几种低空高精度航空磁测系统及找矿应用分析
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摘要
航空磁法测量在地质矿产勘查领域有着广泛深入的应用,特别是寻找在与磁性矿物有关的金属矿床勘查中发挥着重要的作用。但是大飞机的航磁和地面人工磁测资料已难以满足矿产勘查工作的需求,为此,近几年国内迅速发展一种新型的磁法测量手段—低空高分辨磁法测量系统。这种系统以动力滑翔机、无人飞艇或无人飞机为飞行平台,集成了当前先进的磁测仪器及相关的软件技术,并多个地区开展了1∶1万高分辨率的低空磁法测量工作,取得了较好的方法运用效果,经对比分析,这种低空磁测资料可以替代传统地面磁法测量,快速而有效地开展高精度大面积的磁法测量,为矿产勘查提供一种先进的技术手段。
Aeromagnetic survey has been widely used and deeply involved in the mineral exploration activities.Especially,it plays a very important role in exploring magnetite-related ore deposits.But large aircraft aeromagnetic survey and ground artificial magnetic survey results cannot meet the need of mineral exploration.Therefore,a new aeromagnetic system applied at very low altitude with high resolution has been developed recently.The new system uses power glider,unmanned airship or pilotless aircraft as the flight platform.It integrates advanced magnetic survey machinery and related software technology.Besides,it has implemented high resolution(scale 1∶10000)at very low altitude in many areas.The new system has reached good survey results.By comparison,this new aeromagnetic system can replace the traditional ground magnetic survey in large exploration areas with high resolution and efficiency.It provides an advanced technical approach for mineral exploration.
Aeromagnetic survey has been widely used and deeply involved in the mineral exploration activities.Especially,it plays a very important role in exploring magnetite-related ore deposits.But large aircraft aeromagnetic survey and ground artificial magnetic survey results cannot meet the need of mineral exploration.Therefore,a new aeromagnetic system applied at very low altitude with high resolution has been developed recently.The new system uses power glider,unmanned airship or pilotless aircraft as the flight platform.It integrates advanced magnetic survey machinery and related software technology.Besides,it has implemented high resolution(scale 1∶10000)at very low altitude in many areas.The new system has reached good survey results.By comparison,this new aeromagnetic system can replace the traditional ground magnetic survey in large exploration areas with high resolution and efficiency.It provides an advanced technical approach for mineral exploration.
引文
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[2]毛景文,余金杰,袁顺达,等.铁氧化物-铜-金(IOCG)型矿床:基本特征、研究现状与找矿勘查[J].矿床地质,2008,27(3):267-278.
[3]Williams,P.J.,Barton,M.D.,Johnson,D.A.,et al.Iron oxide copper-gold deposits:Geology,space-time distribution,and possible modes of origin[J].Economic Geology,100th Anniversary Volume,2005:371-405.
[4]Douglas,H.The Olympic Dam ore deposit discovery-apersonal view[J].Society of Economist Geology Newsletter,2006,66:1,8-15.
[5]Behn,G.,Camus,F.,Carrasco,P.,et al.Aeromagnetic signature of porphyry copper systems in northern Chile and its geologic implications[J].Economic Geology,2001,96:239–248.
[6]娄德波,宋国玺,李楠,等.磁法在我国矿产预测中的应用[J].地球物理学进展,2008,23(1):249-256.
[7]Thomson,S.,Fountain,D.,Watts,T.Airborne GeophysicsEvolution and Revolution[C].In"Proceedings of Exploration07:Fifth Decennial International Conference on Mineral Exploration"edited by B.Milkereit,2007:19-37.
[8]Gamey,T.J.,Doll,W.E.,Beard,L.P.,et al.Analysis of Correlated Noise in Airborne Magnetic Gradients for Unexploded Ordnance Detection[J].JEEG,2004,9(3):1-11.
[9]Doyle,B.The Universal Wing Un-manned Airborne Vehicle for Magnetic Surveys[C],KEGS Airborne Symposium,Toronto,2005.
[10]王庆乙,行英弟,蒋彬,等.MAMSS-1超低空高精度航磁系统的研制[J].物探与化探,2010,34(6):712-716.