Accessory Mineral Microstructure and Implications for Geochronology

副矿物显微结构及其对地质年代学的意义

• 批准号: LX0453429
• 负责人: Prof Steven Reddy
• 金额: $ 4.96万
• 依托单位: Curtin University
• 依托单位国家: 澳大利亚
• 项目类别: Linkage - International
• 财政年份: 2004
• 资助国家: 澳大利亚
• 起止时间: 2004-05-31 至 2005-05-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LX0453429
• 关键词: Accessory; Mineral; Microstructure; Implications; Geochronology

U-Pb geochronology of accessory minerals is widely used to constrain the timing of igneous, metamorphic and sedimentary processes. However, our current knowledge of isotope mobility in these important minerals cannot readily explain some common features of U-Pb dating. Using new developments in quantitative microstructural analysis integrated with high spatial resolution geochronology we will constrain the relationship between accessory minerals deformation and its effect on radiometric ages. Our results will lead to a better understanding of geochemical modification of accessory minerals and may lead to the development of new applications of geochronology and improve the dating of rock deformation.

副矿物U-Pb年代学被广泛用于约束火成岩、变质作用和沉积作用的时间。然而，我们目前对这些重要矿物中的同位素迁移率的了解不能很好地解释U-Pb测年的一些共同特征。利用定量微构造分析的新进展，结合高空间分辨率地质年代学，我们将约束副矿物变形与其对放射性年龄的影响之间的关系。我们的研究结果将有助于更好地了解副矿物的地球化学变质作用，并可能开发地质年代学的新应用，提高岩石变形的定年。