Tectonostratigraphic and Geochronological Analysis of the Alexander-Taku Terrane Boundary, Cleveland Peninsula to Cape Fox Area, Southern SE Alaska

克利夫兰半岛至阿拉斯加东南部福克斯地区亚历山大-塔库地体边界的构造地层学和年代学分析

• 批准号: 8803834
• 负责人: Jason Saleeby
• 金额: $ 12.8万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803834&HistoricalAwards=false
• 关键词: Tectonostratigraphic; Geochronological; Analysis; Alexander; Taku

The Alexander-Taku terrane boundary in southeast Alaska represents one of the major tectonic accretionary sutures in the North American Cordillera. Prior work has shown that the boundary consists of a major west-vergent thrust belt which formed in middle Cretaceous time in conjunction with the juxta position of the two terranes and the onset of regional plutonism of the Coast Plutonic Complex. This renewal project will complete a detailed analysis of the structure of the thrust belt and its relations with plutonism, and characterization of the stratigraphic units and depositional relations along the terrane boundary. Laboratory analysis will include Pb/U zircon and Nd/Sm-Rb/Sr geochronology, isotopic studies, bulk rock petrochemical studies and shear zone kinematic analyses. Completion of this research will provide a detailed structural and stratigraphic analysis of the Alexander- Taku terrane boundary, which will be a fundamental basis for considering the petrogenesis and structure of the Coast Plutonic Complex.

阿拉斯加州东南部的亚历山大-塔库-塔库边界 代表了一个主要的构造增生缝合线， 北美山脉 先前的研究表明， 由一条西向逆冲带组成， 中白垩纪时间， 两次火山喷发和海岸区域性深成作用的开始 深成杂岩 这个更新项目将完成一个详细的 冲断带的构造及其相互关系分析 以及地层单位的特征 以及沿着沉积边界的沉积关系。 实验室 分析将包括Pb/U锆石和Nd/Sm-Rb/Sr地质年代学， 同位素研究、岩石岩石化学研究和剪切带 运动学分析 这项研究的完成将提供一个 详细的结构和地层分析的亚历山大- 这将是一个基本的基础， 考虑到海岸深成岩系的岩石成因和结构， 复杂.