RUI: Age of Paleozoic Felsic Volcanics in Eastern Vermont

RUI：佛蒙特州东部古生代长英质火山岩的年龄

• 批准号: 9117820
• 负责人: Paul Karabinos
• 金额: $ 6.5万
• 依托单位: Williams College
• 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: 1992-04-01 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117820&HistoricalAwards=false
• 关键词: RUI; Age; Paleozoic; Felsic; Volcanics

The tectonic history of New England includes several paleozoic orogenies that involved collision and accretion of island arc fragments and continental blocks. Because of this tectonic complexity, stratigraphic and structural correlations are difficult and despite extensive study, several key relationships are equivocal. Recent work has shown that a volcanic unit thought to be a remnant of an island arc that collided with North America during the Taconic contains rocks of two distinctly different ages - Silurian and Cambrian. This RUI project will restudy this unit by mapping and radiometric age dating in order to resolve the stratigraphic position of the fragment or fragments. Results will help to better constrain tectonic models of western New England.

新英格兰的构造史包括几次古生代造山运动，这些造山运动涉及岛弧碎片和大陆块体的碰撞和增生。由于这种构造的复杂性，地层和构造的对比是困难的，尽管进行了广泛的研究，但一些关键的关系是模棱两可的。最近的研究表明，一个火山单元被认为是Taconic时期与北美碰撞的岛弧的残余，其中包含两个明显不同时代的岩石——志留纪和寒武纪。该RUI项目将通过测绘和放射性测年对该单元进行重新研究，以确定碎片或碎片的地层位置。研究结果将有助于更好地约束新英格兰西部的构造模式。