铁矿床深部矿体定位预测的一种新途径_以西藏恰功铁矿为例

45220093GEOLOGYANDEXPLORATIONVo.l45No.2March,2009[]2008-07-21;[]2008-10-17[][](1982),,2008,,,李志华1,贾文1,张玲玲1,刘兴平2,范云飞1,王超勇1(1.内蒙古自治区矿产实验研究所,呼和浩特010031;2.湖北省鄂东北地质大队,孝感432100)[]恰功铁矿是近几年新发现的矿山,矿体的形态大小位置产状边界等几何特征还没有清楚的认识,为了弄清这些问题,文章首先通过小波多尺度分析方法将恰功铁矿磁异常资料进行了位场信号分离,然后应用欧拉反褶积方法反演了异常与其场源深度的对应定量关系,最后把位场分离后的异常场源深度叠加起来,就可以对矿山深部找矿提供一种全新的思路[]深部矿体定位预测地面高精度磁法测量离散小波变换欧拉反褶积方法恰功铁矿[]P618.31;P631.2[]A[]0495-5331(2009)02-0090-08LiZhi-hua,JiaWen,ZhangLing-ling,eta.lAnewdefiningmethodofdeepconcealedorebodies,acasestudyattheQiagongirondepositinTibet[J].GeologyandExploration,2009,45(2):90-97.0引言,88!24∀20#,29!52∀15#,5150m,,2006,ENVI,1∃1,,1矿区地质特征-(K1t)-(K2E1d)-(E2n)[1](K1t),-(K2E1d),,,(E2n),,(N1)(E2),,(K1t)(E2n),(1)2方法技术原理,,,,,,,,,,Fourier,,,[2],,,,,,[3-10]901Fig.1ThegeologicalsketchmapofQiagongironmine1-;2-;3-;4;5;6;7;8;9;10;111NianboformationofPaleogeneEocene;2DianzhongformationofupperCretaceouslowerTertiaryPalaeocene;3TaknaformationoflowerCretaceous;4ThemediumcoarsegrainedporphyriticbiotiteadamelliteofMiocene;5ThefinegraineddioriteofEocene;6Skarnzone;7Orebody;8Fault;9Drillholesanditsnumbers;10Trenchesanditsnumbers;11Geologicboundary,,,3实例应用3.1矿区磁异常特征,,!T;!T[11,12](I)45.7!,(D)0.1!,,,,,(2-a),,(2-b),,10m,5!,,,HxDz,1∃1,%T%T,10,:(1),,300~912:400m,1300m;(2),,%T,,3.2磁异常小波多尺度分解结果,,9220093-d3DFig.3-d3Dgraphofdepthsforoneorderdetailsourcesofwaveletmulti-scaleanalysis,3-a~7-a~:1)3-a:%T,,%T,%T,%T,,,,2)(4-a),,;4-aFig.4-aThecontourmapofmagneticanomalyfortwoorderdetailofwaveletmulti-scaleanalysis3)(5-a),,;,932:942009(4)(6-a)(5)(7-a)3.3欧拉反褶积方法反演结果~(3~7),C-3C-4C-6,,0~100m;100~200m;100~300m;200~500m;300~600m,,,~952:7-d3DFig.7-d3Dgraphofdepthsforfiveorderdetailsourcesofwaveletmulti-scaleanalysis,C-4C-6,[13],0~600mC-3ZK71,,7.85~85.60m,85.60~138.64m,138.64~166.37m--,,,,166.37~177.09m,C-6ZK32,55.99~72.49m106.95~118.54m,[14,15]4结论,,,,,,;,,,,,[][1]西藏自治区地质矿产厅.1:20万谢通门幅区域地质调查报告[R].拉萨:西藏自治区地质矿产厅,1996.DepartmentofGeologyandMineralResourcesofTibetAutonomousRegion,Reportofregionalgeologicalsurveyonthescale1∃200000inXietongmenarea[R].Lhasa:DepartmentofGeologyandMineralResourcesofTibetAutonomousRegion,1996.[2]徐长发,李国宽.实用小波方法(第二版)[M].武汉:华中科技大学出版社,2004.XuChangfa,LiGuokuan,Practicalwaveletmethod(TheSecondEdition)[M].Wuhan:HuazhongUniversityofScienceandTechnologyPress,2004.[3]秦葆瑚.用欧拉方程估算埋深和形状因数[J].物探化探计算技术,1998,20:351-356.QinBaohu.EstimationofburieddepthandformcoefficientbyEulerFormula[J].ComputingTechniquesForGeophysicalandGeochemicalExploration,1998,20:351-356.[4]张季生.增强解析信号技术的应用条件[J].