Collaborative Research: Crystallization Ages and Thermal Histories of Adirondack Anorthosites and Anatectites: Implications for Anorthosite Emplacement and Thermal Contributions to

合作研究：阿迪朗达克斜长岩和深辉岩的结晶年龄和热历史：对斜长岩侵位和热贡献的影响

• 批准号: 0125312
• 负责人: Marion Bickford
• 金额: $ 12.99万
• 依托单位: Syracuse University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0125312&HistoricalAwards=false
• 关键词: Collaborative; Research; Crystallization; Ages; Thermal

01253120125057BickfordValleyLarge anorthosite bodies associated with high-grade regional metamorphism and anatectites are nearly restricted to orogens of Precambrian age. They may indicate different conditions for Precambrian tectonics or different circumstances of plate interactions, however to test various models for their formation an accurate temporal framework for the development of metamorphism, anatexis, melt accumulations and emplacement in orogens is required. This project will utilize the well studied Adirondack sector of the Grenville orogeny which contains classic anorthosite plutons to develop a detailed chronology of events. Results are expected to produce sufficient data to test models of anorthosite development, which will have applications in other Precambrian orogenic belts.

与高级别区域变质作用和斜长岩相关的大型斜长岩体几乎局限于前寒武纪造山带。它们可能表明前寒武纪构造的不同条件或板块相互作用的不同情况，然而，为了检验它们形成的各种模型，需要一个准确的变质作用、深熔作用、熔体堆积和造山带侵位发育的时间框架。该项目将利用经过充分研究的格伦维尔造山带阿迪朗达克板块，其中包含经典的斜长岩体，以制定详细的事件年表。研究结果有望为验证斜长岩发育模型提供足够的数据，并将在其他前寒武纪造山带中得到应用。