Elastic Wave Velocity Measurements on Unquenchable Mantle Phases

不可淬灭地幔相的弹性波速度测量

• 批准号: 0003340
• 负责人: Baosheng Li
• 金额: $ 13.61万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-01-01 至 2003-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003340&HistoricalAwards=false
• 关键词: Elastic; Wave; Velocity; Measurements; Unquenchable

Li, BaoshengEAR-0003340 This proposal is focused on the study the elastic properties of two unquenchable mantle phases, high pressure phase of clinoenstatite, and calcium silicate perovskite. This project will utilize the DIA-type cubic anvil high pressure apparatus (SAM85) installed at beamline X17B1 of the NSLS at Brookhaven National Laboratory (BNL) using synchrotron X-ray radiography and X-ray diffraction techniques in conjunction with high pressure ultrasonic interferometry. The investigators will use an X-ray radiography technique to record the sample image at the same time as the travel time through the sample is measured, providing the length of the sample needed for the calculation of velocity. When the formation of the unquenchable phase is confirmed by X-ray diffraction, simultaneous measurement of pressure, temperature, volume, Vp, Vs, and the length of the sample (P-V-T-Vp-Vs-L) at subsequent P-T conditions will provide data for both equation of state analysis and the determination of the pressure and temperature derivatives of the elastic bulk and shear moduli. Such data for clinopyroxene and calcium silicate perovskite phases are crucial for interpreting seismic observations to determine the composition and the mineralogy of the mantle.

Li，Baoshengear-0003340该建议集中在研究上，两个不可抑制的地幔相，钙化晶石的高压相和硅酸钙钙钛矿的弹性特性。该项目将使用同步体X射线射线照相和X射线X射线射线照相和X射线衍射技术，利用Brookhaven国家实验室（BNL）在NSLS的Beam X17B1上安装的DIA型立方砧座高压设备（SAM85）。研究人员将使用X射线射线照相技术在测量样品的旅行时间的同时记录样品图像，从而提供计算速度所需的样品的长度。当通过X射线衍射时，在随后的P-T条件下的压力，温度，体积，VP，VP，VS，VP，VP，VS，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP，VP-VS-L）在随后的P-T条件下的长度（P-V-T-T-VP-VS-L）确认，将提供国家分析方程的数据，以同时进行数据分析的数据，以提供数据的数据。这种用于钙二烯和硅酸钙钙钛矿阶段的数据对于解释地震观测以确定地幔的组成和矿物学至关重要。