U-Pb Geochronologic Study of Allochthonous Paleozoic-Early Mesozoic Terranes: San Juan Islands to the Okanagan Valley,Washington and British Columbia

异地古生代-早中生代地体的 U-Pb 年代学研究：圣胡安群岛至奥肯那根山谷、华盛顿和不列颠哥伦比亚省

• 批准号: 9204962
• 负责人: William McClelland
• 金额: $ 13万
• 依托单位: University of California-Santa Barbara
• 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: 1992-07-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204962&HistoricalAwards=false
• 关键词: Pb; Geochronologic; Study; Allochthonous; Paleozoic

Many terranes in the North American Cordillera contain Paleozoic arc and basinal assemblages of uncertain paleogeographic origin. Standard facies and biogeographic analysis have not been able to conclusively separate those terranes that originated along the North American margin from those that experienced greater transport. This project will expand and develop a promising new technique to help fingerprint the source of detritus now found in these detrital zircons may provide a unique signature of major precambrian cratons that would allow the separation of locally derived terranes from long-traveled allochthonous ones. The work will consist of extensive sampling in several terranes in the Pacific Northwest and single-crystal zircon age determination. Results will help build a data base and will contribute to understanding the correlation, paleogeographic setting and displacement history of Paleozoic arc and basinal sequences along the continental margin.

北美科迪勒拉山脉的许多山脉 不确定古地理的古生代弧盆组合 起源 标准相和岩相分析还没有得到 能够最终分离出那些起源于沿着 北美与那些经历了更大痛苦的国家相比， 运输 该项目将扩大和发展一个有前途的新的 这项技术可以帮助识别现在在 这些碎屑锆石可能提供了一个独特的签名， 前寒武纪的火山岩， 从长途旅行的外来物种中衍生出的物种。 工作 将包括在几个国家的广泛采样， 西北太平洋锆石单晶年龄测定。 结果将有助于建立一个数据库，并将有助于 了解相关性，古地理背景和 沿着古生界弧盆序列的位移史 大陆边缘