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：阿拉斯加中部红宝石地体的结构和年代学分析：弧大陆碰撞和折返的热和构造过程

• 批准号: 9406404
• 负责人: William McClelland
• 金额: $ 5.26万
• 依托单位: University of California-Santa Barbara
• 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 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9406404&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Structural; Geochronologic; Analysis

9406404 McClelland 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.

9406404阿拉斯加北部和中部的麦克莱兰主要由大块大陆地壳组成，这些大陆地壳局部被海洋地壳碎片覆盖。它们之间的巨大相似性导致了人们的猜测，即它们都是北美大陆边缘的碎片，然而，在阿拉斯加中部的红宝石地体中，支持或驳斥这一假设的数据尤其稀少。该项目将提供该地区必要的热历史和构造历史，以重建俯冲和折返事件，以便与其他大陆地块进行可靠的比较。这些结果将导致科迪勒拉北部中生代古地理的锈迹模型，并回答走滑、逆冲和伸展构造在红宝石地体历史上的相对意义，以及它如何到达目前与科迪勒拉北部区域趋势的倾角的问题。