Mass-spectrometric examinations (δ34S) of different baryte, pyrite, galena, sphalerite samples from the ore occurrences in the mixed series at Nežilovo village, Macedonia
In this paper we present the results of the δ 34S-mass spectrometric examinations of different baryte, pyrite, galena and sphalerite samples from the ore occurrences in the mixed series at Nežilovo village, Macedonia. The examined baryte samples (fine-grained and coarse-grained generations in total number of 16 samples) show a very narrow span of the δ 34S (+22.5 to +28.3 ‰ for the fine-grained barytes and +21 to +26 ‰ for the coarse-grained baryte generations). These δ 34S values for the examined barytes samples show a homogenous S-source probably of marine origin—marine sulphates. In five samples of different sulphide minerals: galena, sphalerite, cleiophane (from baryte schists), pyrite (from cymrite-quartz schists) were found very close δ 34S values, varying of +3.3 ‰ to +11.6 ‰. These values for examined sulphides show probably an endogenous-juvenile origin representing volcanic sulphides. Examined pyrite sample with hexahedral forms (from the albite-augen gneisses) shows δ 34S values of -10.5 ‰, being typical for S-source of sedimentary origin.