Models of large, hot orogens containing a collage of reworked and accreted terranes
Models of large, hot orogens containing a collage of reworked and accreted terranes
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DOI：
10.1139/e10-002
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发表时间：
2010-05
影响因子：
1.4
通讯作者：
C. Beaumont;R. Jamieson;M. Nguyen
中科院分区：
文献类型：
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作者：
C. Beaumont;R. Jamieson;M. Nguyen
我们描述了一个分类方案的造山带使用温度-震级（TM）图，并使用这个框架来模拟大型，热造山带，在大陆上的发展，包括一系列的少年增生，改造，变质的火山核接壤。模拟造山带的完整演化是困难的，特别是具有多个造山阶段的大型造山带。大陆组合的早期阶段产生了构造和变质组构，在模拟主要的碰撞造山带时需要考虑到这一点。在这里描述的模型中，这种继承的组构以一种简单的方式表现为一系列下地壳块体，这些块体在系统上排列得更强，朝向东太平洋大陆内部。我们调查如何影响这种结构的发展模式造山带在主碰撞阶段使用上地幔尺度（UMS）和地壳尺度（CS）有限元模型。模型呈现出历时性的三阶段演化过程。
We describe a classification scheme for orogens using Temperature–Magnitude (T–M) diagrams and use this framework for modelling large, hot orogens that evolve in continents comprising cratonic nuclei bordered by a series of juvenile accreted, reworked, and metamorphosed terranes. Modelling the complete evolution of an orogen is difficult, particularly large orogens with multiple orogenic phases. Early phases during which a continent is assembled produce a tectonic and metamorphic fabric that needs to be taken into account when modelling the main collisional orogeny. This inherited fabric is represented in a simple way in models described here by a series of lower crustal blocks that are arranged to be systematically stronger toward the cratonic continental interiors. We investigate how this fabric influences the development of the model orogen during the main collisional phase using upper-mantle-scale (UMS) and crustal-scale (CS) finite element models. The models exhibit a diachronous three-phase evolutio...