X荧光分析技术在航磁异常地面查证中的应用

The Application of Radioactivity Exploration Method for Aeromagnetic Anomaly Verification

西天山135号航磁异常点由于地质条件的限制,大型勘查设备测量和探槽揭露工作很难开展;此外,受气候条件限制,适合查证工作的时间较短。因此,采用X荧光分析技术结合传统物探方法的技术路线,在航磁异常查证阶段综合采用地面高精度磁法测量、γ能谱测量、野外现场X荧光快速分析和岩样物性分析方法完成航磁异常的检查。根据野外X荧光分析发现135号航磁异常西南部有新的铜元素含量异常点,结合现场踏勘捡样发现孔雀石矿化现象,判断135号航磁异常西南部有铜矿化点的存在。在铜矿化区域通过大比例尺现场X荧光分析快速定位两处新发现的铜异常,并圈定了矿化范围;在工程验证阶段采用"以钻代槽"技术,结合X荧光分析和微区X荧光分析方法研究矿化展布特征、矿物成分,评价矿化价值。通过135号航磁异常查证工作,结果表明X荧光分析技术是一种快速高效、经济的勘探方法,能够缩短野外勘查周期,高效地完成异常查证及矿产勘查工作。

No.135 aeromagnetic anomaly point is located in West Tianshan Mountains. Due to geological and climatic conditions, large-scale exploration equipments are difficult to be used and excavation of the trial trench trenches is difficult to be carried out. Therefore, a traditional geophysical method has been designed with ground high-precision magnetic survey, gamma ray spectrometry, in-situ X-ray fluorescence analysis and physical properties analysis of rock samples. The copper mineralized points were found in the southwest of No.135 aeromagnetic anomaly point by and the malachite mineralization was discovered by site reconnaissance. Two copper anomalies were aslo found. The range of the mineralization was delineated. It＇s proved that the radioactive prospecting method is an efficient and economic exploration method.