Test and analysis of host rock anisotropic electrical parameters in typical ore concentration areas of Anhui Province
LU Da-Jin1, XUE Guo-Qiang2, DU Dong-Xu1, MA Zhen-Jun2
1. Geological Exploration Technologies Institute of Anhui Province, Hefei 230031, China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences,Beijing 100029, China
Abstract：In order to investigate the geophysical parameters of the important ore concentration areas in Anhui Province, the authors studied the anisotropy of rock electric parameters. Selecting sedimentary and metamorphic rocks in Huoqiu ore concentration area, Lujiang-Zongyang ore concentration area, Ningwu ore concentration area and Dongzhi-Jingxian metallogenic belt as study samples, the authors tested the three directions of the resistivity and polarization. The result confirms that the anisotropy of rock resistivity is extremely obvious. It is found that the higher the resistivity, the higher the ratio of the vertical resistivity to the horizontal resistivity. The anisotropy of rock polarization also exists, but it is not obvious. The anisotropy of resistivity exists in sedimentary rock, metamorphic rock and volcanic sedimentary rock. Based on data analysis of rock anisotropic electrical parameters, the authors summarized the anisotropy characteristics of rock electrical parameters, which provides basic data and foundation for the study of geology, the comprehensive understanding of the previous data and the comprehensive interpretation of electrical prospecting.
陆大进, 薛国强, 杜东旭, 马振军. 安微省典型矿集区岩石各向异性电性参数测试分析[J]. 物探与化探, 2017, 41(2): 333-340.
LU Da-Jin, XUE Guo-Qiang, DU Dong-Xu, MA Zhen-Jun. Test and analysis of host rock anisotropic electrical parameters in typical ore concentration areas of Anhui Province. Geophysical and Geochemical Exploration, 2017, 41(2): 333-340.
[1] 朱涛,周建国,郝锦绮.电阻率各向异性及在地震研究中的应用[J].地球物理学进展, 2009,24(3):871-878. [2] Brace W F, Orange A S.Electrical resistivity changes in saturated rocks during fracture and frictional sliding[J].Journal of Geophysical Research,1968,73(4):1433-1444. [3] Kurite K. How can we identify location of a fraction plane?—Anisotropy of electrical conductivity and seismic velocity in dilatancy[J]. Earthq. Predict Res,1986,4(12):39-45. [4] 陈峰,安金珍,廖椿庭. 原始电阻率各向异性岩石电阻率变化的方向性[J].地球物理学报,2003,46(2):271-280. [5] 俞然刚,田勇.砂岩岩石力学参数各向异性研究[J].实验力学,2013,28(3):368-375. [6] 徐宏武.煤层电性参数测试及其与煤岩特性关系的研究[J].煤炭科学技术,2005,33(3):42-46,41. [7] 张斌,周建国.岩石电阻率的实验研究[J].CT理论与应用研究,2015,24(2):239-249. [8] 席道瑛,陈林.岩石各向异性参数研究[J].物探化探计算技术,1994,16(1):16-21. [9] Verner T,Pek J.Numerical modeling of direct currents in 2-D anisotropic structures[M].Elektromagnetische Tiefenforschung, Deutsche Geophysikalische Gesellschaft,1988,43:550-562. [10] Bibby H M.Direct current resistivity modeling for axially symmetric bodies using the finite element method[J].Geophysics,1978,43(3):550-562. [11] 李玉发,姜立富.安徽省岩石地层[M].武汉:中国地质大学出版社,1997. [12] 安徽省地质矿产局.安徽省区域地质志[M].北京:地质出版社,1987.
