Paleomagnetic Investigations in Central Chile: Tectonics ofthe Andean Orogen

智利中部的古地磁调查：安第斯造山带的构造

• 批准号: 8718896
• 负责人: Myrl Beck
• 金额: $ 6.65万
• 依托单位: Western Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1991-08-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8718896&HistoricalAwards=false
• 关键词: Paleomagnetic; Investigations; Central; Chile; Tectonics

The Andean mountain chain is the classic example of orogenesis due to subduction of oceanic lithosphere beneath continental crust. Paleomagnetic studies have detected a systematic pattern of block rotations in the Andes and Coast Range of Chile and Peru, with counterclockwise rotations in Peru and clockwise ones in Chile, that affect rocks as young as latest cretaceous. This research will collect new paleomagnetic data in central Chile that will help determine the cause of the rotations and distinguish between several current hypotheses. Results will not only be important in understanding Andean tectonics, but will be of interest in understanding Andean-type tectonic responses elsewhere.

安第斯山脉是 大洋岩石圈俯冲造山作用 大陆地壳 古地磁研究发现 安第斯山脉和海岸的块体旋转的系统模式 智利和秘鲁的范围，在秘鲁逆时针旋转 以及智利的顺时针方向， 白垩 这项研究将收集新的古地磁数据， 智利中部，这将有助于确定旋转的原因 并区分当前的几种假设。 结果将 不仅对理解安第斯构造很重要， 对理解安第斯型构造响应 其他地方