物探与化探,1999,23(4):296-300.ZhangJisheng.Theapplicationconditionsofthetechniquefortheenhancementofanalyticsignals[J].GeophysicalandGeochemicalExploration,1999,23(4):296-300.[5]张季生.用三维解析信号技术处理华南航磁异常[J].物探与化探,2000,24(3):190-196.ZhangJisheng.Theapplicationof3DanalyticalsignaltechniquetothetreatmentofaeromagneticanomaliesinsouthChina[J].GeophysicalandGeochemicalExploration,2000,24(3):190-196.[6]刘沈衡,吴燕冈,李永朴.利用欧拉算法反演磁性界面[J].石油物探,2000,39:101-106.LiuShenheng,WuYangang,LiYongpu.MagneticinterfaceinversionbyEuleralgorithm[J].GeophysicalProspectingForPetroleum,2000,39:101-106.[7]姚长利,管志宁,吴其斌,等.欧拉反演方法分析及实用技术改进[J].物探与化探,2004,28(2):150-155.YaoChangl,iGuanZhining,WuQibin,eta.lAnanalysisofEulerdeconvolutionanditsimprovement[J].GeophysicalandGeochemicalExploration,2004,28(2):150-155.[8]Thompson,D.T.Anewtechniqueformakingcomputerassisteddepthestimatesfrommagneticdata:Geophysics,1982,47:32-38.[9]Reid,A.B.,Allsop,J.M.,Granser,H.,eta.lMagneticinterpretationinthreedimensionusingEulerdeconvolution:Geophysics,1990,55:80-91.[10]DanielaGerovska,MarcosJ.AraizoBrao.AutomaticinterpretationofmagneticdatabasedonEulerdeconvolutionwithunprescribedstructuralindex,Computers&Geosciences,2003,29:949-960.[11]姚长利,黄卫宁,张聿文,等.直接阻尼法低纬度磁异常化极技术[J].石油地球物理勘探.2004,39(5):600-606.YaoChangl,iHuangWeining,ZhangYuwen,eta.lReductiontothepoleofmagneticanomaliesatlowlatitudewithdirectdamp962009ingmethod[J].OilGeophysicalProspecting,2004,39(5):600-606.[12]傅群和,李朗田,匡清国,等.鄂东地区金山店铁矿重磁异常特征及资源潜力预测[J].地质与勘探,2008,44(3):60-64.FuQunhe,LiLangtian,KuangQingguo,eta.lGravityandmagneticanomalycharacteristicsandresourcepotentialpredictioninthejinshandianoremine,easternhubeiprovince[J].GeologyandExploration,2008,44(3):60-64.[13]姚凤良,孙丰月.矿床学教程[M].北京:地质出版社,2006.YaoFengliang,SunFengyue.Oremineralogy[M].Beijing:GeologicalPress,2006.[14]刘国平,汪东波,祝新友,等.生产矿山深部及外围找矿潜力巨大夹皮沟金矿区勘查历史的启示[J].地质与勘探.2001,37(2):37-40.LiuGuoping,WangDongbo,ZhuXinyou,eta.lStudyonmineralexplorationatthedepthandadjacenttominingdistricts[J].GeologyandExploration,2001,37(2):37-40.[15]刘玉成,杨艺华,王永基.大冶铁矿控矿构造研究及深部隐伏矿体定位预测[J].地质与勘探,2006,42(6):10-16.LiuYucheng,YangYihua,WangYongj.iOrecontrollingstructuresandorientationprognosisofdeepconcealedoresintheDayeironmine[J].GeologyandExploration,2006,42(6):10-16.ANewDefiningMethodofDeepConcealedOreBodies,aCaseStudyattheQiagongIronDepositinTibetLIZhihua1,JIAWen1,ZHANGLingling1,LIUXingping2,FANYunfei1,WANGChaoyong1(1.InnerMongoliaMineralsExperimentResearchInstitute,Huhhot010031;2.TheGeologyBrigadeofNortheasternHubei,Xiaogan432100)Abstract:TheQiagongIrondepositisanewlydisc