Abstract Based on studying spectral characteristics of sandstone that has undergone reducing alteration of gas
and oil in the Bashibulake ore district, this paper has dealt with the technologies of reverse enhancement based
on ETM data and the direct enhancement based on ASTER data for extracting the reducing alteration information from
Cenozoic strata, and analyzed distribution features of the alteration information. It is discovered that the
sandstone in the west part of the narrowly-exposed NWW-trending Cenozoic strata has undergone strong reducing
alteration of gas and oil, but the middle and east parts have experienced less alteration. The result provides
some important information for uranium exploration in the periphery of the Bashibulake uranium ore district.
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