The invention relates to the technical field of mineral
geological exploration and particularly discloses an
environmental index method for dividing epigenetic alteration of in-situ leaching sandstonetype
uranium ore rocks. The method comprises steps of 1, setting a rock environment index sample; 2, performing field on-site sampling; 3, carrying out experimental analysis on the sample, feeding the sample into a laboratory in time after sample sampling, and carrying out rock specific potential determination
delta Eh, low-valence
sulfur S2- analysis and organic carbon Cy analysis; and 4, analyzing, sorting and utilizing experimental data. The method is advantaged in that three kinds of rock environment index
analysis data such as the rock specific potential
delta Eh, low-valence
sulfur S2-and organic carbon Cy which are slightly influenced by air are selected for combined judgment, the rock geochemical environment can be accurately judged, the rock epigenetic alteration intensity can be determined,
zoning property of a rock epigenetic alteration zone of the in-situ leaching sandstone type
uranium ore is researched, judged and divided, quantitative gamma
logging data is combined,
uranium-bearing property and uranium enrichment factors are analyzed, and the
uranium ore occurrence position is accurately captured.