Abstract

For the first time, a thermomechanical model of a system of multilevel magma chambers above a mantle heat source has been developed to explain the formation mechanisms of intrusive complexes and metamorphic aureoles in Western Sangilen. A model of “thermal blur” at the collision stage and a model of a local magma reservoir at the transtension stage are proposed. The magmatic process was studied using a numerical thermomechanical model of the system magma reservoir–magma transport–formation of intermediate chambers–formation of metamorphic zonal complexes around intrusions at different depth levels. Modeling explains the mosaic distribution of granulite metamorphism zones in the Sangilen block. Model estimates of the duration of intrusive processes were obtained. The change in tectonic regimes in the evolution of Western Sangilen affects the depth of emplacement of gabbro–monzodiorite massifs and surrounding metamorphic aureoles.

中文翻译：

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俄罗斯多姆哈伯岩侵入体形成的热力学模型，用于识别深部变质作用与俄罗斯图瓦河西桑吉伦的辉长岩-闪长石块体之间的关系

摘要

首次建立了地幔热源之上的多级岩浆室系统的热力学模型，以解释西部桑吉兰侵入性复合物和变质的金黄色石的形成机制。提出了碰撞阶段的“热模糊”模型和过渡阶段的局部岩浆储层模型。使用系统岩浆储层－岩浆运移－中间室形成－不同深度侵入体周围变质带状复合体形成的数值热力学模型研究了岩浆作用过程。建模解释了Sangilen块体中粒状变质带的镶嵌分布。获得了侵入过程持续时间的模型估计。