Abstract：As its difficult to identify the isomorphous minerals under the microscope,in order to determine the abnormal elements and their positions in the mineral specimens the qualitative scan and distribution analysis of the main elements and the associated elements in such tungsten ores as wolframite ((Fe,Mn) WO4) and scheelite (CaWO4) were conducted with the microanalysis capacity of X-ray fluorescence spectrometer and then in the critical measurement areas at those positions the qualitative analysis was conducted to obtain the contents of the mineral components. Finally the coordination number of each component was calculated,and the ore was denominated according to the theoretical values of the mineral component contents. According to the scanning images of the mineral specimens,the analytical spectral lines,the background points,the energy windows and the measurement modes were selected with emphasis to effectively avoid interference. The overlapping interference,matrix effect and mineralogical effect for spectral lines were carefully studied,and the appropriate calibration methods were selected. The correlation coefficient of the calibration curve for each main measurement component was larger than 0.999. The precision of the quantitative identification method was investigated and the relative standard deviation (RSD,n=12) for each component was less than 4%. The experimental method was applied to the determination of wolframite and scheelite specimens and the quantitative identification results were compared with electron microprobe analysis results. Its found that the relative deviations (RD) of the identification results of the major components of three mineral specimens were less than 4% and the three sets of data were exactly consistent.
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