Shock-Wave Measurements on Candidate Core Components and High Pressure-High Temperature Sound Speed Measurements

候选核心部件的冲击波测量和高压高温声速测量

• 批准号: 9204586
• 负责人: Thomas Ahrens
• 金额: $ 39.5万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1996-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204586&HistoricalAwards=false
• 关键词: Shock; Wave; Measurements; Candidate; Core

In addition to measurements on molten core materials, the PI will measure compressional and bulk wave velocities of preheated samples of selected mantle minerals and analogs, including MgO, MgA12O4, A12O3 and CaTiO3 (in the perovskite structure). He will conduct more measurements on core materials and to increase the present 2-4% accuracy of these types of measurements by upgrading recording electronics to the state-of-the-art. Such measurements are required because at present the high-temperature, low-pressure measurements of parameters, for the above mantle minerals are discrepant with variations inferred from seismic tomography and correlations of the velocity structure with the low order harmonics of the geoid.

除了对熔融堆芯材料的测量外，PI 将测量压缩波和体波速度的预热 精选的地幔矿物和类似物的样品，包括MgO， MgAl 2 O 4、Al 2 O3和CaTiO 3（在钙钛矿结构中）。 他将 对核心材料进行更多的测量， 通过升级，这些类型的测量精度可达到2-4% 最先进的记录电子设备。这种测量 是必需的，因为目前的高温，低压 上述地幔矿物的参数测量结果如下： 与从地震层析成像推断的变化不一致， 速度结构与低次谐波的相关性 大地水准面