Grenville Shear Zones of the CMB, Southern Ontario

晚期收缩造山作用通常包括 伸展塌陷分量，由于地壳 过度增厚，但延伸被认为主要影响 系统的上部。 格伦维尔省 安大略南部暴露出更深层次的结构水平， 到晚元古代碰撞造山作用， 表明这个较深的部分也经历了 后期延伸 这项研究将审查其他 韧性剪切带发生在该地区的格伦维尔 为了验证后期扩展是一个 造山构造的基本组成部分， 浅部和深部构造位置。

Late-stage contractional orogenesis commonly involves a component of extensional collapse, due to crustal overthickening, but extension is thought to affect primarily the upper parts of the system. The Grenville province of southern Ontario exposes deeper structural levels of a mid to late Proterozoic collisional orogeny, and recent results indicate that this deeper portion also underwent significant late-stage extension. This study will examine additional ductile shear zones that occur in the Grenville in this area in order to test the idea that late-stage extension is a fundamental component of Orogenic architecture in both shallow and deep structural positions.