基于放射性地球物理的深部砂岩型铀矿化信息提取技术  

Extraction technology about the information of deep sandstone type uranium mineralization based on radioactive geophysical method

作　　者：李必红[1] 吴慧山[1] 赵丹[1] 杨龙泉[1] 

机构地区：[1]核工业北京地质研究院,北京100029

出　　处：《地球物理学进展》2016年第2期683-687,共5页Progress in Geophysics

摘　　要：为了构建深部砂岩型铀矿化信息提取技术,本文论述了基于放射性地球物理方法提取深部铀矿化信息的理论基础,采用氡异常二维栅格衬度、分形滤波、氡与计算氡比值等方法对我国二连盆地及准噶尔盆地实测土壤氡浓度数据进行了处理,同时,应用证据权重法,集成地质、土壤氡、车载伽马全谱、航空伽马能谱等成矿有利信息图层,开展了多元信息定量化提取技术应用研究,通过数据处理,表层信息得到了有效压制,排除了氡异常的漂移或假异常,处理后的异常信息与矿体在地表的垂直投影及控矿构造正相关,为我国北方深部砂岩型铀矿找矿工作提供了技术支撑.In order to built a set of deep sandstone type uranium mineralization information extraction technology by radioactive geophysical data processing,this paper discussed the theoretical basis about the extraction technology of uranium mineralization depth information based on radioactive geophysical methods,Using the methods of radon 2D grid contrast,fractal filtering,the ratio of radon and calculation radon to process the data of soil radon concentration measured in Erlian Basin and Junggar basin,and with weights of evidence,the technology of multi-information quantitative extraction was carried out which integrated favorable mineralization information layers of geology,soil radon,car borne gamma ray full spectrum,airborne gamma ray spectrum,and so on,all the results showed the surface information has been effectively suppressed and the signal to noise ratio of deep mineralization information improved,the radon anomalies drift or false anomalies have been excluded and the anomaly of processed data are related to the vertical projection of the orebody or ore-controlling structure,which provided technical support for deep sandstone type uranium deposits exploration.

关 键 词：土壤氡浓度 氡衬度 分形滤波 多元信息提取 深部铀矿化信息 

分 类 号：P631[天文地球—地质矿产勘探]