COLLABORATIVE RESEARCH: Cretaceous Paleomagnetic Tests of the Baja British Columbia Hypothesis

合作研究：白垩纪古地磁对巴哈不列颠哥伦比亚省假说的测试

• 批准号: 9807741
• 负责人: Joseph Kirschvink
• 金额: $ 3.77万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9807741&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Cretaceous; Paleomagnetic; Tests

9807741 Kirschvink The Cordillera of western North America is composed of an amalgamation of tectonic terranes, attached at various times onto the stable North American craton, after being transported variable distances from their origins. This transport and amalgamation history is not well known and has given rise to several conflicting ideas. These proposals address two important but conflicting and mutually exclusive hypotheses, namely whether the Insular superterrane, presently in western British Columbia, originated in the Cretaceous north of California (no or small northward movement) or from far to the south, near Baja California. The work will be a careful reassessment of prior data and the assumptions underlying those data. Results are expected to help resolve the important controversy about the origins of the Insular terrane.

9807741 Kirschvink 北美西部的科迪勒拉山脉由构造地体的融合组成，这些构造地体在不同时期附着在稳定的北美克拉通上，并从其起源迁移了不同的距离。 这种运输和合并的历史并不为人所知，并且引起了一些相互矛盾的想法。 这些提议提出了两个重要但相互冲突且相互排斥的假设，即目前位于不列颠哥伦比亚省西部的岛屿超级地体是否起源于加利福尼亚州北部的白垩纪（没有或小幅向北移动），还是从遥远的南部，靠近下加利福尼亚州。 这项工作将仔细重新评估先前的数据以及这些数据背后的假设。 预计结果将有助于解决有关岛屿地体起源的重要争议。