Abstract
Molecular biomarkers are the important maturity parameters for sedimentary organic matter. They have also been widely used for determining the maturity of organic matter in ore deposits. However, during the study of organic matter in the Kupferschiefer from the Lubin mine, it had been found that the biomarkers were influenced by sulfide formation. In order to probe into the degree of influence on biomarkers, seven samples collected from a Kupferschiefer section from the Lubin mine were analyzed by various geochemical methods. The results indicated that in the samples with higher copper contents, the values of biomarkers are lower than in the samples with lower copper contents. In highly mineralized samples, hydrogen donation for thermochemical sulfate reduction (TSR) occurred in alkylated phenanthrenes and naphthalenes, leading to the decrease of 12 biomarker parameters during the Kupferschiefer mineralization.
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Financial supports of this study by the NNSFC Project (No. 40173004) and the National Major Fundamental Research and Development Project (No. 2003CB214607) are gratefully acknowledged.
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Yuzhuang, S., Jianping, C., Mingyue, L. et al. Influences of ore formation on biomarkers in the Kupferschiefer from the Lubin mine, Poland. Chin. J. Geochem. 24, 101–107 (2005). https://doi.org/10.1007/BF02841152
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DOI: https://doi.org/10.1007/BF02841152