音频大地电磁法对渝东南Ⅳ级地堑构造的识别及意义
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摘要
鉴于南华纪"大塘坡式"锰矿主要沉积于一系列北东向次级断陷(地堑)盆地中心,随着渝东南地区锰矿勘查深度加大,靶区选择的难度也随之增大,因此利用音频大地电磁法识别研究区内次级地堑构造十分必要。从野外实测物性数据出发,在对比研究区内断陷盆地与贵州省松桃地区物性结构相似性的基础上,设计了区内的正演地质模型,并通过模型反演计算,优选了区内二维反演模式;通过对实测AMT剖面电性结构分析,识别出了小茶园和楠木庄2个次级断陷(地堑)盆地,为区内下一步"大塘坡式"锰矿深部勘查方向提供了地球物理依据。
" Datangpo Type" manganese deposit in Nanhua period is mainly deposited in the center of a series of northeast oriented sub-rift basins.Further,the increase of the exploration depth of the manganese ore in southeast Chongqing makes it more difficult to select target areas.Therefore,it is essential to identify the secondary rift structures in the research area using Audiomagnetotelluric(AMT)method.Based on the field measured data,we designed the geological model of forward modeling on the basis of similarity between the rift basin in the study area and the Songtao area in Guizhou Province.We employed after optimization the two-dimensional inversion mode in the region by the model inversion calculation.Through analyzing the electrical property structure of the measured AMT profile,we identified two secondary rift basins,Xiaochayuan and Nanmuzhuang,which provide geophysical evidences for further investigation of " Datangpo Type" manganese deposit in the research region.
" Datangpo Type" manganese deposit in Nanhua period is mainly deposited in the center of a series of northeast oriented sub-rift basins.Further,the increase of the exploration depth of the manganese ore in southeast Chongqing makes it more difficult to select target areas.Therefore,it is essential to identify the secondary rift structures in the research area using Audiomagnetotelluric(AMT)method.Based on the field measured data,we designed the geological model of forward modeling on the basis of similarity between the rift basin in the study area and the Songtao area in Guizhou Province.We employed after optimization the two-dimensional inversion mode in the region by the model inversion calculation.Through analyzing the electrical property structure of the measured AMT profile,we identified two secondary rift basins,Xiaochayuan and Nanmuzhuang,which provide geophysical evidences for further investigation of " Datangpo Type" manganese deposit in the research region.
引文
[1]杜远生,周琦,余文超,等.Rodinia超大陆裂解、Sturtian冰期事件和扬子地块东南缘大规模锰成矿作用[J].地质科技情报,2015,34(6):1-7.
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[3]凌云,马志鑫,杨弘忠,等.重庆秀山南华纪大塘坡期沉积相分析与锰矿成矿[J].地质科技情报,2016,35(6):150-156.
[4]周琦,杜远生,覃英,等.古天然气渗漏沉积型锰矿床成矿系统与成矿模式:以黔湘渝毗邻区南华纪“大塘坡式”锰矿为例[J].矿床地质,2013,32(3):457-466.
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[10]吴子泉,刘元生,刘保金,等.地球物理方法在城市地震活动断层精确定位中的应用[J].地球物理学进展,2005,20(2):528-533.
[11]田占峰,毛星,罗旭,等.音频大地电磁测深法在电性结构研究中的应用:以郯庐断裂带宿迁段为例[J].物探与化探,2016,40(4):732-736.
[12]庞溯,卢涵宇,杜炳锐.音频大地电磁法在中甸断裂勘察中的应用[J].井冈山大学学报:自然科学版,2012,33(1):57-59.
[13]张松木.高密度电法在苏坂矿区寻找锰矿中的应用[J].中国西部科技,2008,7:33-34.
[14]解有波.高密度电法在龙岩适中矿区锰矿探测中的应用[J].企业技术开发,2009,28(4):29-30,42.
[15]王晓刚,陈根.物探方法在黑水县徐古锰矿普查中的应用[J].现代矿业,2010,22(10):81-85.
[16]赵雪娟,孙中任,李明阳.综合物探方法在锰矿勘查中的应用[J].地质与资源,2013,22(3):233-237.
[17]舒明.激发极化法在砚山阿空锰矿区的应用[J].云南地质,2004,23(3):385-389.
[18]余年,庞方.音频大地电磁测深法在地热资源勘探中的应用研究[J].水文地质与工程地质,2010,37(3):134-138.
[19]王冠龙,胡玉平,郭刚,等.音频大地电磁测深在云南马安山-金山矿区的应用[J].矿产勘查,2014,5(2):871-891.
[20]姚大为,朱威,王大勇,等.音频大地电磁测深在武山外围深部勘查中的应用[J].物探与化探,2015,39(1):100-103.
[21]王桥,杨剑,姚文.滇西北衙金多金属矿床CSAMT方法试验及找矿意义探讨[J].地质科技情报,2016,35(6):262-268.
[22]高远,董旭,申建平,等.大地电磁测深法在慈页1井定位中的应用[J].物探与化探,2017,41(4):689-693.
