Study on the application effects of in-situ and integrate soil radon measurements in a uranium deposit

In order to compare the application effect of instantaneous and cumulative soil radon measurement, comparative study of the two kind methods had carried out in a southern uranium mine. Measurement of instantaneous radon used silicon semiconductor radon detector, and the cumulative radon measurement used solid state nuclear track detector (SSNTD). The results of in-situ of soil radon measurement and SSNTD in a typical section show that: (1) the ratio of radon anomaly of SSNTD and the radon background is larger (high anomaly contrast); (2) radon anomalies of SSNTD are more obvious than that of in-situ method in the concealed ore deposits, but the curve shape is the same; (3) soil layer thickness have some influence on the radon migration and enrichment; (4) the efficiency of in-situ method is greatly higher than SSNTD. Therefore, radon measurement application is essential in different geological conditions and different exploration cycle according to the target and the geological characteristics of uranium deposit. (authors)