Maxwell板状体反演在航空瞬变电磁法找矿实践中应用及效果
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摘要
航空瞬变电磁法在寻找隐伏和埋深较大的多金属矿产方面具有明显优势。VTEM航空瞬变电磁观测系统2013年引进到国内,先后在多个省区开展了多金属矿产勘查工作,均取得了明显的地质找矿效果。在航空瞬变电磁法找矿实践中,也逐步形成了一套完整的数据处理和资料解释理论及方法。Maxwell板状体反演是航空瞬变电磁数据解释的一种重要技术方法,把复杂地质结构简化为板状体模型来进行研究,获得地下地质地球物理体(或矿体)在三维空间上的分布特征,有效地确定钻探钻孔的位置和参数,直接用于找矿工程实践。文章重点介绍航空瞬变电磁Maxwell板状体反演的目标异常的选择、模型参数定义、典型板状体的正演响应、反演数据准备和正演拟合及反演,并以黑龙江和青海2个已知矿区为例说明Maxwell板状体反演在航空瞬变电磁找矿实践中的应用及效果。
Airbone TEM has an obvious advantage in exploration of blinded and deep-buried polymetallic minerals. The most advanced VTEM system,introduced into China in 2013,was used for polymetallic minerals exploration in some provinces and autonomous regions. A complete set of data processing and interpretation theory and methods has been gradually taken shape. Maxwell plate modeling is an important technique for data interpretation of airborne TEM which simplifies the complicate geological structure to a plate model to underground geology and geophysical target( or bore) distribution in 3 D space. It can effectively help to determine the location and parameters of drilling boreholes and directly used for prospecting practice. The paper focused on selection of target anomaly for Maxwell plate modeling,definition of model parameters,forward response of typical plate models,data preparation,forwarding and inversion,in addition,introduced the applications effect of Maxwell plate modeling in Heilongjiang and Qinghai.
Airbone TEM has an obvious advantage in exploration of blinded and deep-buried polymetallic minerals. The most advanced VTEM system,introduced into China in 2013,was used for polymetallic minerals exploration in some provinces and autonomous regions. A complete set of data processing and interpretation theory and methods has been gradually taken shape. Maxwell plate modeling is an important technique for data interpretation of airborne TEM which simplifies the complicate geological structure to a plate model to underground geology and geophysical target( or bore) distribution in 3 D space. It can effectively help to determine the location and parameters of drilling boreholes and directly used for prospecting practice. The paper focused on selection of target anomaly for Maxwell plate modeling,definition of model parameters,forward response of typical plate models,data preparation,forwarding and inversion,in addition,introduced the applications effect of Maxwell plate modeling in Heilongjiang and Qinghai.
引文
Airborne geophysical Surveys,inner data[R].Geotech Ltd,2014.
Alexander Prikhodko,Ph D,P.2010.Geo EM TIME CONSTANT(TAU)ANALYSIS Geotech Ltd[R].
Alexander Prikhodko,Ph D,P.2011.Geo TEM RESISTIVITY DEPTH IMAGING(RDI)Geotech Ltd[R].
Annan,P.2013.Airborne EM-Lessons learnt and future opportunities[C]//13th SAGA Biennial Conference and Exhibition,and 6TH International AEM Conference and Exhibition,Conference proceedings,36-37.
Maxwell A.Meju,1998.Short Note:A simple method of transient electromagnetic data analysis[J].Geophysics,63,405-410
Vallée,M.A.,Smith,et al.2011.Metalliferous mining geophysicsState of the art after a decade in the new millennium[J].Geophysics,76:W31-W50.
Yan Luo,Lin Zhu,Zhao Zhao,et al.2015.Application prospects of VTEM helicopter time-domain electromagnetics in China.International Workshop on Gravity,Electrical&Magnetic Methods and their Applications,Chengdu,China,285-288.
江民忠,李怀渊,骆燕,等.2016.黑龙江省大兴安岭成矿带航电方法试验成果报告[R].石家庄.核工业航测遥感中心.
雷延军,韩德义,辛军强,等.2014.青海东昆中岩浆弧带侵入岩体中金矿床地质特征及成因探讨[J].青海大学学报(自然科学版),32(6):57-62.
李厚民,沈远超,胡正国,等.2001.青海东昆仑五龙沟金矿床成矿条件及成矿机理[J].地质与勘探,37(1):65-69.
李怀渊,张景训,江民忠,等.2015.航空时间域电磁法测量系统VTEM应用效果分析[J].地质论评,61(增刊),04.
梁盛军,张力卡,曹学峰,等.2014.时间域航空电磁法研究进展综述[J].地质与勘探,50(4):0735-0740.
刘振锋,张泽阳,沈廷硕,等.2014.青海省都兰县哈西哇矿区Ⅰ矿带详查及外围普查2013年总结及2014年设计[R].西宁:青海省有色地质矿产勘查局八队.
骆燕,曾阳,石岩,等.2014.航空瞬变电磁法在火山岩型块状硫化物矿区的试验[J].物探与化探,38(4):840-845.
骆燕,江民忠,宁媛丽,等.2016.不同类型低阻异常航电时间常数的特征分析[J].物探与化探,40(5):991-997.
吕长生,杨昆林,褚向飞,等.2010.黑龙江省大兴安岭呼中区下嘎来奥伊河上游铅锌多金属矿Ⅰ号、Ⅳ号矿带详查报告[R].哈尔滨:黑龙江省地球物理勘察院.
