Abstract
The chapter presents the results of sulphur isotope composition measurements (δ34S, in ‰), which showed that in rich intrusions sulphur is in most cases isotopically heavy (δ34S = 9–13, average about 11‰), and in this parameter corresponds to the crustal source, apparently, in most cases, sedimentary anhydrite with δ34S = 16.5 ± 1.5. The sulphur from medium and poor intrusions is indistinguishable by the isotopic composition and is characterized by a much lower δ34S with a wide range of variations (0–9‰). Clear regularities in the distribution of sulphur isotope composition along the section of intrusions have not been revealed. The criterion should be considered as additional because of the possible fractionation of sulphur isotopes in the formation of ores. Thus, in the richest intrusions, sulphur, like helium, is of predominantly crustal origin; it appears to have been borrowed from anhydrites of the enclosing strata as a result of intensive migration (circulation) of water caused by injection. The origin of sulphur in poor and medium intrusions remains unclear. It is possible that some of the sulphur has a mantle genesis.
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Prasolov, E., Khalenev, V., Belyatsky, B., Prilepsky, E., Nazarova, T. (2019). Sulphur Isotopes. In: Petrov, O. (eds) Isotope Geology of the Norilsk Deposits. Springer Geology. Springer, Cham. https://doi.org/10.1007/978-3-030-05216-4_2
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DOI: https://doi.org/10.1007/978-3-030-05216-4_2
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