Silicate Melting and Vaporization During Rocky Planet Formation
Silicate Melting and Vaporization During Rocky Planet Formation
复制标题
岩石行星形成过程中的硅酸盐熔化和蒸发
DOI:
--
复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Stein B. Jacobsen4
中科院分区:
文献类型:
--
作者:
E. Davies;Phil J. Carter;Seth Root;R. Kraus;D. Spaulding;Sarah T. Stewart;Stein B. Jacobsen4
Collisions that induce melting and vaporization can have a substantial effect on the thermal and geochemical evolution of planets. However, the thermodynamics of major minerals are not well known at the extreme conditions attained during planet formation. We obtained new data at the Sandia Z Machine and use published thermodynamic data for the major mineral forsterite (Mg 2 SiO 4 ) to calculate the specific entropy in the liquid region of the principal Hugoniot. We use our calculated specific entropy of shocked forsterite, and revised entropies for shocked silica, to determine the critical impact velocities for melting or vaporization upon decompression from the shocked state to 1 bar and the triple points, which are near the pressures of the solar nebula. We also demonstrate the importance of the initial temperature on the criteria for vaporization. Applying these results to N ‐body simulations of terrestrial planet formation, we find that up to 20% to 40% of the total system mass is processed through collisions with velocities that exceed the criteria for incipient vaporization at the triple point. Vaporizing collisions between small bodies are an important component of terrestrial planet formation.
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DOI:
10.1088/0004-637x/806/1/23
发表时间:
2015
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Leinhardt Z
通讯作者:
Leinhardt Z
DOI:
10.1088/0004-637x/751/1/32
发表时间:
2012
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Stewart S
通讯作者:
Stewart S
影响因子:
5.3
作者:
Carter P
通讯作者:
Carter P
影响因子:
4.9
作者:
Carter, Philip. J.;Leinhardt, Zoe M.;Stewart, Sarah T.
通讯作者:
Stewart, Sarah T.
影响因子:
4.9
作者:
Leinhardt, Zoe M.;Stewart, Sarah T.
通讯作者:
Stewart, Sarah T.