| タイトル | Effect of iron content on the electrical conductivity of perovskite and magnesiowuestite assemblages at lower mantle conditions |
| 著者（英） | Jeanloz, Raymond; Li, Xiaoyuan |
| 著者所属（英） | California Univ. |
| 発行日 | 1991-04-10 |
| 言語 | eng |
| 内容記述 | The electrical conductivity of (Mg/0.76/Fe/0.24/)SiO3 perovskite and of an assemblage of (Mg/0.89/Fe/0.11/)SiO3 perovskite + (Mg/0.70/Fe/0.30/)O magnesiowiestite was measured at pressures of 45-80 GPa and temperatures from 295 to 3600 K. The apparent activation energy for electrical conduction is 0.24 (+ or - 0.10) eV for the perovskite and 0.20 (+ or - 0.08) eV for the perovskite + magnesiowuestite assemblage. Comparing present results with those derived previously for Fe-poor samples, it is found that the electrical conductivities of both the silicate perovskite and the perovskite + magnesiowuestite assemblage depend strongly on iron content. Thus, the electrical conductivity distribution inside the earth could provide an important constraint in modeling the composition of the lower mantle. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 91A33310 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/348832 |
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