Abstract Crustal segments, such as those in Eastern Turkey, which host magma chambers, volcanoes, and fault zones, experience complex stresses generated through interactions between regional tectonic loading, magmatic pressure, and geothermal dynamics. Here we model these competing loading mechanisms and examine their effects on generating stresses in a complex crustal segment which has been subjected to orogenesis and hosted voluminous magma discharge. This simulated-region hosts several volcanoes, thermal fields and has experienced complex tectonic deformation which manifests as crustal faults. We present a suite of purely thermal models to show the temperature distribution within the crust assuming an arrangement of crustal magma chambers and a realistic geothermal gradient. We also present a suite of linear elastic mechanical models to investigate the effect of magma pressure and regional tectonic loading in the absence of temperature variations using different arrangements of magma chambers and faults. Finally, we present coupled linear elastic thermomechanical models that highlight the influence of temperature on the distribution of both crustal stresses and deformation using the same complex geometries. Results show that thermal stresses generate two competing consequences, 1) they increase the level of shear stress around the magma chambers, potentially leading to fault nucleation or reactivation, and 2) they partially act to suppress the level of tensile stress originally generated both by magma pressure and tectonic loading. This implies that for any magmatic recharge event, which increases the internal magma chamber pressure, the contribution of temperature increase in the surrounding host rocks must also be taken into account when considering the distribution, magnitude and type of stresses around magma chambers in such crustal environments.

中文翻译：

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复杂构造环境中地壳岩浆房之间的热机械相互作用：来自土耳其东部的见解

摘要 地壳段，例如土耳其东部的地壳段，拥有岩浆房、火山和断层带，承受区域构造载荷、岩浆压力和地热动力学之间相互作用产生的复杂应力。在这里，我们模拟了这些相互竞争的加载机制，并研究了它们对在经历造山作用和大量岩浆排放的复杂地壳段中产生应力的影响。这个模拟区域拥有多个火山和热场，并经历了复杂的构造变形，表现为地壳断层。我们提出了一套纯热模型来显示地壳内的温度分布，假设有地壳岩浆房的排列和真实的地温梯度。我们还提出了一套线弹性力学模型，以使用不同布置的岩浆房和断层来研究在没有温度变化的情况下岩浆压力和区域构造载荷的影响。最后，我们提出了耦合线性弹性热机械模型，该模型使用相同的复杂几何结构突出了温度对地应力和变形分布的影响。结果表明，热应力会产生两个相互竞争的结果，1）它们增加了岩浆房周围的剪切应力水平，可能导致断层成核或重新激活，2）它们部分地抑制了最初由岩浆产生的拉伸应力水平压力和构造载荷。这意味着对于任何岩浆补给事件，