航磁资料在澳大利亚昆士兰州艾萨山选区成矿预测中的应用  

Application of Aeromagnetic Data in Metallogenic Prognosis of the Mount Isa Selected Area in Queensland,Australia

作　　者：张大莲[1] 盛君[1] 关艺晓[1] 张艳飞[2] 

机构地区：[1]江苏省地质调查研究院,江苏南京210018 [2]中国地质大学(武汉)地质过程与矿产资源国家重点实验室,湖北武汉430074

出　　处：《地质与勘探》2016年第5期992-1000,共9页Geology and Exploration

基　　金：国土资源部国外矿产资源风险勘查专项经费项目:澳大利亚昆士兰州西北部地区艾萨山地区铜多金属矿远景调查(10210A002);中国博士后科学基金(2014T70756)资助

摘　　要：高精度航磁测量相对简单,获得的信息丰富,是开展大面积成矿预测的有利工具。澳大利亚艾萨山选区地质资料较少,地面物探工作开展较难。利用高精度航磁资料,对该地区航磁数据进行了处理与解释,推断出断裂构造及岩体分布。结合区域成矿地质、构造环境和金属矿床时空分布特点,识别出成矿有利地区的航磁异常特征,划分了有利航磁异常分布带。在航磁有利异常分布图的基础上,结合矿床、矿点位置情况,进一步圈定出成矿远景区,为该地区成矿预测工作提供了依据。High- precision aeromagnetic survey is a relatively simple method to obtain a wealth of information,and is a powerful tool for carrying out large- scale metallogenic prediction. The study area is located in the middle part of the Isa Mountain,Queensland,Australia. Few geological data are available in this selected area by now,and it is difficult to carry on ground geophysical exploration due to the bad weather. In this work,we processed and interpreted the high- precision aeromagnetic data available to delineate the fault structures and rock distributions of this area. Combined with the regional metallogentic geology,tectonic setting and the spatial and temporal distribution of metal deposits and other metallogenic regularities,we summarized several aeromagnetic anomaly characteristics in favorable places of mineralization,and identified several regions that have favorable aeromagnetic anomalies.Furthermore,by a combination of the aeromagnetic anomalies and the distribution and occurrence of the ore deposits,we delineated several metallogentic prospect areas,which provided reliable evidence for the future metallogenic prognosis.

关 键 词：航磁资料 地质构造 成矿预测 艾萨山 

分 类 号：P631.2[天文地球—地质矿产勘探]