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

单晶橄榄石的弹性与成分、压力和温度的函数关系（在 6 GPa 和 1100 K 下：金刚石砧池中的 GHz 超声波干涉测量）

• 批准号: 9725239
• 负责人: Hartmut Spetzler
• 金额: $ 27万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-01 至 2004-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725239&HistoricalAwards=false
• 关键词: Elasticity; Single; Crystal; Olivine; Function

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.

在5 GPa和1，000 K的同时高P和高T环境中测量具有不同Fe含量的单晶橄榄石样品的弹性性质。 新的数据将提供弹性各向异性的知识，作为在P-T条件下的组成的函数，适合解释地球上地幔的地震各向异性。 这些数据将是第一个准确解决需要多少橄榄石或上地幔各向异性带有多厚的问题，以解释观察到的地震各向异性。 新的数据也将产生信息的整体性能的橄榄石作为其铁含量的函数和交叉压力和温度的影响，这种地幔硅酸盐的弹性。这些数据将用于建立更好的矿物学模型，以解释上地幔深处的地震速度变化，同时考虑到来自上地幔的橄榄石样品的不同Fe含量的岩石学观察。