VOLATILE TRANSPORT INSIDE SUPER-EARTHS BY ENTRAPMENT IN THE WATER-ICE MATRIX
VOLATILE TRANSPORT INSIDE SUPER-EARTHS BY ENTRAPMENT IN THE WATER-ICE MATRIX
复制标题
超级地球内部水冰基质中的挥发性输运
DOI：
10.1088/0004-637x/769/1/29
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Podolak
中科院分区：
文献类型：
--
作者：
A. Levi;D. Sasselov;M. Podolak
挥发物能否被捕获在构成行星包层的背景基质中，并通过对流被拖到地表，是理解大气通量、循环和组成的关键问题。在这篇文章中，我们考虑了具有广泛的水地幔的超级地球(即水行星)，以及将甲烷捕获到其广泛的水冰包层中的可能性。我们采用了van der Waals&Platteeuw发展的固溶体模型理论来模拟笼状水合物，并对其进行了修正，以估算一种称为甲烷填充冰的新相的热力学稳定性场。我们发现，与水冰相比，充填的冰结构不仅在高压下是稳定的，而且在水行星的核-水地幔过渡边界预期的高温下也是稳定的。
Whether volatiles can be entrapped in a background matrix composing planetary envelopes and be dragged via convection to the surface is a key question in understanding atmospheric fluxes, cycles, and composition. In this paper, we consider super-Earths with an extensive water mantle (i.e., water planets), and the possibility of entrapment of methane in their extensive water-ice envelopes. We adopt the theory developed by van der Waals & Platteeuw for modeling solid solutions, often used for modeling clathrate hydrates, and modify it in order to estimate the thermodynamic stability field of a new phase called methane filled ice Ih. We find that in comparison to water ice VII the filled ice Ih structure may be stable not only at the high pressures but also at the high temperatures expected at the core–water mantle transition boundary of water planets.
影响因子：
3.2
作者：
Redmer, Ronald;Mattsson, Thomas R.;French, Martin
通讯作者：
French, Martin