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首页> 外文期刊>Journal of geodynamics >Evidence from the Farmington pluton for Early Devonian subduction-related magmatism in the Carolina zone of central North Carolina
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Evidence from the Farmington pluton for Early Devonian subduction-related magmatism in the Carolina zone of central North Carolina

机译：来自北卡罗来纳州中部卡罗来纳州地区早期泥盆纪俯冲相关岩浆作用的法明顿岩体的证据

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摘要

The Concord plutonic suite consists of numerous gabbroic plutons scattered throughout the Carolina terrane with ages that cluster around 400 Ma. The Farmington pluton is located on the northeastern part of the Mocksville complex and consists mostly of gabbronorites and troctolites. Field, geochemical, and P-T studies of the Farmington gabbros suggest that the rocks are genetically related and formed by transitional to calc-alkaline differentiation of mafic magma. The pluton was formed in a moderate-pressure environment (～6 kbar) and underwent limited differentiation after emplacement. The overall geological and geochemical features of the Farmington pluton are consistent with a transitional to arc origin. The Concord plutonic suite does not fit well in classical tectonothermal models suggested for the evolution of the Appalachian orogen. However, Field and geochemical data in this report and other data reported recently suggest that the origin of the Farmington pluton and possibly the Concord plutonic suite is that the suite represents a continuous to semi-continuous Taconian-Acadian magmatic event(s).
机译：康科德（Cocord）岩体套件包括分布在整个卡罗来纳州地层的众多辉长岩体，年龄约在400 Ma附近。法明顿岩体位于Mocksville复合体的东北部，主要由辉长岩和闪闪石组成。对法明顿长袍的野外，地球化学和P-T研究表明，这些岩石具有遗传相关性，并且是由铁镁质岩浆的过渡到钙碱性转变形成的。质子在中等压力（〜6 kbar）的环境中形成，并在注入后经历了有限的分化。法明顿岩体的整体地质和地球化学特征与向弧源的过渡一致。 Concord古生代组不适用于阿巴拉契亚造山带演化的经典构造热模型。但是，该报告中的油田和地球化学数据以及最近报告的其他数据表明，法明顿岩体和可能的康科德岩体组的起源是该组代表了一个连续至半连续的塔科尼亚－阿卡迪亚岩浆事件。

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