[23]杨炳南,周琦,杜远生,等.音频大地电磁法对深部隐伏构造的识别与应用:贵州省松桃县李家湾锰矿为例[J].地质科技情报,2015,34(6):26-32.
[24]刘志臣,吴发刚,骆红星,等.CSAMT法在贵州遵义锰矿整装勘查中的运用[J].物探与化探,2016,40(2):342-348.
[25]侯兵德,谢兴友,张太富,等.贵州西溪堡锰矿地质特征及深部找矿预测[J].矿产勘查,2013,4(1):43-51.
[26]谢晓峰,温光国,覃英,等.黔东地区“大塘坡式”锰矿地层厚度与锰矿关系浅谈:以贵州省松桃县李家湾锰矿为例[J].地质评论,2013,59(增刊):563-564.
[27]谢小峰,覃英,温官国,等.浅论贵州铜仁松桃锰矿区大塘坡组地层与锰矿成矿的关系[J].贵州地质,2014,31(1):32-37.
[28]谢小峰,杨坤光,袁良军.黔东地区“大塘坡式”锰矿研究现状及进展综述[J].贵州地质,2015,32(3):171-176.
[29]徐世浙,赵生凯.二维各向异性地电断面大地电磁场的有限元解法[J].地震学报,1985,7(1):80-90.
[30]霍光谱,胡祥云,刘敏.各向异性介质中大地电磁正演研究综述[J].地球物理学进展,2011,26(6):1976-1982.
[31]欧东新.计算机精度和网格大小对大地电磁有限单元法正演的影响[J].桂林工学院学报,2007,27(3):329-332.
[32]吴娟,席振珠,王鹤.网格尺寸及边界对大地电磁有限元正演精度的影响[J].物化探计算技术,2012,34(1):27-32.
[33]Fletcher R,Reeves C M.Function minimization by conjugate gradients[J].Computer J.,1964,7(2):149-154.
[34]Rodi W,Mackie R L.Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion[J].Geophysics,2001,66(1):174-187.
[35]Siripunvaraporn W,Egbert G.An efficient data-subspace inversion method for 2-D magnetotelluric data[J].Geophysics,2000,65(3):791-803.
[36]韩波,胡祥云,何展祥,等.大地电磁反演方法的数学分类[J].石油地球物理勘探,2012,47(1):177-187.
[37]Constable S C,Parker R L,Constable C G.Occam’s inversion;apractical algorithm for generating smooth models from electromagnetic sounding data[J].Geophysics,1987,52(3):289-300.
[38]de Groot-Hedlin C D,Constable S C.Occam’s inversion to generate smooth,two-dimensional models from magnetotelluric data[J].Geophysics,1990,55(12):1613-1624.
[39]周汝峰,王绪本,秦策,等.大地电磁NLCG与OCCAM二维反演的综合利用[J].地球物理学进展,2016,31(5):2306-2312.
[40]韩琦,胡祥云,程正璞,等.自适应非结构有限元MT二维起伏地形正反演研究[J].地球物理学报,2015,58(12):4675-4684.
[41]康敏,胡祥云,康健,等.大地电磁二维反演方法分析对比[J].地球物理学进展,2017,2(2):476-486.
[2]周琦,杜远生,袁良军,等.黔湘渝毗邻区南华纪武陵裂谷盆地结构及其对锰矿的控制作用[J].地球科学,2016,41(2):177-178.
[3]凌云,马志鑫,杨弘忠,等.重庆秀山南华纪大塘坡期沉积相分析与锰矿成矿[J].地质科技情报,2016,35(6):150-156.
[4]周琦,杜远生,覃英,等.古天然气渗漏沉积型锰矿床成矿系统与成矿模式:以黔湘渝毗邻区南华纪“大塘坡式”锰矿为例[J].矿床地质,2013,32(3):457-466.
[5]覃英,安正泽,王佳武,等.贵州松桃锰矿整装勘查区道坨隐伏超大型锰矿床的发现及地质特征[J].矿产勘查,2013,4(4):345-355.
[6]张遂,周琦,张平壹,等.黔东松桃西溪堡超大型锰矿床地质特征与找矿预测[J].地质科技情报,2015,34(6):59-67.
[7]周琦,杜远生,袁良军,等.贵州铜仁松桃锰矿国家整装勘查区地质找矿主要进展及潜力预测[J].贵州地质,2016,33(4):237-244.
[8] Garcia X,Jones A G.A new methodology for the acquisition and processing of audio-magnetotelluric(AMT)data in the AMT dead band[J].Geophysics,2005,70(5):119-126.
[9] Troiano A,Giuseppe M G D,Patella D,et al.Electromagnetic outline of the Solfatara-Pisciarelli hydrothermal system,Campi Flegrei(Southern Italy)[J].Journal of Volcanology&Geothermal Research,2014,277(3):9-21.
[10]吴子泉,刘元生,刘保金,等.地球物理方法在城市地震活动断层精确定位中的应用[J].地球物理学进展,2005,20(2):528-533.
