نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانش آموخته کارشناسی ارشد دانشگاه تهران
2 دانشکده مهندسی معدن، دانشگاه تهران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Singularity is the characteristic of various non-linear phenomena, such as hydrothermal processes in the Earth's crust, which produce deposits with high concentrations of metals. The final result of these processes is the appearance of fractal or multi-fractal features, and there are several methods to identify these features. The singularity distribution mapping method is one of the multi-fractal analyses developed on the basis of the singularity index and as a tool for separating anomalies from the background or for separating local anomalies from a region. In this study, the multi-variable singularity mapping method was used to determine geochemical anomalies and structural features and to establish the relationship between elements in the QaraCher exploration area, 42 km southwest of the city of Saqez in Kurdistan province. The database included 1104 lithogeochemical samples with 10 analyzed elements, including Au, As, Ag, Cu, Sb, Sn, Bi, Mo, Zn, Pb. Due to the compostitional nature of the variables and subsequent false correlations in the closed system, principal component analysis (PCA) was applied to the data under isometric log ratio (ilr) transformation, and according to the results, the relationship between As and Cu on the first principal component and the second principal component shows the independent function of gold in the study area. The application of the singularity mapping method has highlighted promising and potential areas for future explorations that are very reliable according to the consistency of the results with phyllic alteration and iron oxide, sulphide ores and high-grade gold cells. In conclusion, the results show that this region has two different types of mineralization, namely high thermal and mesothermal in the southern half and hydrothermal to mesothermal in the northern half.
کلیدواژهها [English]
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