OXYGEN DIFFUSION IN PEROVSKITE - IMPLICATIONS FOR ELECTRICAL-CONDUCTIVITY IN THE LOWER MANTLE

被引：38

作者：

GAUTASON, B

MUEHLENBACHS, K

机构：

[1] Department of Geology, University of Alberta

来源：

SCIENCE | 1993年 / 260卷 / 5107期

关键词：

D O I：

10.1126/science.260.5107.518

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Experimental determination of oxygen self-diffusion in CaTiO3 perovskite, a structural analog of (Mg,Fe)SiO3 perovskite, confirms a theoretical relation between diffusion constants and anion porosity. Oxygen diffusion rates in (Mg,Fe)SiO3 perovskite calculated with this relation increase by about eight orders of magnitude through the lower mantle. Electrical conductivity values calculated from these diffusion rates are consistent with inferred conductivity values for the lower mantle. This result suggests that the dominant conductivity mechanism in the deep mantle is ionic.

引用

页码：518 / 521

页数：4

共 50 条

[11] THE LATE 1960S SECULAR VARIATION IMPULSE, THE 11 YEAR MAGNETIC VARIATION AND THE ELECTRICAL-CONDUCTIVITY OF THE DEEP MANTLE [J].