Application of gas geochemical exploration in the exploration of sandstone type uranium deposits in the Ba-Mai region
Gas geochemical measurement method is a relatively efficient method for surface soil exploration in basin areas.Tarim basin is regarded as the potential area for sandstone type uranium deposits,but the relatively complex geological structure,thick sedimentary strata and the desert constrain the exploration methods and level.In this paper,the regional(line)geochemical measurement of H2S,CH4,H2,CO2 and 4He was conducted to indicate the deep geological environment for uranium mineralization information in the Bachu Uplift Maigaiti Slope Zone(Ba-Mai region).Several soil gas concentrations clearly presented the respective abnormal distribution ranges in the buried strata.Based on the comprehensive analysis on geological conditions such as fault distribution,oil and gas reservoirs,hydrology,and gas chemical reaction properties,the characteristics and the genesis of gas concentration anomalies were analyzed with the relation of uranium mineralization formation.Gas component concentration anomalies in the northeastern part of the survey area,as well as some sectors sandwiched by the Selibuya and Bashto faults,were found superimposed by several gases,which may be related to the developing oxidation and reduction geochemical barriers favorable for sandstone uranium mineralization.Therefore,the study result provided reference for the exploration of sandstone type uranium deposits in the area.
Tarim basinBachu uplift Maigaiti slope zonegas geochemical explorationsandstone type uranium depositfavorable areas for prospecting and prediction
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