Electrification Phenomena in RocksIn many areas of geophysics, geology, geochemistry, and mining, there is considerable interest in laboratory data on the physical properties of various types of rocks. Until recently, how ever, only the mechanical properties of rocks had been studied in detail. The last few years have seen a relatively large amount of study of the electrical properties of rock samples and a need to organize the results of these studies has arisen. In"Electrical Properties of Rocks,"* E. 1. Parkhomenko reviewed and cataloged studies of electrical resistivity and the dielectric constant in rocks. In the present work she covers other electrical phenomena which are observed to occur in rocks and minerals and reviews the re sults of her own researches, as well as that of others, previously published. Theoretical and experimental data on the piezoelectric prop erties of minerals and rocks obtained since 1953 by E. 1. Parkho menko and myself as the result of laboratory investigations on quartz-bearing rocks (granite, gneiss, quartz veins, etc. ) comprise the bulk of the monograph (Chapters1-4). Itwas not previously con sidered that a polycrystalline mass such as a rock could exhibit piezoelectric properties - it was supposed characteristic only of single crystals. |
Contents
| 3 | |
Piezoelectric and Pyroelectric Effects | 35 |
Theoretical Basis for a Piezoelectric | 85 |
Methods of Studying Piezoelectric Effects in Rocks | 113 |
Piezoelectric Effect in Vein Quartz of Various | 138 |
References | 148 |
The Seismoelectric Effect in Rocks | 177 |
Induced Polarization in Rocks | 199 |
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Common terms and phrases
Akad amplitude angle applied arbitrary coordinate system AVIP cancrinite cgse units chalcopyrite charge class of symmetry coefficient constant crystals curve d₁₁ decay of induced decrease deformation dielectric permeability direction double layer E. I. Parkhomenko earthquake effect in rocks elastic waves elec electric effect electric field electrical axes electrical signals electrification electrodes electrolyte electroosmosis equation frequency geofiz geophysical granite greenockite increase indicates induced polarization ions longitudinal effect magnitude maximum measurements mechanical Nauk SSSR nepheline normal stress observed obtained optical axes oscillograph oscillograph record pegmatites phenomena piezo piezoelec piezoelectric effect piezoelectric minerals piezoelectric moduli piezoelectric properties piezoelectric tensor piezoelectric texture plane polarizability pore potential preferential orientation pyroelectric effect pyrolusite quartz grains quartz vein quartz-bearing rocks quartzite relationship rock sample seismic seismoelectric effect shown in Fig sphalerite studies surface temperature tion tourmaline transverse effect triboelectric effect tric values vector vein quartz water content wave speed zeta-potential