| 超高压下氧化物电导率测量及下地幔电导率的讨论 |
| |
| 引用本文： | 刘顺,熊大和.超高压下氧化物电导率测量及下地幔电导率的讨论[J].地球物理学进展,1993(2). |
| |
| 作者姓名： | 刘顺 熊大和 |
| |
| 作者单位： | 中国科学院地质研究所，中国科学院地质研究所 北京 100029，北京 100029 |
| |
| 摘 要： | 在金刚石对顶砧压机上,对一些氧化物进行了0—30 GPa 压力范围下的电导率测量,发现所测氧化物可按其电导性质为两类:过渡族元素氧化物和非过渡族元素氧化物前者平均电导率较高且有正压效应,后者平均电导率较低且压力效应不明显.过渡族元素氧化物的高导性质对讨论下地幔的电导事和化学模式具有重要意义.结合前人的研究成果,半定量地估计了700 km 处下地幔的电导率.
|
| 关 键 词： | 超高压 电导率 下地幔 实验研究 |
MEASUREMENTS OF ELECTRICAL CONDUCTIVITIES OF SOME OXIDES AT ULTRAHIGH PRESSURE AND THEIR IMPLICATIONS FOR LOWER MANTLE CONDUCTIVITY |
| |
| Liu Shun Xiong Dahe.MEASUREMENTS OF ELECTRICAL CONDUCTIVITIES OF SOME OXIDES AT ULTRAHIGH PRESSURE AND THEIR IMPLICATIONS FOR LOWER MANTLE CONDUCTIVITY[J].Progress in Geophysics,1993(2). |
| |
| Authors: | Liu Shun Xiong Dahe |
| |
| Abstract: | Using DAC we measured the electrical conductivities of some oxides at pressure up to 30 GPa andambient temperature.The oxides can be divided into two kinds according to their electrical conductivitycharacteristics.The first kind,the transition element oxides,has generally high conductivities and positivepressure effects.While the second,nontransition element oxides,has generally low conductivities and weakpressure effects.The high conductivity of transition element oxides are meaningful for explaining the elec-trical conductivity of lower mantle.Combining with previous results,we semiquantitatively discuassed theelectrical conductivity at 700 km deep mantle. |
| |
| Keywords: | Ultrahigh pressure Electrical conductivity Lower mantle Experimental resaerch |
| 本文献已被 CNKI 等数据库收录！ |
