Nature of Paleozoic Crust of Western Nevada Deduced From Paleozoic Island Arc Rocks: Implications for Tectonic Evolution of Western Nevada

从古生代岛弧岩石推断内华达州西部古生代地壳的性质：对内华达州西部构造演化的启示

• 批准号: 9205666
• 负责人: Richard Schweickert
• 金额: $ 7.72万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 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: 1992-07-15 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9205666&HistoricalAwards=false
• 关键词: Nature; Paleozoic; Crust; Western; Nevada

The nature of the deep pre-Mesozoic crust is unknown in a large part of the western U.S., yet knowledge of the buried crustal rocks is critical to evaluating many of the existing tectonic models of the region. This project will attempt to determine if the pre-Mesozoic basement is a single, extensive arc terrane of continental chemistry or is a collage of smaller terranes of more oceanic composition by examination of volcanic and volicaniclastic rocks of upper Paleozoic age that were derived form the basement. Field relationships, ages and structures will be the focus of the University of Nevada researchers; extensive geochemical analyses will be the focus of the French collaborators, funded by the French CNRS. Results are expected to help resolve the nature of the pre- Mesozoic basement and therefore clarify the starting material for the major Mesozoic and Cenozoic tectonic events that affected the area.

前中生代地壳深部的性质是未知的， 美国西部的大部分地区但对埋藏地壳的了解 岩石对于评估许多现有的构造至关重要 该地区的模型。 该项目将试图确定， 前中生代基底是一个单一的、广泛的弧形构造， 大陆化学或者是一个拼贴画的较小的集合， 用火山岩和火山碎屑岩检验海洋成分 从基底衍生出来的上古生界岩石。 场的关系，年龄和结构将是重点， 内华达州大学研究人员;广泛的地球化学分析 将是法国合作者的重点，由法国资助， CNRS。 预计结果将有助于解决预- 中生代基底，因此澄清了 主要的中新生代构造事件影响了 区