Proterozoic Assembly of the Northern Colorado Front Range

9804712银银石元古代美国西部大陆地壳的组合包括由北向南的弧物质的连续增生，早期的科罗拉多州和怀俄明州之间的碰撞，以1.4 Ga的逆冲运动为标志。然而，更早的多变质作用和走滑平移的新证据提出了这些增生事件的重要复杂性的可能性。该项目将通过对北锋山脉的运动学、岩石学、地质年代学和同位素的综合研究来探讨这些问题。结果有望澄清科罗拉多州和怀俄明州之间的早期增生构造。

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.