Proterozoic Assembly of the Northern Colorado Front Range

北科罗拉多前缘山脉的元古代组合

• 批准号: 9804712
• 负责人: Jane Selverstone
• 金额: $ 12.86万
• 依托单位: University of New Mexico
• 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: 1998-06-15 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9804712&HistoricalAwards=false
• 关键词: Proterozoic; Assembly; Northern; Colorado; Front

9804712 Selverstone The assembly of continental crust of the American west during the proterozoic involves successive accretion of arc material from north to south, with early collision between the Colorado province and the Wyoming province, as marked by 1.4 Ga thrusting. However, new evidence for even earlier polymetamorphism and strike slip translation has raised the possibility of significant complications to these accretion events. This project will pursue these issues with an integrated kinematic, petrologic, geochronologic and isotopic study of the northern Front Range. Results are expected to clarify early accretionary tectonics between the Colorado and Wyoming provinces.

9804712自流石元古代美国西部陆壳的拼装包括从北向南连续的弧物质积累，科罗拉多省和怀俄明省的早期碰撞，以1.4Ga的逆冲为标志。然而，更早的多变质作用和走滑平移的新证据增加了这些吸积事件发生重大并发症的可能性。该项目将通过对北部前锋山脉进行运动学、岩石学、地质年代学和同位素综合研究来解决这些问题。预计结果将澄清科罗拉多省和怀俄明州之间的早期沉积构造。