一种改进的激发极化测量方法和对比实验研究
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摘要
偶极-偶极测量装置是电法测量中最常见的方法.在本文所提及的斑岩铜矿的勘探项目中,偶极-偶极激电测量作为主要的地球物理勘查方法被广泛使用.但是由于研究区某些区域十分崎岖的地形和很差的进入条件,我们对偶极-偶极装置进行了一定的改进以适应环境的需要.改进后的方法称之为"双极-偶极".为了研究"双极-偶极"的有效性及其与偶极-偶极之间的差异,在同一测线,相同点位上,利用相同的设备,以相同的点距和仪器参数对两种方法进行了对比实验测量.并且简便起见,采用了与偶极-偶极相同的成图方法.随后,对测量数据和拟断面进行了详细的数据分析,最后对两种数据进行了二维反演.分析结果表明:(1)双极-偶极和偶极-偶极方法同样有效(2)双极-偶极和偶极-偶极在充电率结果上有一定差异,但差异很小(3)双极-偶极和偶极-偶极所测得的电阻率有较明显差异,但依然显示出总体的一致性.总而言之,对比试验证明,双极-偶极是非常有效的测量方法.在偶极-偶极难以实施的地方,可以作为偶极-偶极装置的有效补充和替代方法.
Dipole-Dipole is a commonly used method in electrical survey. It was used in the porphyry copper exploration project mentioned in this paper as a main geophysical method as well. In order to adapt very bad topography and access condition in some areas in the project,the Dipole-Dipole method has been revised in a way. The updated method is called‘Bipole-Dipole'. Afterwards,a contrast test was carried out on the same line, with a same configuration and instrument to figure out the differences between Dipole-Dipole and Bipole-Dipole. To keep it simple,the plotting method for Bipole-Dipole is the same as Dipole-Dipole. Then some particular analyses were performed on the measured data and the pseudo sections. At last,inversion models were generated from the pseudo sections. The analysis result shows( 1) Bipole-Dipole is as effective as Dipole-Dipole.( 2) There's only a little difference of chargeability between Bipole-Dipole and Dipole-Dipole.( 3) The resistivity between two of them is different obviously but also with a lot of similarities and shows a general consistency. In one word,Bipole-Dipole is proved to be an effective method and could be a useful supplement and replacement of Dipole-Dipole.
Dipole-Dipole is a commonly used method in electrical survey. It was used in the porphyry copper exploration project mentioned in this paper as a main geophysical method as well. In order to adapt very bad topography and access condition in some areas in the project,the Dipole-Dipole method has been revised in a way. The updated method is called‘Bipole-Dipole'. Afterwards,a contrast test was carried out on the same line, with a same configuration and instrument to figure out the differences between Dipole-Dipole and Bipole-Dipole. To keep it simple,the plotting method for Bipole-Dipole is the same as Dipole-Dipole. Then some particular analyses were performed on the measured data and the pseudo sections. At last,inversion models were generated from the pseudo sections. The analysis result shows( 1) Bipole-Dipole is as effective as Dipole-Dipole.( 2) There's only a little difference of chargeability between Bipole-Dipole and Dipole-Dipole.( 3) The resistivity between two of them is different obviously but also with a lot of similarities and shows a general consistency. In one word,Bipole-Dipole is proved to be an effective method and could be a useful supplement and replacement of Dipole-Dipole.
引文
Bai D M,Nie F J,Jiang S H.2010.Geophysical exploration methods for the oyu tolgoi Cu-Au deposit in mongolia[J].Acta Geoscientica Sinica(in Chinese),31(3):443-448.
Das U C,Singh R D.1982.Bipole-dipole field difference-a new resistivity sounding technique[J].Geophysical Prospecting,30(3):323-330.
Li J M.2004.The Induced Polarization Method Guide(in Chinese)[M].Beijing:Geological Publishing House.
Li J M.2005.Geoelectric Field and Electrical Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Liu Y Z,Cao J P.1987.Some characteristics of the“bipole-dipole”device in electrical prospecting[J].Geophysical and Geochemical Exploration(in Chinese),11(5):382-388.
Luo Z F,Wu X P.2011.Pole-dipole/dipole-pole array sounding twodimensional geoelectrical section imaging for time domain induced polarization method[J].Geophysical and Geochemical Exploration(in Chinese),35(2):218-222.