[11]田占峰,毛星,罗旭,等.音频大地电磁测深法在电性结构研究中的应用:以郯庐断裂带宿迁段为例[J].物探与化探,2016,40(4):732-736.
[12]庞溯,卢涵宇,杜炳锐.音频大地电磁法在中甸断裂勘察中的应用[J].井冈山大学学报:自然科学版,2012,33(1):57-59.
[13]张松木.高密度电法在苏坂矿区寻找锰矿中的应用[J].中国西部科技,2008,7:33-34.
[14]解有波.高密度电法在龙岩适中矿区锰矿探测中的应用[J].企业技术开发,2009,28(4):29-30,42.
[15]王晓刚,陈根.物探方法在黑水县徐古锰矿普查中的应用[J].现代矿业,2010,22(10):81-85.
[16]赵雪娟,孙中任,李明阳.综合物探方法在锰矿勘查中的应用[J].地质与资源,2013,22(3):233-237.
[17]舒明.激发极化法在砚山阿空锰矿区的应用[J].云南地质,2004,23(3):385-389.
[18]余年,庞方.音频大地电磁测深法在地热资源勘探中的应用研究[J].水文地质与工程地质,2010,37(3):134-138.
[19]王冠龙,胡玉平,郭刚,等.音频大地电磁测深在云南马安山-金山矿区的应用[J].矿产勘查,2014,5(2):871-891.
[20]姚大为,朱威,王大勇,等.音频大地电磁测深在武山外围深部勘查中的应用[J].物探与化探,2015,39(1):100-103.
[21]王桥,杨剑,姚文.滇西北衙金多金属矿床CSAMT方法试验及找矿意义探讨[J].地质科技情报,2016,35(6):262-268.
[22]高远,董旭,申建平,等.大地电磁测深法在慈页1井定位中的应用[J].物探与化探,2017,41(4):689-693.
[23]杨炳南,周琦,杜远生,等.音频大地电磁法对深部隐伏构造的识别与应用:贵州省松桃县李家湾锰矿为例[J].地质科技情报,2015,34(6):26-32.
[24]刘志臣,吴发刚,骆红星,等.CSAMT法在贵州遵义锰矿整装勘查中的运用[J].物探与化探,2016,40(2):342-348.
[25]侯兵德,谢兴友,张太富,等.贵州西溪堡锰矿地质特征及深部找矿预测[J].矿产勘查,2013,4(1):43-51.
[26]谢晓峰,温光国,覃英,等.黔东地区“大塘坡式”锰矿地层厚度与锰矿关系浅谈:以贵州省松桃县李家湾锰矿为例[J].地质评论,2013,59(增刊):563-564.
[27]谢小峰,覃英,温官国,等.浅论贵州铜仁松桃锰矿区大塘坡组地层与锰矿成矿的关系[J].贵州地质,2014,31(1):32-37.
[28]谢小峰,杨坤光,袁良军.黔东地区“大塘坡式”锰矿研究现状及进展综述[J].贵州地质,2015,32(3):171-176.
[29]徐世浙,赵生凯.二维各向异性地电断面大地电磁场的有限元解法[J].地震学报,1985,7(1):80-90.
[30]霍光谱,胡祥云,刘敏.各向异性介质中大地电磁正演研究综述[J].地球物理学进展,2011,26(6):1976-1982.
[31]欧东新.计算机精度和网格大小对大地电磁有限单元法正演的影响[J].桂林工学院学报,2007,27(3):329-332.
[32]吴娟,席振珠,王鹤.网格尺寸及边界对大地电磁有限元正演精度的影响[J].物化探计算技术,2012,34(1):27-32.
[33]Fletcher R,Reeves C M.Function minimization by conjugate gradients[J].Computer J.,1964,7(2):149-154.
[34]Rodi W,Mackie R L.Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion[J].Geophysics,2001,66(1):174-187.
[35]Siripunvaraporn W,Egbert G.An efficient data-subspace inversion method for 2-D magnetotelluric data[J].Geophysics,2000,65(3):791-803.
[36]韩波,胡祥云,何展祥,等.大地电磁反演方法的数学分类[J].石油地球物理勘探,2012,47(1):177-187.
[37]Constable S C,Parker R L,Constable C G.Occam’s inversion;apractical algorithm for generating smooth models from electromagnetic sounding data[J].Geophysics,1987,52(3):289-300.
[38]de Groot-Hedlin C D,Constable S C.Occam’s inversion to generate smooth,two-dimensional models from magnetotelluric data[J].Geophysics,1990,55(12):1613-1624.
[39]周汝峰,王绪本,秦策,等.大地电磁NLCG与OCCAM二维反演的综合利用[J].地球物理学进展,2016,31(5):2306-2312.
[40]韩琦,胡祥云,程正璞,等.自适应非结构有限元MT二维起伏地形正反演研究[J].地球物理学报,2015,58(12):4675-4684.
[41]康敏,胡祥云,康健,等.大地电磁二维反演方法分析对比[J].地球物理学进展,2017,2(2):476-486.