On the increase in thermal diffusivity caused by the perovskite to post-perovskite phase transition and its implications for mantle dynamics
On the increase in thermal diffusivity caused by the perovskite to post-perovskite phase transition and its implications for mantle dynamics
复制标题
钙钛矿到后钙钛矿相变引起的热扩散率的增加及其对地幔动力学的影响
DOI:
10.1016/j.epsl.2011.12.009
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发表时间:
2012
影响因子:
5.3
通讯作者:
Hunt S
中科院分区:
文献类型:
--
作者:
Hunt S
The thermal diffusivity (κ) of perovskite and post-perovskite CaIrO3has been measured, at elevated pressure and temperatures up to 600°C, using the X-radiographic Ångström method. At high temperatures we find that the thermal diffusivity of post-perovskite is slightly below twice that of isochemical perovskite over the temperature range investigated. Assuming a similar effect occurs in MgSiO3post-perovskite, the effect of the contrasting thermal transport properties between perovskite and post-perovskite on mantle dynamics has been investigated using simple two-dimensional convection models. These show a reduction in extent and increase in depth of post-perovskite lenses, as well as increased core–mantle-boundary heat-flux, broader upwellings and more vigorous downwellings when compared to the reference, constant a, case.
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影响因子:
3.2
作者:
A. Hofmeister
通讯作者:
A. Hofmeister
影响因子:
1.1
作者:
N. Keawprak;R. Tu;T. Goto
通讯作者:
T. Goto
影响因子:
5.3
作者:
Labrosse, S;Poirier, JP;Le Mouël, JL
通讯作者:
Le Mouël, JL
影响因子:
2.7
作者:
S. Hunt;S. Hunt;A. Walker;R. McCormack;D. Dobson;A. Wills;Li Li-Li
通讯作者:
S. Hunt;S. Hunt;A. Walker;R. McCormack;D. Dobson;A. Wills;Li Li-Li
影响因子:
3.1
作者:
Martin, C. David;Chapman, Karena W.;Parise, John B.
通讯作者:
Parise, John B.