Retrieval of Clay Minerals from Hyperion Data in Dexing Mine, Jiangxi Province and Its Prospecting Significance

Dexing mine is significant in China, but its resources is endangered with exhaustion, which means it is important to tap the alternative mines. A prediction equation is established in this study by deriving the absorption position of the spectrum in the measured soil data by continuum removal and analyzing the reflectivity of these positions responding to specific clay minerals, using the three clay mineral contents as the dependent variables. It is found that kaolinite retrival correlation coefficient R is 0.811, fitting coefficient R² is 0.658, F is 5.275, Sig is 0.047 7 < 0.05; chlorite retrival correlation coefficient R is 0.893, fitting coefficient R² is 0.797, F is 1.602, Sig is 0.016 6 < 0.05; ilitte retrival correlation coefficient R is 0.783, fitting coefficient R² is 0.619, F is 5.57, Sig is 0.075 4 > 0.05. The testing indicates the independent variable well correlated to the dependent variable, and the inversion accuracy is high. The results indicate that the ensemble content of kaolinite is higher and distributed more widely, compared with chlorite and illite. Overall, the contents of three clay minerals at tailings dam, Ⅱ tailings dam, Ⅳ tailings dam and copper mine are relatively low. The clay mineral accumulated to pyrite, chalcopyrite and hematite by geochemical changes. The resources prediction area is selected, which have high clay minerals and activity geological structure, located on the northeast of IV tailings dam.