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首页> 外文期刊>Journal of Volcanology and Geothermal Research >A numerical model for the magmatic heat reservoir of the Las Tres Virgenes volcanic complex, Baja California Sur, Mexico
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A numerical model for the magmatic heat reservoir of the Las Tres Virgenes volcanic complex, Baja California Sur, Mexico

机译：Las Tres Virgenes火山复合物，Baja California Sur，墨西哥的数值模型

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摘要

Numerical models of geothermal systems have achieved considerable progress when dealing with fundamental transport processes. Site-specific geothermal models however, often face the lack of sufficient field data, which leads to under constrained models. Recent field studies in the Las Tres Virgenes volcanic complex (TVVC) provide us with a sound framework to build a numerical model for the magmatic heat reservoir of the geothermal area. Here we present a conceptual model of the system from 30 ka to present based on updated structural and geochronological studies. The heat reservoir is described from Enhanced Seismic Tomography of the TVVC. New field data also allow an estimate of the radiogenic heat generation in the batholith of the study area. Latent heat of crystallization is also considered in the cooling of magmatic intrusions. The transient heat transfer equation is solved with a finite volume numerical method and a conjugate gradient algorithm. The model is calibrated using the estimated heat flow in the area from the literature. The simulation results predict slow cooling of the heat reservoir, with the maximum temperature decreasing about 9 degrees C in 30 ky. The temperature field within the magmatic heat reservoir overall remains between about 790 degrees C (8 km bsl) and 300 degrees C (3 km bsl), in the order of the temperatures at which magmatic processes, such as magma mixing and replenishments, have been inferred from the eruptive history. Whereas the phase ratio (solid/melt) ranges from 1, at the top, to below 0.1 at the bottom of the heat reservoir. Convective transport and explicit thermal-chemical coupling in the heat reservoir is proposed as a future expansion of this work.(c) 2021 Elsevier B.V. All rights reserved.
机译：地热系统的数值模型在处理基本运输过程时取得了相当大的进展。然而，特定于网站的地热模型通常面临缺乏足够的现场数据，这导致受约束模型。 LAS TRES TRES VIRCENES VIRCANIC COMPLER（TVVC）的最近的现场研究为我们提供了一种合理的框架，为地热区域的岩浆储层构建数值模型。在这里，我们基于更新的结构和地理学研究，从30 KA展示了系统的概念模型。热储存器由TVVC的增强地震性断层扫描描述。新的现场数据还允许估计研究区域的涂料中的辐射发热。在岩浆侵入的冷却中也考虑结晶的潜热。瞬态传热方程用有限积的数值方法和共轭梯度算法来解决。使用来自文献的区域的估计热流校准该模型。仿真结果预测热储存器的缓慢冷却，最高温度在30ky中减小约9摄氏度。岩浆热储存器内的温度场总体仍然在约790摄氏度（8km BS1）和300摄氏度（3km BSL）之间，按照岩浆工艺（例如岩浆混合和补货）的温度的顺序从爆发史上推断出来。虽然相比（固体/熔体）在热储存器底部的顶部的1，顶部至下降0.1。提出了热储层中的对流运输和显式热化学耦合作为这项工作的未来扩展。（c）2021 Elsevier B.v.保留所有权利。

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