Structure of the Colima Volcanic Complex: Origin and Behaviour of Active Fault Systems in the Edifice

Norini, Gianluca; Agliardi, Federico; Crosta, Giovanni B.; Groppelli, Gianluca; Zuluaga, Maria Clara

doi:10.1007/978-3-642-25911-1_8

Cited by 8 publications

(35 citation statements)

References 71 publications

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“…The connection of seismic anomalies with the Tamazula lineament seems to be in agreement with Garduño-Monroy et al (1998), who considered this fault as a regional whole-crustal structure that facilitates magma migration beneath CVC. On the other hand, this appears to be not consistent with the hypothesis by Norini et al (2019), who interpreted these SW-NE oriented normal faults as shallow structures that were formed due to sliding of the Volcán de Colima edifice over an underlying softer layer. At the same time, these two alternative concepts do not contradict each other.…”

Section: 1029/2019jb017449contrasting

confidence: 91%

“…At the same time, these two alternative concepts do not contradict each other. Actually, extension in shallow parts of the volcano edifice as proposed by Norini et al () can be initiated along the regional fault that weakens the upper crust by tectonic fracturing and magma intrusions, as suggested by Garduño‐Monroy et al ().…”

Section: Discussionmentioning

confidence: 93%

“…CVC is the Colima Volcanic complex. (c) Structures in the area of the Colima Volcanic complex (modified from Norini et al, ). The colored areas indicate volcanic deposits of different origin.…”

Section: Introductionmentioning

confidence: 99%

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Fault‐Associated Magma Conduits Beneath Volcán de Colima Revealed by Seismic Velocity and Attenuation Tomography Studies

et al. 2019

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We present the results of tomographic studies using seismic velocity and attenuation in the area of the Colima Volcanic complex (CVC). Our dataset comprises body waves from local earthquakes recorded by the temporary seismic stations of the CODEX network in the Colima area and a few stations of the regional Mapping the Rivera Subduction Zone (MARS) networks, both deployed in 2006–2008. We obtain three‐dimensional distributions of seismic velocities and attenuation in the crust beneath the CVC area. At shallow depths, we observe a large negative anomaly to the south of CVC, coinciding with the location of the Central Colima Graben. This anomaly may represent debris avalanche deposits, as well as shallow magma reservoirs feeding the eruptions of the presently active Volcán de Colima. In contrast, the volcano edifice of Nevado de Colima, which is built of rigid igneous rocks, is associated with high‐velocity and low‐attenuation anomalies at shallow depths. In the deeper section, a major anomaly with high Vp/Vs, low Vs, and high S wave attenuation corresponds to the location of the regional Tamazula fault. As this represents a mechanically weakened zone of the crust, it may form the pathway that feeds CVC. Both velocity and attenuation models show that the fault‐associated conduit brought magma from the mantle through the lower crust to a depth of 15 km. Then, a light fraction of magma may continue to ascend, forming shallow reservoirs beneath the southern flank of CVC.

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Section: 1029/2019jb017449contrasting

confidence: 91%

Section: Discussionmentioning

confidence: 93%

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Fault‐Associated Magma Conduits Beneath Volcán de Colima Revealed by Seismic Velocity and Attenuation Tomography Studies

et al. 2019

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“…In the initial collection of June 2017, a total of 55 springs, wells, and streams were sampled, with priority given to areas with recharge potential to the carbonates that form the basement of Los Humeros [2]. Further sampling campaigns were carried out in November 2017 (18 samples), March 2018 (85 samples), and November-December 2018 (50 samples).…”

Section: Chemical and Isotopic Analysesmentioning

confidence: 99%

“…As part of the GeMEX project approved at the end of 2016, different sub-projects are being carried out in this area, one of which is the development of a hydrogeological model for the Los Humeros region. The area covered by this work includes five different hydrological basins that cover more than 15,000 km 2 (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Chemical and stable isotope composition of surface and groundwater in the surroundings of the Los Humeros Caldera, Puebla, Mexico

et al. 2019

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It is important to develop a regional hydrogeological model to identify possible recharge and discharge areas for a sustainable use of a geothermal reservoir. The Los Humeros geothermal area is situated within five surficial watersheds and coveres an area of more than 15.000 km2. A total of 208 well and spring samples were collected between June 2017 and November 2018. The stable isotope data for this region define a regression line of δDH2O = 8.032·δ18O + 12 and indicate that groundwater is recharged by regional precipitation. At least 39 groundwater wells, with a maximum temperature of 35 °C, show temperatures above the reported mean average surface temperature of 15 °C. Characteristic elements for geothermal reservoir fluids (B, Li, As) are also present in these groundwaters, indicating a possible connection between the reservoir fluid and the local groundwater through local fracture systems. Concentration of B in these hot wells is between 150 and 35000 ppb.

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Factors Contributing to Volcano Lateral Collapse

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et al. 2020

Volcanic Debris Avalanches

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Structure of the Colima Volcanic Complex: Origin and Behaviour of Active Fault Systems in the Edifice

Cited by 8 publications

References 71 publications

Fault‐Associated Magma Conduits Beneath Volcán de Colima Revealed by Seismic Velocity and Attenuation Tomography Studies

Fault‐Associated Magma Conduits Beneath Volcán de Colima Revealed by Seismic Velocity and Attenuation Tomography Studies

Chemical and stable isotope composition of surface and groundwater in the surroundings of the Los Humeros Caldera, Puebla, Mexico

Factors Contributing to Volcano Lateral Collapse

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