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报道了 1 97块岩石标本的相对介电常数的测量结果 ,揭示了相对介电常数随微波频率的变化规律 .讨论了相对介电常数与岩石类型、密度、结构和化学成分的关系 .获得下列结论 :(ⅰ )在 0 .5～ 1 8GHz频率段 ,相对介电常数与微波频率有关 ;(ⅱ )不同岩石类型之间的相对介电常数的实部变化较大 ,其变化趋势是 :从超基性岩、基性岩→中性岩→酸性岩→沉积岩 ,相对介电常数的实部逐渐降低 ,变化范围在 9～ 5之间 ;(ⅲ )相对介电常数实部与岩石的密度存在显著的正相关关系 ;(ⅳ )相对介电常数与岩石的结构有关 ,岩石的颗粒越细相对介电常数越大 ;(ⅴ )相对介电常数的实部与岩石化学成分的关系比较复杂 ,相对介电常数的虚部仅与MnO和烧失量呈显著相关关系 .
The relative permittivity measurements of 1 97 rock specimens were reported and the variation law of relative dielectric constant with microwave frequencies was reported.The relationship between relative permittivity and rock type, density, structure and chemical composition was discussed.The following Conclusions: (i) The relative dielectric constant is related to the microwave frequency at the frequency range from 0.5 to 18 GHz; (ii) the real part of the relative permittivity varies greatly between different rock types, and the trend is Ultramafic rocks, basic rocks → neutral rocks → acidic rocks → sedimentary rocks, and the real part of relative permittivity gradually decreases with a variation range of 9 to 5. (iii) The real part of relative dielectric constant and the density of rock (Ⅳ) The relative dielectric constant is related to the structure of the rock, and the finer the relative permittivity of the rock is, the more complex the relative permittivity is; (ⅴ) The relationship between the real part of the relative permittivity and the chemical composition of the rock is rather complicated The imaginary part of relative dielectric constant is only related to MnO and loss on ignition.