The base of geological sections of petroliferous provinces in compositionally different rocks contains an anthraxolite-asphaltite carbonaceous material that does not fit the classical models of naphthide or naph-thoid formation. The complex nature of such material is related to the extreme variability of its chemical composition that is inconsistent with physiochemical properties and the associated (not always) hydrothermal mineralization as various sulfides, carbonates, quartz, rare metal-phosphate assemblages, and U-bearing minerals. Study of the geochemical properties of such bitumens with the neutron activation method was hampered for a long time by the high content of radioactive elements (primarily U). During irradiation in a reactor, uranium generates a wide range of radionuclides, spectra of which are overprinted on lines of the major microelements. Implementation of the ICP-MS method in research works makes it possible to avoid such overlaps and refine significantly the precision of analysis and the increase in the number of analyzed metals.
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