Interrelation of Granitic Magmatism, Metamorphism and Deformation, within an Extensional Tectonic Setting, Kiqluaik Mountains, Seward Peninsula Alaska

阿拉斯加苏厄德半岛基克卢艾克山脉伸展构造环境中花岗岩岩浆作用、变质作用和变形的相互关系

• 批准号: 9117419
• 负责人: James Wright
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-15 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117419&HistoricalAwards=false
• 关键词: Interrelation; Granitic; Magmatism; Metamorphism; Deformation

Prior studies in the Kigluaik Mountains of the Seward Peninsula, Alaska have raised the possibility that Cretaceous granites were emplaced in a large-magnitude extension event, rather than during a compressional, crustal thickening event as previously thought. This project involves age dating and chemical and isotopic petrogenetic studies to test between the two different hypotheses. Results will assist other studies in the area by providing age control, and will give insight into processes leading to the production of granitic melts in several tectonic environments.

此前对阿拉斯加西沃德半岛Kigluaik山脉的研究提出，白垩纪花岗岩可能是在大规模伸展事件中侵位的，而不是像之前认为的那样，是在挤压地壳增厚事件期间侵位的。该项目包括年龄测定以及化学和同位素岩石成因研究，以检验两种不同的假说。这些结果将通过提供年龄控制来辅助该地区的其他研究，并将深入了解在几个构造环境中导致花岗岩熔体产生的过程。