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Synconvergent exhumation of metamorphic core complexes in the northern North American Cordillera

机译:北美北美北美核心复合物的同步挖掘

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摘要

Continental metamorphic core complexes of the northern North American Cordillera were exhumed during the early Paleogene while the Farallon-North American plate convergence rate remained high. Such convergent boundary conditions can excite localized mid-crustal exhumation in numerical simulations of collisions of softer accreted terranes with a rigid, irregular craton margin. Resulting simulated temperature-time (T-t) paths match T-t paths interpreted from observed footwall exposures in several core complexes of the northern North American Cordillera, including variability of maximum temperatures, duration of exhumation, and exhumation velocities among individual complexes.
机译:北美北部北部的大陆变质核心综合体在古代早期挖掘出古代,而法拉隆北美板融合率仍然很高。 这种收敛边界条件可以在具有刚性不规则的Craton余量的较软的凸轮的碰撞的数值模拟中激发局部中型地壳呼出。 产生的模拟温度 - 时间(T-T)路径匹配从北北美北部北部核心覆盖物中观察到的脚壁曝光中的T-T路径,包括最大温度,散发持续时间和个体复合物的呼口速度的可变性。

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