Distribution Characteristics of Gamma-Ray Exposure Rate of Boreholes in Baolongshan Area of Songliao Basin
Huang Xiao1,2, Yang Yaxin3, Wang Dianxue1, Luo Qibin2, Cai Jianfang1 Zhou Wenbo1, Zhang Liangliang1, Yu Honglong1, Ma Zhenyu1
1. Geologic Party No.243，CNNC，Chifeng，Inner Mongolia 024000, China;2. School of Geophysics and Measurement-control Technology, East China University of Technology, Nanchang 330013, China;3. East China University of Technology, School of Nuclear Science and Engineering, Nanchang 330013, China)
Abstract： Gamma-ray exposure rate of boreholes is the fundmental criterior and index for determining thegrade of uranium ore and delineating the boundary of uranium orebody. Based on the collected drilling gamma logging data ， regional and deposit geological data in Baolongshan area ， the background value ，mean-variance and coefficient of variation of gamma exposure rate in boreholes were systematically analyzed in this paper. The distribution characteristics and variation pattern of drilling gamma exposure rate parameters in different strata ， different lithology segments were summarized by combiny with the geological background ， the migration and enrichment law of radioactive elements and the favorable horizon has been identified for uranium enrichment and mineralization. The results showed that in the favorable ore-formingsand bodies ， the mean value of gamma exposure rate of the borehole can reflect the enrichment of radioactive elements in the stratum ， while the mean-variance and coefficient of variation can reflect the uniformity of enrichment and mineralization of radioactive elements in the stratum. The increase ， and stably change of both the mean value ， mean-variance ， and coefficient of variation means the the increase of radioactive elements in the target formation and easy to form industrial uranium ore with high quality. The results of this study can guide the deployment of drilling and improve the efficiency of prospecting.
黄笑1,2, 杨亚新3, 王殿学1，罗齐彬2，蔡建芳1，周文博1， 张亮亮1，余弘龙1，马振宇1. 松辽盆地宝龙山地区钻孔γ照射量率分布特征[J]. 铀矿地质, 2019, 35(05): 305-312.
Huang Xiao1,2, Yang Yaxin3, Wang Dianxue1, Luo Qibin2, Cai Jianfang1 Zhou Wenbo1, Zhang Liangliang1, Yu Honglong1, Ma Zhenyu1. Distribution Characteristics of Gamma-Ray Exposure Rate of Boreholes in Baolongshan Area of Songliao Basin. URANIUM GEOLOGY, 2019, 35(05): 305-312.
2019, Vol. 35 
