COLLABORATIVE RESEARCH: Structural and Geochronologic Analysis of the Ruby Terrane, Central Alaska Thermal and Tectonic Processes of Arc-Continent Collision and Exhumation

合作研究：红宝石地体、阿拉斯加中部的弧大陆碰撞和折返的热和构造过程的结构和年代学分析

• 批准号: 9406480
• 负责人: Sarah Roeske
• 金额: $ 15.23万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-06-15 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9406480&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Structural; Geochronologic; Analysis

9406480 Roeske Northern and central Alaska consist primarily of large blocks of continental crust that are locally overlain by oceanic crustal fragments. Gross similarities between them has led to speculation that they are all fragments of North America's continental margin, however data to support or refute this hypothesis is particularly sparse int he Ruby terrane of central Alaska. This project will provide the necessary thermal and structural history of this area in order to reconstruct the subduction and exhumation events so that a firm comparisons to other continental blocks can be made. Results should lead to a rubust model of the Mesozoic paleogeography of the northern Cordillera and answer the question of what the relative significance of strike-slip, thrust and extensional tectonics were in the history of the Ruby terrane, and how it arrival at its current oblique angle to the regional trends in the northern Cordillera.

小行星9406480 阿拉斯加北方和中部主要由大块的大陆地壳组成，局部被海洋地壳碎片覆盖。 他们之间的巨大相似性导致了猜测 他们都是北美大陆边缘的碎片，然而支持或反驳这一假设的数据在阿拉斯加中部的红宝石中特别稀少。 该项目将提供该地区必要的热历史和结构历史，以便重建俯冲和折返事件，从而能够与其他大陆块进行可靠的比较。 结果应导致一个rubust模型的中生代古地理的北方科迪勒拉和回答的问题是什么相对意义的走滑，逆冲和伸展构造的历史红宝石岩，以及它如何到达其目前的斜角区域趋势在北方科迪勒拉。