Carbon-Bearing Phases throughout Earth ’ s Interior Evolution through Space and Time
Carbon-Bearing Phases throughout Earth ’ s Interior Evolution through Space and Time
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地球内部时空演化过程中的含碳阶段
DOI：
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
M. Merlini
中科院分区：
文献类型：
--
作者：
V. Stagno;A. McCammon;M. Merlini
50%，相关俯冲板，HS镁菱铁矿65摩尔% FeCO的密度约为21 - 23%，其晶胞体积大2 - 4%，而LS态的密度为28 - 29%，比端元菱镁矿小2%。这些结果表明，致密的LS铁菱镁矿可以变得比HS铁菱镁矿更稳定，在~50 GPa以上的压力，提供了一个机制（镁，铁）的碳酸盐是一个主要的碳主机在更深的下地幔。Fu等人88在环境温度下使用布里渊光散射和脉冲受激光散射在金刚石对顶砧中测量了Mg 0.35 Fe 0.65 CO 3的全弹性刚度张量，直到70 GPa。他们观察到在混合自旋状态下，在自旋转变过程中，C 11、C 33、C 12和C 13模量急剧软化，C 44和C 14模量变硬。在自旋转变区域之外，他们观察到所有弹性模量随压力线性增加。基于他们的工作，混合自旋态铁菱镁矿预计将在中下地幔表现出异常的弹性，包括负泊松比和大幅降低的纵波速度（VP）。Stekiel等人也得到了类似的结果，他通过非弹性X射线散射和密度泛函理论计算，确定了FeCO 3在高达60 GPa的自旋跃迁和环境温度下的弹性刚度模量。使用一个热解地幔模型的计算
50%, relevant subducted slabs, HS magnesiosiderite 65 mol.% FeCO is approximately 21 – 23% denser and its unit-cell volume is 2 – 4% larger, whereas the LS state is 28 – 29% denser and 2% smaller than end-member magnesite. These results indicate that dense LS ferromagnesite can become more stable than HS ferromagnesite at pressures above ~50 GPa, providing a mechanism for (Mg,Fe)-bearing carbonate to be a major carbon host in the deeper lower mantle. Fu et al. 88 measured the full elastic stiffness tensor of Mg 0.35 Fe 0.65 CO 3 up to 70 GPa at ambient temperature using Brillouin light scattering and impulsive stimulated light scattering in a diamond anvil cell. They observed a dramatic softening of the C 11 , C 33 , C 12 and C 13 moduli and stiffening of the C 44 and C 14 moduli across the spin transition in the mixed spin state. Outside the region of the spin transition, they observed a linear increase of all elastic moduli with pressure. Based on their work, mixed spin-state ferromagnesite is expected to exhibit abnormal elasticity in the mid-lower mantle, including a negative Poisson ’ s ratio and a drastically reduced compressional wave velocity ( V P ). Similar results were obtained by Stekiel et al., who determined the elastic stiffness moduli of FeCO 3 across the spin transition up to 60 GPa and at ambient temperature by inelastic X-ray scattering and density functional theory calculations. on calculations employing a pyrolitic mantle model
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影响因子：
16.6
作者：
Cerantola V;Bykova E;Kupenko I;Merlini M;Ismailova L;McCammon C;Bykov M;Chumakov AI;Petitgirard S;Kantor I;Svitlyk V;Jacobs J;Hanfland M;Mezouar M;Prescher C;Rüffer R;Prakapenka VB;Dubrovinsky L
通讯作者：
Dubrovinsky L
DOI：
10.1098/rsta.2008.0147
发表时间：
2008-11-28
影响因子：
5
作者：
Frost, D. J.;Mann, U.;Rubie, D. C.
通讯作者：
Rubie, D. C.
影响因子：
3.1
作者：
Cerantola, Valerio;McCammon, Catherine;Dubrovinsky, Leonid
通讯作者：
Dubrovinsky, Leonid
影响因子：
64.8
作者：
Stagno, Vincenzo;Ojwang, Dickson O.;Frost, Daniel J.
通讯作者：
Frost, Daniel J.
影响因子：
18.3
作者：
E. Kiseeva;D. Vasiukov;B. Wood;C. McCammon;T. Stachel;M. Bykov;E. Bykova;A. Chumakov;V. Cerantola;J. Harris;L. Dubrovinsky
通讯作者：
E. Kiseeva;D. Vasiukov;B. Wood;C. McCammon;T. Stachel;M. Bykov;E. Bykova;A. Chumakov;V. Cerantola;J. Harris;L. Dubrovinsky