COLLABORATIVE RESEARCH: Mechanism and Processes of Orogeny in the Crystalline Core of the North Cascades, Washington and the Southeast Coast Plutonic Complex, British Columbia

合作研究：华盛顿州北喀斯喀特结晶核和不列颠哥伦比亚省东南海岸深成杂岩的造山运动机制和过程

• 批准号: 9005074
• 负责人: Nicholas Walker
• 金额: $ 4.63万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9005074&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Mechanism; Processes; Orogeny

The Pacific northwest consists of a number of exotic terranes that were accreted to the continental margin beginning in the Cretaceous, however the tectonics and timing of the assembly is controversial. This renewal of a collaborative project will address the mechanics and processes of mid- Cretaceous Orogeny in the southeast Coast Plutonic Complex of British Columbia and its extension in the Crystalline Core of the North Cascades of Washington. Models of orogenesis to be tested include bulk shortening, transpressive thrusting, contractional thrusting and magmatic accretion. Evaluation of these models will utilize mineral thermobarometry, fabric analysis and U-Pb Zircon geochronology and pertains to a larger view of the orogen as either a collisional welt related to terrane accretion, or as a complex Andean-type magmatic arc developed on the edge of the North American craton.

太平洋西北部由许多异国情调的 在大陆边缘增生的碎屑岩， 在白垩纪，然而， 集会有争议。 这种合作的更新 该项目将解决中期的机制和过程， 东南沿海深大杂岩中的白垩纪造山作用 不列颠哥伦比亚省及其在西太平洋水晶核心的延伸 华盛顿北喀斯喀特山脉。 有待检验的造山作用模型 包括整体缩短、逆冲推覆、收缩 逆冲作用和岩浆增生作用 对这些模型的评价 将利用矿物温压法、组构分析和U-Pb 锆石地质年代学并涉及造山带的更大视野 要么是与吸积作用有关的碰撞贴边，要么是 一个复杂的安第斯型岩浆弧， 北美克拉通。