Metamorphic and Isotopic Studies of Mylonites

糜棱岩的变质和同位素研究

• 批准号: 9004277
• 负责人: Akhaury Sinha
• 金额: $ 9.99万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004277&HistoricalAwards=false
• 关键词: Metamorphic; Isotopic; Studies; Mylonites

In the evolution of mountain belts, major episodes of tectonism are often recorded by the development of rocks of the mylonite series. The relationship of deformation and associated chemical changes, at the mineral and whole rock scales, to radiometric ages is the objective of this research. The size of mineral and isotopic equilibrium domains developed during mylonitization of mafic rocks and the response of zircon and titanite will be investigated. Results will lead to applying concepts of domainal equilibrium on measuring absolute ages of selected faults in the Southern Appalachians and their geodynamic implications for the accretionary history of the Appalachian Mountain belt.

在山脉带的演化中， 构造作用往往记录在岩石的发展， 糜棱岩系 变形与伴生的关系 化学变化，在矿物和整个岩石的规模， 放射性年龄是这项研究的目标。 的大小 矿物和同位素平衡域的发展 镁铁质岩的糜棱岩化作用及锆石、 将对钛铁矿进行研究。 结果将导致应用 绝对年龄测定的域平衡概念 南阿巴拉契亚山脉的断层及其地球动力学 对阿巴拉契亚山脉增生历史的影响 山区地带。