Oldenburg D W,Li Y G,Ellis R G.1997.Inversion of geophysical data over a copper gold porphyry deposit:A case history for Mt.Milligan[J].Geophysics,62(5):1419-1431.
Xu J S,Luo Z F.2010.The data from pole-dipole array sounding changed into the data of dipole-dipole array sounding and their twodimension inversion comparison for time domain induced polarization method[J].Computing Techniques for Geophysical and Geochemical Exploration(in Chinese),32(6):621-628.
Yang W S.2003.A preliminary study of the characteristics of the IPanomaly in the Tinggong copper deposit,Tibet,and the oreprospecting effect[J].Geophysical and Geochemical Exploration(in Chinese),27(3):180-183.
白大明,聂凤军,江思宏.2010.蒙古国欧玉陶勒盖铜(金)矿床物探找矿技术分析[J].地球学报,31(3):443-448.
李金铭.2004.激发极化法方法技术指南[M].北京:地质出版社.
李金铭.2005.地电场与电法勘探[M].北京:地质出版社.
刘煜洲,曹静平.1987.电法勘探中“双极-偶极”装置的某些特点[J].物探与化探,11(5):382-388.
雒志锋,吴小平.2011.时域激电单极-偶极、偶极-单极排列测深法二维地电断面成像[J].物探与化探,35(2):218-222.
徐锦山,雒志锋.2010.时域激电单极~偶极测深数据转换为偶极~偶极测深数据及其二维反演对比[J].物探化探计算技术,32(6):621-628.
杨伟寿.2003.西藏厅宫铜矿激电异常特征及找矿效果的初步研究[J].物探与化探,27(3):180-183.
(1)Zong Engineering and Research Organization.2002.GPD-32II Multifunction Receiver operational manual.
Das U C,Singh R D.1982.Bipole-dipole field difference-a new resistivity sounding technique[J].Geophysical Prospecting,30(3):323-330.
Li J M.2004.The Induced Polarization Method Guide(in Chinese)[M].Beijing:Geological Publishing House.
Li J M.2005.Geoelectric Field and Electrical Exploration(in Chinese)[M].Beijing:Geological Publishing House.
Liu Y Z,Cao J P.1987.Some characteristics of the“bipole-dipole”device in electrical prospecting[J].Geophysical and Geochemical Exploration(in Chinese),11(5):382-388.
Luo Z F,Wu X P.2011.Pole-dipole/dipole-pole array sounding twodimensional geoelectrical section imaging for time domain induced polarization method[J].Geophysical and Geochemical Exploration(in Chinese),35(2):218-222.
Oldenburg D W,Li Y G,Ellis R G.1997.Inversion of geophysical data over a copper gold porphyry deposit:A case history for Mt.Milligan[J].Geophysics,62(5):1419-1431.
Xu J S,Luo Z F.2010.The data from pole-dipole array sounding changed into the data of dipole-dipole array sounding and their twodimension inversion comparison for time domain induced polarization method[J].Computing Techniques for Geophysical and Geochemical Exploration(in Chinese),32(6):621-628.
Yang W S.2003.A preliminary study of the characteristics of the IPanomaly in the Tinggong copper deposit,Tibet,and the oreprospecting effect[J].Geophysical and Geochemical Exploration(in Chinese),27(3):180-183.
白大明,聂凤军,江思宏.2010.蒙古国欧玉陶勒盖铜(金)矿床物探找矿技术分析[J].地球学报,31(3):443-448.
李金铭.2004.激发极化法方法技术指南[M].北京:地质出版社.
李金铭.2005.地电场与电法勘探[M].北京:地质出版社.
刘煜洲,曹静平.1987.电法勘探中“双极-偶极”装置的某些特点[J].物探与化探,11(5):382-388.
雒志锋,吴小平.2011.时域激电单极-偶极、偶极-单极排列测深法二维地电断面成像[J].物探与化探,35(2):218-222.
徐锦山,雒志锋.2010.时域激电单极~偶极测深数据转换为偶极~偶极测深数据及其二维反演对比[J].物探化探计算技术,32(6):621-628.
杨伟寿.2003.西藏厅宫铜矿激电异常特征及找矿效果的初步研究[J].物探与化探,27(3):180-183.
(1)Zong Engineering and Research Organization.2002.GPD-32II Multifunction Receiver operational manual.