Eruptive chronology of the Acoculco caldera complex – A resurgent caldera in the eastern Trans-Mexican Volcanic Belt (México)

Avellán, Denis Ramón; Macías, José Luis; Layer, Paul W.; Sosa-Ceballos, Giovanni; Gómez‐Vasconcelos, Martha Gabriela; Cisneros-Máximo, Guillermo; Sánchez-Núñez, Juan Manuel; Martı́, Joan; García-Tenorio, F.; López‐Loera, Héctor; Pola, Antonio; Benowitz, Jeff

doi:10.1016/j.jsames.2019.102412

Cited by 22 publications

(18 citation statements)

References 31 publications

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“…The latter value indicates a renewed magma ID near to the top of the early magmatic chamber, which may be consistent with the piston‐like deformation proposed by Avellan et al. (2020) for the ACC. Overall, the experimental results show a satisfactory correlation with the parameters and deformation features of the investigated natural calderas (i.e., LPC and ACC).…”

Section: Implications Of Modeling For the Los Potreros Caldera And Otsupporting

confidence: 89%

“…(e and f) Main features of the Acoculco caldera complex, eastern TMVB. (e) Schematic geological cross section during its resurgence stage, and (f) fault pattern of resurgent area (adapted from Avellán et al., 2020).…”

Section: Implications Of Modeling For the Los Potreros Caldera And Otmentioning

confidence: 99%

“…The Acoculco caldera complex (ACC; López‐Hernández et al., 2009) provides further hints on the relationship between ID and surface fault pattern. This feature lies some 85 km west‐northwest to the LPC and shows a 18 × 16 km caldera depression controlled by pre‐existing fault systems (Avellán et al., 2020). According to Avellán et al.…”

Section: Implications Of Modeling For the Los Potreros Caldera And Otmentioning

confidence: 99%

“…On the basis of magnetic anomalies, Avellán et al. (2020) hypothesize that caldera resurgence was driven by renewed magma overpressure at the base of the Jurassic‐Cretaceous limestone (Figure 12e), which lies approximately between 4 and 5 km depth (Calcagno et al., 2018). If this correlation is correct, then the natural ID would scale very well with that applied to Model LR‐02.…”

Section: Implications Of Modeling For the Los Potreros Caldera And Otmentioning

confidence: 99%

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Modeling Intra‐Caldera Resurgence Settings: Laboratory Experiments With Application to the Los Humeros Volcanic Complex (Mexico)

et al. 2021

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• Scaled experimental models have explored the influence of different boundary conditions in controlling the style of caldera resurgence • Models investigated the role of intrusion depth, symmetry of collapse and the presence of existing faults on resurgence processes • Models simulate many characteristics of resurgent calderas, such as the sub-orthogonal fault pattern at the Los Humeros Volcanic Complex

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Section: Implications Of Modeling For the Los Potreros Caldera And Otsupporting

confidence: 89%

Section: Implications Of Modeling For the Los Potreros Caldera And Otmentioning

confidence: 99%

Section: Implications Of Modeling For the Los Potreros Caldera And Otmentioning

confidence: 99%

Section: Implications Of Modeling For the Los Potreros Caldera And Otmentioning

confidence: 99%

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Modeling Intra‐Caldera Resurgence Settings: Laboratory Experiments With Application to the Los Humeros Volcanic Complex (Mexico)

et al. 2021

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“…The reactivation of inherited faults by continental rifting is an important issue, as these features have the ability to focus the ascent of magmas and related hydrothermal fluids. These structures may have played an important role in the localization of volcanic and caldera complex systems (e.g., the Acoculco caldera complex and the Los Humeros volcanic complex; Avellán et al, 2020; Figure 9b). Here, magma and associated hydrothermal fluids might have migrated by exploiting secondary permeability associated with preexisting structures.…”

