Gravity study of Los Humeros caldera complex, Mexico: Structure and associated geothermal system

Campos-Enríquez, J. O.; Arredondo-Fragoso, J.J.

doi:10.1016/0377-0273(92)90005-x

Cited by 21 publications

(11 citation statements)

References 13 publications

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“…The LHC has been studied from diverse disciplines: geology (Pérez-Reynoso 1979;Ferriz 1985), geochemistry (Verma and Lopez 1982;Verma 1983Verma , 1984Verma , 1985aVerma , 2000Ferriz 1985;Ferriz and Mahood 1987), geochronology (Ferriz and Mahood 1984), geophysics (Flores et al 1978;González-Morán and Suro-Pérez 1982;Campos-Enríquez and Arredondo-Fragoso 1992;Campos-Enríquez et al 2005), hydrothermal alteration (Arnold and González-Partida 1987;González-Partida et al 2001;Martínez-Serrano 2002; 19º10' Bienkowski et al 2005), thermophysical properties (Contreras et al 1990), geothermal well properties (Medina-Martínez 2000), reservoir studies (Tello-Hinojosa 1992), and thermal modelling (Prol and González-Morán 1982;Campos-Enríquez and Duran 1986;Verma et al 1990;Castillo-Román et al 1991 …”

Section: Los Humeros Calderamentioning

confidence: 99%

Thermal sensitivity analysis of emplacement of the magma chamber in Los Humeros caldera, Puebla, Mexico

Verma

Gómez‐Arias

Andaverde

2009

International Geology Review

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We present results of our simulation study of the effects of the depth (top of the magma chamber at 5-10 km) and volume (1000-1400 km 3 ) of the primary heat source beneath the Los Humeros caldera. The thermal gradient in the vicinity of the magma chamber calculated from the temperature excess (difference between the simulated and the initial temperatures prior to emplacement of the magma) is more sensitive to its depth of intrusion than to its volume. This relationship was quantified from multiple linear regression equations. The temperature excess at 2-3 km depth due to the emplacement of magma and its conductive cooling is also more dependent on the chamber depth than on its volume. Therefore, in the study of calderas, volcanoes, and geothermal fields, constraining the chamber depth is more important than its volume. Similarly, comparison of the thermal regime inferred along vertical and horizontal profiles shows the importance of solving the thermal transport equations in three dimensions instead of one or two dimensions.

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Section: Los Humeros Calderamentioning

confidence: 99%

Thermal sensitivity analysis of emplacement of the magma chamber in Los Humeros caldera, Puebla, Mexico

Verma

Gómez‐Arias

Andaverde

2009

International Geology Review

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“…Previous studies at Los Humeros focused already on the structural architecture of the large silicic caldera (Campos-Enriquez and Arredondo-Fragoso, 1992), but thick layers of post caldera volcanic material are expected to cover many faults and fractures (Norini et al, 2015). Fluid migration is mainly controlled by a pronounced fault network (Arellano et al, 2003;Norini et al, 2015;Peiffer et al, 2018), while petrophysical analyses of samples from the reservoir units indicate low to medium permeability (Weydt et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Magmatic volatiles to assess permeable volcano-tectonic structures in the Los Humeros geothermal field, Mexico

Jentsch

Jolie

Jones

et al. 2020

Journal of Volcanology and Geothermal Research

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Magmatic volatiles can be considered as the surface fingerprint of active volcanic systems, both during periods of quiescent and eruptive volcanic activity. The spatial variability of gas emissions at Earth's surface is a proxy for structural discontinuities in the subsurface of volcanic systems. We conducted extensive and regular spaced soil gas surveys within the Los Humeros geothermal field to improve the understanding of the structural control on fluid flow. Surveys at different scales were performed with the aim to i) identify areas of increased gas emissions (reservoir scale), ii) their relation to (un)known volcano-tectonic structures (fault scale) favoring fluid flow, and iii) determine the origin of gas emissions. Herein, we show results from a CO2 efflux scouting survey, which was performed across the main geothermal production zone (6 km x 4 km) together with soil temperature measurements. We identified five areas with increased CO2 emissions, where further sampling was performed with denser sampling grids to understand the fault zone architecture and local variations in gas emissions. CO2 efflux values range from below detection limit of the device to 1,464 g m -2 d -1 with a total output of 87 t d -1 across an area of 13.7 km 2 . Furthermore, δ 13 CCO2 and 3 He/ 4 He analyses complemented the dataset in order to assess the origin of soil gases. Carbon isotopic data cover a broad spectrum from biogenous to endogenous sources. Determined 3 He/ 4 He ratios indicate a mantle component in the samples of up to 65 % being most evident in the northwestern and southwestern part of the study area. We show that a systematic sampling approach on reservoir scale is necessary for the identification and assessment of major permeable fault segments. The combined processing of CO2 efflux and δ 13 CCO2 facilitated the detection of permeable structural segments with a connection to the deep, high-temperature geothermal reservoir, also in areas with low to intermediate CO2 emissions. The results of this study complement existing geophysical datasets and define further promising areas for future exploration activities in the north-and southwestern sector of the production field.

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“…Geological maps were compiled from INEGI (1994INEGI ( , 2002, Carrasco-Nú ñez and Ban (1994), and Hubbard (2001). Structural studies are focused on the Altiplano region with emphasis on the structure characterization of the geothermal field of Los Humeros Caldera (Campos-Enríquez and Arredondo-Fragoso, 1992;Cedillo-Rodríguez, 2000). Studies of monogenetic volcanism have been performed by Alaniz-Alvarez et al (1998) and Siebert and Carrasco-Nú ñez (2002).…”

Section: Methodsmentioning

confidence: 99%

Geomorphological evidence of the influence of pre-volcanic basement structure on emplacement and deformation of volcanic edifices at the Cofre de Perote–Pico de Orizaba chain and implications for avalanche generation

Concha-Dimas¹,

Cerca²,

Rodríguez³

et al. 2005

Geomorphology

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Gravity study of Los Humeros caldera complex, Mexico: Structure and associated geothermal system

Cited by 21 publications

References 13 publications

Thermal sensitivity analysis of emplacement of the magma chamber in Los Humeros caldera, Puebla, Mexico

Thermal sensitivity analysis of emplacement of the magma chamber in Los Humeros caldera, Puebla, Mexico

Magmatic volatiles to assess permeable volcano-tectonic structures in the Los Humeros geothermal field, Mexico

Geomorphological evidence of the influence of pre-volcanic basement structure on emplacement and deformation of volcanic edifices at the Cofre de Perote–Pico de Orizaba chain and implications for avalanche generation

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