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.
出处
《地球物理学进展》
CSCD
北大核心
2017年第1期299-305,共7页
Progress in Geophysics
