Elasticity of Single Crystal Olivine as a Function of Composition, Pressure and Temperature to 6 GPa and 1100 K: GHz Ultrasonic Interferometry in a Diamond Anvil Cell

在5 GPa和1000 K的高P、高T环境下同时测量不同铁含量的单晶橄榄石样品的弹性性能。新的数据将提供弹性各向异性作为P-T条件下成分的函数的知识，适用于解释地球上地幔的地震各向异性。为了解释观测到的地震各向异性，这些数据将首次准确地解决需要多少橄榄石或上地幔各向异性带有多厚的问题。新的数据还将提供橄榄石的总体特性的信息，作为其铁含量的函数，以及交叉压力和温度对这种地幔硅酸盐弹性的影响。这些数据将用于建立更好的矿物学模型来解释上地幔深处的地震速度变化，同时考虑到岩石学观察到的上地幔橄榄石样品中铁含量的变化。

9725239 Spetzler The elastic properties of single crystal olivine samples with different Fe contents will be measured in a simultaneous high P and high T environment to 5 GPa and 1, 000 K. The new data will provide knowledge of the elastic anisotropy as functions of composition at P-T conditions appropriate for interpreting the seismic anisotropy of Earth's upper mantle. The data will be the first to accurately address the issue of how much olivine is needed or how thick the anisotropy zone in the upper mantle is in order to explain the observed seismic anisotropy. The new data will also yield information on the bulk properties of olivine as a function of its Fe content and the cross pressure and temperature effect on the elasticity of this mantle silicate. These data will be used to establish better mineralogical models to interpret the seismic velocity variation at depths of the upper mantle, taking into account the petrological observations of the varying Fe contents of olivine samples originating from the upper mantle.