THERMAL-DIFFUSIVITY OF MGSIO3 PEROVSKITE

被引：70

作者：

OSAKO, M ^{[1
]}

ITO, E ^{[1
]}

机构：

[1] OKAYAMA UNIV,INST STUDY EARTHS,MISASA,TOTTORI 68202,JAPAN

来源：

GEOPHYSICAL RESEARCH LETTERS | 1991年 / 18卷 / 02期

关键词：

D O I：

10.1029/91GL00212

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Thermal diffusivity of MgSiO3 perovskite has been measured in the temperature range of 160 K to 340 K using a sample synthesized in a uniaxial split-sphere high-pressure apparatus. At 300 K the thermal diffusivity of perovskite is 1.72 x 10(-6) m2s-1, from which the thermal conductivity is evaluated to be 5.1 Wm-1K-1. Our model calculation shows that lattice thermal conductivity of the perovskite increases by a factor of 4 with depth throughout the lower mantle and reaches to 12 Wm-1K-1 in the vicinity of the mantle-core boundary. The D" layer might not be a thermal boundary layer insulating the high core-temperature, if this layer mainly consists of the perovskite.

引用

页码：239 / 242

页数：4

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