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首页> 外文期刊>Journal of Volcanology and Geothermal Research >The structural architecture of the Los Humeros volcanic complex and geothermal field
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The structural architecture of the Los Humeros volcanic complex and geothermal field

机译：Los Humeros火山复合体和地热田的结构构造

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The Los Humeros Volcanic Complex (LHVC) is a large silicic caldera complex in the Trans-Mexican Volcanic Belt (TMVB), hosting a geothermal field currently in exploitation by the Comision Federal de Electricidad (CFE) of Mexico, with an installed capacity of ca. 95 MW of electric power. Understanding the structural architecture of LHVC is important to get insights into the interplay between the volcano-tectonic setting and the characteristics of the geothermal resources in the area. The analysis of volcanotectonic interplay in LHVC benefits from the availability of subsurface data obtained during the exploration of the geothermal reservoir that allows the achievement of a 3D structural view of the volcano system. The LHVC thus represents an important natural laboratory for the development of general models of volcano-tectonic interaction in calderas. In this study, we discuss a structural model of LHVC based on morphostructural and field analysis, integrated with well logs, focal mechanism solutions and magnetotelluric imaging. The structural analysis suggests that inherited regional tectonic structures recognized in the basement played an important role in the evolution of the magma feeding system, caldera collapses and post-caldera deformations. These inherited weak planes have been reactivated by resurgence faults and post-caldera magma-driven hydrofractures under a local radial stress field generated by the shallow LHVC magmatic/hydrothermal system. The local stress field induced caldera resurgence and volcanotectonic faulting. The results of this study are important to better constrain the structural architecture of large caldera complexes. Also, our study is useful to understand the structure of the Los Humeros geothermal field and support the exploration of deeper Super-Hot Geothermal Systems (SHGSs) and engineering of Enhanced Geothermal Systems (EGSs) for electric power production in the LHVC and other active resurgent calderas. (C) 2019 Elsevier B.V. All rights reserved.
机译：Los Humeros火山综合体（LHVC）是跨墨西哥火山带（TMVB）中的大型硅质破火山口综合体，拥有目前由墨西哥电联邦委员会（CFE）开采的地热田，装机容量约为。 95兆瓦的电力。了解LHVC的结构架构对于深入了解火山构造环境与该地区地热资源特征之间的相互作用非常重要。 LHVC中火山构造相互作用的分析得益于在地热储层勘探过程中获得的地下数据的可用性，该数据允许实现火山系统的3D结构视图。因此，LHVC代表了重要的自然实验室，用于开发火山口中火山-构造相互作用的通用模型。在这项研究中，我们讨论了基于形态结构和现场分析，并结合测井，震源机制解和大地电磁成像的LHVC结构模型。结构分析表明，在地下室中识别的继承的区域构造结构在岩浆供给系统的演化，破火山口塌陷和破火山口变形中起了重要作用。这些浅薄的LHVC岩浆/热液系统在局部径向应力场作用下，通过回弹断层和火山口后岩浆驱动的水力破裂，重新激活了这些继承的弱平面。局部应力场引起破火山口回潮和火山构造断裂。这项研究的结果对于更好地限制大型破火山口配合物的结构结构很重要。此外，我们的研究对于了解Los Humeros地热场的结构和支持更深的超热地热系统（SHGSs）的探索以及增强地热系统（EGSs）的工程以在LHVC和其他活跃的复兴中生产电力提供了帮助。破火山口。 （C）2019 Elsevier B.V.保留所有权利。

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