Section: Discussionmentioning

confidence: 99%

Exploring the Interactions Between Rift Propagation and Inherited Crustal Fabrics Through Experimental Modeling

et al. 2020

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Continental rifting is a geodynamic process that involves the breakup of the crust and may eventually evolve to seafloor spreading. Although it is often assumed to be a product of orthogonal divergence, continental rifting may result from oblique extension, and in several cases, it is related to the rotation of plates or crustal blocks about a vertical axis. This implies the occurrence of rifts with straight but not parallel margins and rift axis-parallel gradients in extension velocity and amount of strain. The effects of rift propagation through the continental crust has only recently started to be addressed, and even less investigated is the interaction between rift propagation and inherited crustal fabrics. We have studied this issue by carrying out a series of analog laboratory experiments. Modeling results suggest that inherited linear discontinuities in the model brittle upper crust that are oriented above a threshold angle (≥45°) from the orthogonal to the rift axis have the ability to interact with rift-related structures. Depending on their orientation, such inherited discontinuities are reactivated as either transfer zones or rift-bounding faults. We compare our models with four natural prototypes in which rift propagation is likely to have occurred (the Trans Mexican Volcanic belt, the Gofa Province, the Gulf of Suez, and the Kenya Rift). For each case study, we show how the kinematics of propagating rifts is comparable to our model results, and we provide insights into how rift-related deformation may interact with inherited crustal fabrics. Plain Language Summary When the continental Earth's crust breaks due to tensional tectonic forces, deep depressions called continental rifts form. Over geological time, these features may ultimately evolve to oceans. This process is often assumed to occur symmetrically, but it has been shown that this is rarely the case. Indeed, continental rifting is often generated by the rotation of tectonic plates, which induces changes in the extension velocity along the length of the rift. In order to understand the evolution of many natural rifts, it is also important to determine how rifting interacts with existing discontinuities in the crust (e.g., faults). This issue has only been recently addressed by laboratory experimental models, in which natural processes are simulated at reduced time and length scales, using appropriate analog materials to replicate the physical properties of natural rocks. We have performed a series of experiments that test this interaction, discovering that preexisting faults can have a strong influence on the formation and evolution of continental rifts. To verify this correlation, we have compared our models with four (Mexico, Ethiopia, Egypt, and Kenya) natural cases, finding that older faults have often influenced the rifting process and the resulting structure.

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Ultra-crystalline pyroclastic deposits and rhyolitic lavas controlled by crystal mushes: insights from the Acoculco Caldera Complex, México

Boijseauneau-López,

Sosa-Ceballos,

Farfán

et al. 2023

Contrib Mineral Petrol

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The Acoculco Caldera Complex (ACC), located in eastern Mexico, began its activity during the Pleistocene ~ 2.7 Ma. One of the most relevant and largest rhyolitic eruption in the complex, the Piedras Encimadas Ignimbrite (PEI), occurred during the late post-caldera phase at ~ 1.2 Ma. This ignimbrite is unique with respect to the other caldera products and other contemporaneous ignimbrites in the Trans-Mexican Volcanic Belt (TMVB) because of its ultra-high crystallinity and the absence of pumice fragments. The PEI is made almost entirely of crystals where the main constituents are k-feldspars and silica polymorphs that range from ≤ 5 µm to tens of centimeters in size. XRD on bulk rock, geochemical modeling, FTIR, Raman, and EPMA analyses were carried out in all mineral phases to assess the origin and the causes of high crystallinity within the PEI. We interpret the high crystallinity on the basis of magmatic crystallization of a magma body that was remobilized and altered by post-depositional hydrothermal alteration processes. We suggest that ACC rhyolites are geochemically influenced by at least one crystal mush established during the Pleistocene. We suggest that the PEI could be the result of an erupted crystal mush (melt + crystals), or a cumulate, or an ancient and crystallized reservoir generated after the first ACC collapse due to intrusion or underplating of mafic hot magmas. Extensional episodes within the ACC facilitated the ascent of mafic magmas. This interaction increased the liquid fraction of the mush through partial melting/crystal dissolution, generating a drop in density and viscosity in the mush, thus triggering eruption. The PEI provides evidences for an association between the geochemically-diverse ACC rhyolites with the complex interaction between mafic transitional alkaline magmas and a crustal mush system, promoted by continuous changes in the stress field during the Pleistocene.

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Eruptive chronology of the Acoculco caldera complex – A resurgent caldera in the eastern Trans-Mexican Volcanic Belt (México)

Cited by 22 publications

References 31 publications

Modeling Intra‐Caldera Resurgence Settings: Laboratory Experiments With Application to the Los Humeros Volcanic Complex (Mexico)

Modeling Intra‐Caldera Resurgence Settings: Laboratory Experiments With Application to the Los Humeros Volcanic Complex (Mexico)

Exploring the Interactions Between Rift Propagation and Inherited Crustal Fabrics Through Experimental Modeling

Ultra-crystalline pyroclastic deposits and rhyolitic lavas controlled by crystal mushes: insights from the Acoculco Caldera Complex, México

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