A relatively simple method of sulphur determination in drill cores of calcium carbonate matrix is described. The method is
based on the combination of measurements of backscattered beta-particles and transmitted low energy gamma-radiation intensities.
The transmitted gamma-radiation measurement corrects the errors of sulphur determination caused by the varying strontium sulphate
and silicon dioxide content. The method has been tested on 170 samples. It was estimated that the standard deviation of sulphur
determination does not exceed 2.5% of sulphur. The apparatus for routine absorption measurement is also described.