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在1.0～4.0 GPa和643～1093 K下利用阻抗谱法测定了西藏纯橄岩的电导率, 实验结果表明, 该纯橄岩的活化焓均小于0.9 eV,可能为颗粒内部和颗粒边界同时参与的混合导电机制. 以实验结果为依据, 通过对西藏西部已有大地电磁测深资料(电导率-深度剖面)的反演得出: 青藏高原的改则至鲁谷一带存在冷地幔. 该结果从高温高压实验的角度为目前的冷地幔观点提供了有力的实验证据.
The conductivity of dunite in Tibet was measured by impedance spectroscopy at 1.0 ~ 4.0 GPa and 643 ~ 1093 K. The experimental results show that the activation enthalpy of the dunite is less than 0.9 eV, which may be due to the simultaneous involvement of the particle interior and the grain boundary Based on the experimental results, the inversion of the existing geomagnetic sounding data (conductivity-depth profile) in western Tibet shows that there is a cold mantle in the margin of the Qinghai-Tibet Plateau to the Lugu area. From the perspective of high temperature and high pressure experiments provide strong experimental evidence for the current cold mantle point of view.