Effect of High-Grade Metamorphism on Seismic Velocities of Rocks

本研究旨在通过测定加拿大马尼托巴省西北部上等省Pikwitonei-Sachigo亚省的地震速度，研究与变质级别增加相关的纵波和横波速度的可能变化。测量将在实验室围压高达600兆帕的情况下进行。将特别重视角闪岩-麻粒岩相边界的数据。除了解决这一重要问题外，这项研究还将提供关键的岩石性质数据，用于解释计划在西北部苏必利尔省进行的加拿大LITHOPROBE项目收集的地球物理数据。

This research is to investigate the possible changes in compressional and shear-wave velocities associated with increasing metamorphic grade by determination of seismic velocities of samples from the Pikwitonei-Sachigo subprovinces, northwestern Superior Province, in Manitoba, Canada. Measurements will be made at laboratory confining pressures up to 600 MPa. Particular emphasis will be placed on data across the amphibolite-granulite facies boundary. In addition to addressing this important question, the study will also provide key rock properties data for interpretation of geophysical data to be collected by the planned Canadian LITHOPROBE project in the northwestern Superior Province.