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| The terrain interference to radon measurement in sandstone-type uranium deposit and its correction method |
| ZHAO Ning-Bo, FU Jin, LIU Tao, ZHANG Dong-Hui |
| National Key Lab of Remote Sensing Information and Image Analysis Technology,Beijing Research Institute of Uranium Geology,Beijing 100029,China |
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Abstract There exists intimate relationship between the ground radon concentration and the terrain, and the transformation effect of the terrain can destroy the objective form of radon concentration. Through discussing the cause of the terrain interference effect in combination with an analysis of the measured ground radon and radium data, it is considered that the surface radon anomaly is mainly formed by the decay of nanometer 238U and 226Ra which is transported to the surface by relay transmission. In order to suppress the terrain interference, the authors adopted the subarea median contrast filtering method for radon concentration data processing, and the results show that, on the basis of retaining high anomalies, the weak abnormal information can be enhanced, and new ore-related anomalies can be delineated, which suggests that good application effect can be achieved.
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Received: 04 July 2016
Published: 20 August 2017
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