牛之琏,2000.时间域电磁法原理[M].长沙:中南工业大学出版社.
苏艳平,薛国强,周楠楠,等.2012.板状体瞬变电磁正演计算系统[J].物探与化探,36(S).133-136
孙栋华,王培建,李怀渊,等.2015.青海省石头坑德-五龙沟地区1∶1 万航空电磁法测量成果报告[R].石家庄.核工业航测遥感中心.
王兴春,武军杰,邓晓红,等.2012.三套国外TEM软件正反演结果对比[J].物探与化探,36(3)507-510.
杨昆林,褚向飞,岳竞峰,等.2015.黑龙江省大兴安岭呼中区下嘎来奥伊河上游铅锌多金属矿Ⅰ号、Ⅱ号、Ⅳ号矿带勘探报告[R].哈尔滨:黑龙江省地球物理勘察院.
殷长春,张博,刘云鹤,等.2015.航空电磁勘查技术发展现状及展望[J].地球物理学报,58(8):2637-2653.
周俊杰.2011.航空瞬变电磁法2.5维正演模拟研究[D].长沙:中南大学.
周桃生,刘百祥.2015.基于大定源回线的薄板导体响应正演模拟研究[J].山东煤炭科技,2015(1),124-126.
Alexander Prikhodko,Ph D,P.2010.Geo EM TIME CONSTANT(TAU)ANALYSIS Geotech Ltd[R].
Alexander Prikhodko,Ph D,P.2011.Geo TEM RESISTIVITY DEPTH IMAGING(RDI)Geotech Ltd[R].
Annan,P.2013.Airborne EM-Lessons learnt and future opportunities[C]//13th SAGA Biennial Conference and Exhibition,and 6TH International AEM Conference and Exhibition,Conference proceedings,36-37.
Maxwell A.Meju,1998.Short Note:A simple method of transient electromagnetic data analysis[J].Geophysics,63,405-410
Vallée,M.A.,Smith,et al.2011.Metalliferous mining geophysicsState of the art after a decade in the new millennium[J].Geophysics,76:W31-W50.
Yan Luo,Lin Zhu,Zhao Zhao,et al.2015.Application prospects of VTEM helicopter time-domain electromagnetics in China.International Workshop on Gravity,Electrical&Magnetic Methods and their Applications,Chengdu,China,285-288.
江民忠,李怀渊,骆燕,等.2016.黑龙江省大兴安岭成矿带航电方法试验成果报告[R].石家庄.核工业航测遥感中心.
雷延军,韩德义,辛军强,等.2014.青海东昆中岩浆弧带侵入岩体中金矿床地质特征及成因探讨[J].青海大学学报(自然科学版),32(6):57-62.
李厚民,沈远超,胡正国,等.2001.青海东昆仑五龙沟金矿床成矿条件及成矿机理[J].地质与勘探,37(1):65-69.
李怀渊,张景训,江民忠,等.2015.航空时间域电磁法测量系统VTEM应用效果分析[J].地质论评,61(增刊),04.
梁盛军,张力卡,曹学峰,等.2014.时间域航空电磁法研究进展综述[J].地质与勘探,50(4):0735-0740.
刘振锋,张泽阳,沈廷硕,等.2014.青海省都兰县哈西哇矿区Ⅰ矿带详查及外围普查2013年总结及2014年设计[R].西宁:青海省有色地质矿产勘查局八队.
骆燕,曾阳,石岩,等.2014.航空瞬变电磁法在火山岩型块状硫化物矿区的试验[J].物探与化探,38(4):840-845.
骆燕,江民忠,宁媛丽,等.2016.不同类型低阻异常航电时间常数的特征分析[J].物探与化探,40(5):991-997.
吕长生,杨昆林,褚向飞,等.2010.黑龙江省大兴安岭呼中区下嘎来奥伊河上游铅锌多金属矿Ⅰ号、Ⅳ号矿带详查报告[R].哈尔滨:黑龙江省地球物理勘察院.
牛之琏,2000.时间域电磁法原理[M].长沙:中南工业大学出版社.
苏艳平,薛国强,周楠楠,等.2012.板状体瞬变电磁正演计算系统[J].物探与化探,36(S).133-136
孙栋华,王培建,李怀渊,等.2015.青海省石头坑德-五龙沟地区1∶1 万航空电磁法测量成果报告[R].石家庄.核工业航测遥感中心.
王兴春,武军杰,邓晓红,等.2012.三套国外TEM软件正反演结果对比[J].物探与化探,36(3)507-510.
杨昆林,褚向飞,岳竞峰,等.2015.黑龙江省大兴安岭呼中区下嘎来奥伊河上游铅锌多金属矿Ⅰ号、Ⅱ号、Ⅳ号矿带勘探报告[R].哈尔滨:黑龙江省地球物理勘察院.
殷长春,张博,刘云鹤,等.2015.航空电磁勘查技术发展现状及展望[J].地球物理学报,58(8):2637-2653.
周俊杰.2011.航空瞬变电磁法2.5维正演模拟研究[D].长沙:中南大学.
周桃生,刘百祥.2015.基于大定源回线的薄板导体响应正演模拟研究[J].山东煤炭科技,2015(1),124-126.