摘要
为查明西藏谷露地热田隐伏断裂构造,在研究区开展了土壤氡气测量工作,确定了土壤氡异常展布特征,分析解译了8条隐伏断裂构造的位置、走向和活动性。研究表明,各子区土壤氡背景值有很大差异,分区分段提取剖面异常信息和异常衬度法能有效识别土壤氡异常;泉华边缘环状氡异常是热显示中心处的氡气向边缘发生迁移扩散的结果;条带状、串珠状氡异常主要受断裂构造控制;氡异常宽度、峰背比和平均异常衬度能很好地反映断裂构造的活动性。推断解译的SN向主断裂构造F4得到钻探验证并获得高温地热资源,为谷露地热田的地热资源勘查工作提供了参考。
In order to find out the buried fault structures of Gulu Geothermal Field in Tibet,the soil radon measurement technology was carried out in the study area,the distribution characteristics of soil radon anomaly were determined,and the location,strike and activity of eight buried faults were interpreted and analyzed.The results showed that the background values of soil radon in different sub areas are quite different,and the method of extracting abnormal information from the profile by sections and anomaly contrast can effectively identify the soil radon anomaly.The annular radon anomaly at the edge of sinter is the result of the migration and diffusion of radon from the center of thermal display to the edge.The zonal and beaded radon anomalies are mainly controlled by faults.Radon anomaly width,peak to back ratio and average anomaly contrast can well reflect the activity of fault structure.It is concluded that the interpreted main fault F4 in the north-south direction has been verified by drilling and high-temperature geothermal resources have been obtained.The soil radon measurement technology provide a reference for the geothermal resources exploration in Gulu Geothermal Field.
作者
吴儒杰
孙国强
万汉平
谢迎春
赵丹
王宗满
李玲
李斌
WU Rujie;SUN Guoqiang;WAN Hanping;XIE Yingchun;ZHAO Dan;WANG Zongman;LI Ling;LI Bin(Beijing Research Institute of Uranium Geology,Beijing 100029,China;CNNC Geothermal Exploration Technology Center,Beijing 100029,China;CNNC Kunhua Energy Development Co.,Ltd.,Hangzhou,Zhejiang 311101,China)
出处
《世界核地质科学》
CAS
2022年第1期89-96,共8页
World Nuclear Geoscience
基金
中核集团集中研发项目“地热勘查开发利用关键技术研究(中核科发[2019]419号)”资助。
关键词
地热资源勘查
谷露地热田
土壤氡气测量
隐伏断裂
氡异常
geothermal resources exploration
Gulu Geothermal Field
soil radon measurement
buried fault
radon anomaly
