A Geochronologic, Structural, and Petrologic Investigation of Proterozoic Tectonism and Metamorphism in the Llano Uplift, Texas

德克萨斯州亚诺隆起元古界构造作用和变质作用的年代学、结构和岩石学研究

• 批准号: 8804717
• 负责人: Nicholas Walker
• 金额: $ 8.44万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-15 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8804717&HistoricalAwards=false
• 关键词: Geochronologic; Structural; Petrologic; Investigation; Proterozoic

The Llano Uplift of central Texas records middle Proterozoic tectonism and metamorphism that has not been overprinted by subsequent events, unlike other Grenville-aged provinces in Canada and the Appalachians. This project will concentrate on U-Pb geochronometry integrated with field, petrographic, and analytical data constraining the timing of sequential deformational, meta- morphic and intrusive events will test several current hypotheses of the tectonic setting of the Precambrian margin of North America. Results of this study of the Llano Uplift are expected to be applicable to understanding the evolution of the Grenville orogen along the entire margin.

德克萨斯州中部的拉诺隆起记录了中元古代的构造和变质作用，没有被后来的事件覆盖，不像加拿大其他格伦维尔时期的省份和阿巴拉契亚山脉。该项目将集中于U-Pb地质年代学，结合野外、岩石学和分析数据，限制顺序变形、变质和侵入事件的时间，将测试目前关于北美前寒武纪边缘构造背景的几个假设。对拉诺隆起的研究结果有望应用于了解格伦维尔造山带沿整个边缘的演化。