X-ray fluorescence logging in molybdenum deposit exploration

Described is the methods for X-ray fluorescence logging in molybdenum deposit exploration in South Kazakhstan. X-ray fluorescence logging was carried out with GKS-1N four-channel gamma spectrometer with SP-4 hole device containing clamping. 109Cd isotope of 10μCi activity was used as a source for excitation of characteristic radiation of molybdenum K-line (E=22 keV, T=470 days) and a proportional counter with the resolution of 12% along 125Sb (E=27 keV) line was used as a detector. Described are methods for interpretation of X-ray flUorescence logs using a nomogram for molybdenum determination in holes filled with water. The sensitivity threshold is 0.05% of molybdenum. Economic efficiency of deposit exploration with the help of holes and subsequent X-ray fluorescence logging is 2.8 mln roubles