摘要：Using gas chromatography-mass spectrometry (GC-MS) sphalerite samples from lead and zinc mines of theSilesian-Cracow region were studied in terms of the effect of organic matter on their coloration. The results indicate nocorrelation between the abundance and chemical composition of organic matter and sphalerite coloration. TOC valuesfor investigated samples are in the range of 0.5-1.28%. A basic feature characterizing all samples is very similar distributionof n-alkanes, with a predominance of short-chain n-alkanes (from n-C13 to n-C21) over long-chain n-alkanes(from n-C25 to n-C35). Among the isoprenoids pristane dominates over phytane (Pr/Ph ratio in one sample is even 8.95),which does not correspond to previous studies (Karwowski et al. 2001) and may be due to the multi-source nature oforganic matter present in sphalerite inclusions from the Silesian-Cracow Zn-Pb deposits. The occurrence of hopaneswith 17β,21β(H) stereochemistry indicates a low maturity of test samples.
关键词：organic matter; color of the sphalerite; Silesia-Cracow Zn-Pb depostis; GC-MS methods
