基于GIS的多元信息成矿预测研究——以通辽地区北部砂岩型铀矿为例

Synthetic Informational Mineral Resource Prediction Using GIS:A Case Study of Sandstone Type Uranium Deposits in North of Tongliao Region

在总结通辽地区北部砂岩型铀矿成矿规律和矿床特征的基础上,利用GIS平台提取地质、地化环境、地面放射性异常、航磁、重力异常等多元找矿信息,依据矿产预测模型,采用网格单元及地质体法开展找矿预测研究。结果显示,研究区内已知矿床(点)均落在预测的6片靶区内,并在野外工程验证中发现了较好的铀矿(化)体。表明本次成矿预测研究采用的方法及模型正确、有效,可为该地区砂岩型铀矿勘查工作提供理论指导。

On the basis of summarizing the metallogenic rules and characteristics of the sandstone-type uranium deposits in the northern part of Tongliao,multiple information,such as geology,geochemistry environment,surface radioactive anomalies,aeromagnetic fields and gravity anomalies has been extracted through GIS platform.According to the mineral prediction model,the exploration of prospecting area is carried out by the methods of grid unit and geological volume.The results show that the known deposits(points)in the study area are all located within the predicted 6 target areas,and good uranium deposits(mineralization occurrences)have been found during the field work.It indicates that the methods and models used in this prospecting study are correct and effective,which can provide a theoretical guidance for the exploration of sandstone-type uranium deposits in this area.