The phase angles display a strong dependence on frequency ; the impedance magnitudes decrease across the entire frequency spectrum . the activation enthalpies lie in the range of 1 . 03 - 2 . 11ev 在压力为l一3gpa 、温度为1282一z544k 、频率为0 . 1一lo6hz 、氧逸度为mo一mooz的条件下,对纯橄榄岩的电导率进行了测量。