Grenville Marble Mylonites

实验变形方解石的研究产生了一个非常完整的数据集，可能适用于大理石糜棱岩的变形过程。然而，从天然大理石剪切带中获得的数据很少，因此限制了实验室数据对自然系统重要性的评估。本项目是对安大略省格伦维尔中部变质沉积带中保存完好的大理岩糜棱岩进行综合显微结构研究。对这个剪切带的研究提供了一个天然的实验室来检查从原岩到超糜棱岩不等的变形大理石的过程。结果将提供现场证据，以允许实验和自然产生的纹理的比较，因为它适用于实验推导的流动规律的额外极点地质条件。

Studies of experimentally deformed calcite have produced a remarkably complete data set that potentially apply to deforma- tion processes in marble mylonites. However, few data are avail- able from natural marble shear zones, thus limiting assessment of the importance of the laboratory data to natural systems. This project is an integrated microstructural study of a well preserved marble mylonite from the central metasedimentary Belt of the Ontario Grenville. The study of this shear zone provides a natural laboratory to examine processes in a variably deformed marble, ranging from protolith to ultra-mylonite. Results will provide field evidence to allow a comparison of experimentally and naturally produced textures as it applies to the extra- polation of experimentally-derived flow laws to geological conditions.