Deformation and the Mechanisms of Ar Loss in Mylonite Zones

糜棱岩带变形及Ar损失机制

• 批准号: 9506063
• 负责人: Kip Hodges
• 金额: $ 12.56万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506063&HistoricalAwards=false
• 关键词: Deformation; Mechanisms; Ar; Loss; Mylonite

One of the fundamental goals of tectonic research is to age date the formation of geologic structures and associated deformation fabrics. This project will attempt to apply the argon dating technique to a mylonite, whose age is tightly constrained by independent means. The work involves laser microprobe 40Ar/39Ar age determinations and standard electron microprobe and TEM methods. Results are expected to provide a better understanding of the way in which structural defect development and recrystalization associated with mylonitization affects Argon loss mechanisms in deformed rocks. Such information is required to develop a reliable and useful geochronometric method for mylonite events.

构造研究的基本目标之一是确定地质构造及其变形组构的形成年代。 本项目将尝试将氩定年技术应用于糜棱岩，其年龄受到独立方法的严格限制。 工作包括激光微探针40 Ar/39 Ar年龄测定和标准电子探针和TEM方法。 结果预计将提供一个更好的理解的方式，其中结构缺陷的发展和再结晶与糜棱岩化影响变形岩石中的氩损失机制。 这些信息是需要发展一个可靠的和有用的糜棱岩事件的地质年代学方法。