The Study On Complex Resistivity Testing And The Complex Impedance Model Of Rock

Laboratory rock experimental study of complex resistivity is an important foundation for the geophysical exploration,on the bsis of accuracy to obtain the parameters of rocks and minerals complex resistivity methods and Techniques,set up the ideal complex resistivity model, analysis the internal reasons of difference of rocks and minerals complex resistivity, it is very important that reasonable explain complex resistivity method field data.Based on the review of the frequency domain rock electrical parameters on the experimental research from home and abroad, the author has collected a total of 369 piece of rock and mineral specimens. In the Lab, measured the specimens’ impedance amplitude, phase, imaginary and real components of the actual spectral between the frequency of 0.05Hz~100kHz. On the other hand, observed the specimens with scanning electron microscope to 16 vice-like specimens and carried out on samples containing mineral identification and.The quality of the rocks and minerals complex resistivity test data is the basis 0f later period work. This article from the experiment material, test key has carried on the experimental analysis,summarizes a set of relatively complete rocks and minerals complex resistivity test method.The phenomenons that the Fitting effect bad,The frequency correlation index cannot Identify source rocks and minerals IP anomaly,May appear more fitting results of Cole-Cole model,Comparative analysis the fitting effect of several common model,Found Dias model’Fitting effect is best with the test data.Using mathematical methods,The Dias model change into a superposition model of Warburg and Debye,call it the modified Dias model.It can be seen from spectrum parameters and inverse fitting results of the modified Dias model that modified Dias model secondary parameters are clearly defined,the fitting results is only one,The fitting effect is ideal,Parameters can be divided into frequency bands for expressing resistivity characteristics of rocks and minerals. In order to study the modified Dias model secondary parameters are embodied rocks and minerals characteristics and geological significance,Using this model to fit the observed data of the rock mass of Guangdong area of Eastern rocks and minerals specimen complex resistivity,and Conducting field lithology description and quadrature mirror or single polarizer rock ore identification,to analysis rocks and minerals mineral content, composition and structure.Statistical analysis The relationship of the secondary parameters of The model and rocks and minerals characteristic.Found the response of Warburg model parameters that express low Frequency information are bigger than Debye model parameters that express high Frequency information. The zero frequency resistivity and chargeability can distinguish different lithology,Time constant can assist embodied in the analysis of the rock ore intrinsic factor differences,And the time constant can distinguish between different rocks and minerals structure.The zero frequency resistivity and chargeability can distinguish different lithology,time constant can assist embodied in the analysis of the rock ore intrinsic factor differences,and the time constant can distinguish between different rocks and minerals structure.These results proved that the modified Dias model can better distinguish the rock mass of Guangdong area of Eastern rocks and minerals complex resistivity characteristics,for the field of complex resistivity method provides the basic data.