Collaborative Research: Deformation of Layer Silicates

合作研究：层状硅酸盐的变形

• 批准号: 8816283
• 负责人: Andreas Kronenberg
• 金额: $ 5.15万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-15 至 1992-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816283&HistoricalAwards=false
• 关键词: Collaborative; Research; Deformation; Layer; Silicates

This is a collaborative project to investigate the deformation of sheet silicates, principally the common micas, by means of triaxial deformation experiments designed to measure the critically resolved shear stresses required for (001) dislocation glide at temperatures to 700oC and pressures to 400 MPa, combined with microstructural (optical and electron microscopy) and micorchemical (electron microprobe and IR absorption) studies to determine the principal slip directions and their dependencies upon crystal chemistry and struecture. The determination of the stress-strain relations of micas will have direct applications to yield envlopes constructed the continental lithosphere, to the mechanisms of strain localization along ductile shear zones and brittel faults, and to mica-bearing metamorphic tectonites. In addition, this study should lead to a deeper understanding of dislocation glide in minearls, as it is influenced by signicicant changes in crystal chemistry and structure within a single mineral group.

这是一个合作项目，通过三轴变形实验研究片状硅酸盐的变形，主要是普通云母，设计的三轴变形实验旨在测量(001)位错在温度至700摄氏度和压力至400兆帕时滑移所需的关键解析剪应力。结合微观结构(光学和电子显微镜)和微观化学(电子探针和红外吸收)研究，确定主要滑移方向及其对晶体化学和结构的依赖性。云母应力-应变关系的确定将直接应用于大陆岩石圈的屈服环境、韧性剪切带和脆性断裂的应变局部化机制以及含云母变质构造岩。此外，这项研究将有助于加深对矿物中位错滑动的理解，因为它受到单一矿物群内晶体化学和结构的显著变化的影响。