regional metallogenic geological environment，uranium metallogenic char⁃ acteristics and geochemical characteristics are systematically analyzed，and the regional uranium metallo⁃ genic regularity is summarized. Combined with the relationship between strata，structure，magmatism and uranium mineralization，the metallogenic mechanism is analyzed，and the regional uranium mineralization model is constructed. Uranium mineralization is controlled by Sinian-Cambrian strata. The NE-NNE deep fault in the area provides a channel for the activation，migration and enrichment of uranium elements. The magmatic activity in Yanshan-Himalayan period provides heat source and part of uranium source for urani⁃ um mineralization. The occurrence forms of uranium deposits are divided into two types of independent min⁃ erals and adsorption forms. The results show that the formation of carbonaceous siliceous mudstone type ura⁃ nium deposits in southwestern Anhui is a comprehensive reflection of sedimentation，leaching and later hy⁃ drothermal superposition. The metallogenic process is controlled by stratigraphic distribution，tectonic activ⁃ ity and magmatic hydrothermal action.

Key words: carbon silicon mudstone type uranium deposit, metallogenic characteristics, energetic spectrum of gamma code