Interactions between active tectonics and gravitational deformation along the Billecocha fault system (Northern Ecuador): Insights from morphological and paleoseismological investigations

Jomard, Hervé; Saqui, D.; Baize, Stéphane; Alvarado, Alexandra; Bernard, Benjamin; Audin, Laurence; Hidalgo, Silvana; Pacheco, Daniel; Ruiz, Mario; Segovia, M.

doi:10.1016/j.jsames.2021.103406

Cited by 6 publications

(3 citation statements)

References 86 publications

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“…This geometry is typical of drape folds. Such draped folds are quite common in faults affecting volcanic material with low compaction degrees (e.g., Berryman et al., 2022; Jomard et al., 2021; Lacan et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

Paleoseismology of a Major Crustal Seismogenic Source Near Mexico City: The Southern Border of the Acambay Graben

et al. 2023

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Continental earthquakes with complex surface ruptures highlight the importance of considering the influence of strike-variable geometries of rupture propagation across neighboring faults for seismic hazard assessment (Biasi & Wesnousky, 2016;Mildon et al., 2016). When the rupture propagates through more than one fault segment, an unexpectedly large magnitude earthquake may be generated (e.g., Biasi & Wesnousky, 2017;Fletcher et al., 2014). Such multi-fault crustal ruptures on normal faults have affected the Mexican territory in historical

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Section: Discussionmentioning

confidence: 99%

Paleoseismology of a Major Crustal Seismogenic Source Near Mexico City: The Southern Border of the Acambay Graben

et al. 2023

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“…1c), which traverses the Ecuadorian Andes and extends northward into Colombia (Witt and Bourgois, 2010;Nocquet et al, 2014;Alvarado et al, 2016). Although several studies have been carried out on the slab structure (e.g., Gutscher et al, 1999;Michaud et al, 2009;Yepes et al, 2016) and the kinematics along crustal faults (e.g., Fiorini and Tibaldi, 2012;Alvarado et al, 2014Alvarado et al, , 2016Baize et al, 2020;Jomard et al, 2021), their relationship with the volcanism is under discussion.…”

Section: Introductionmentioning

confidence: 99%

Timing of Quaternary volcanism and its relationship with tectonics in the central segment of the Ecuadorian Andes

Santamaria,

Quidelleur,

Samaniego

et al. 2023

Journal of Volcanology and Geothermal Research

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“…Figure10bshows that most volcanoes from the arc do not lie above fault-systems, although their evolution might be in uenced by fault cinematics(Tibaldi et al, 2007;Alvarado et al, 2016). For instance, the Billecocha subsystem (B-fs) might have in uenced the orientation of the Cotacachi sector collapses as well as their subsequent reconstruction patterns(Jomard et al, 2021;Almeida et al, 2023). Further east, the Alambi subsystem (A-fs) played a key role in the preferential growth patterns of the Imbabura volcano(Andrade et al, 2019).…”

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confidence: 99%

Blossoming of the Pleistocene volcanism in the Ecuadorian Andes: a review based on new and recent geochronological data

Santamaria,

Bablon,

Quidelleur

et al. 2024

Preprint

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The Ecuadorian arc is composed of an unusually high number of volcanoes organized as along-arc alignments and across-arc clusters, over a relatively small area. Although several geochronological studies were carried out in the past three decades, the eruptive history of the central zone of the arc remained poorly documented, preventing the analyses of volcanism initiation of the whole arc. In this study, we present new K-Ar ages obtained from this central area, referred as the Quito segment. These results were then included in an updated comprehensive geochronological database including about 250 ages, allowing us to describe, at the arc scale, the spatial and temporal development of Quaternary volcanic activity in Ecuador. About eighty Quaternary volcanoes are identified in the Ecuadorian Andes, amounting to 45 volcanic complexes with radiometric ages and/or identified as active or potentially active. The volcanic arc developed in three stages marked by increases in the total number of active volcanoes. During the oldest Plio-Early Pleistocene stage, the documented volcanic activity was mostly concentrated in the Eastern Cordillera of the Quito segment, with minor effusive eruptions in the southern Back-Arc. Since ~ 1.4 Ma, the activity spread to the surroundings of the Quito segment and new edifices also appeared in the Western Cordillera and the Inter-Andean Valley. Towards the end of this intermediate stage (i.e., ~ 800 ka), volcanism occurred in isolated areas to the north and south of the Inter-Andean Valley. Finally, the late and current stage was characterized by a remarkable increase in volcanic activity since ~ 600 ka. Approximately 50 volcanoes were active during this stage. The spatial distribution of the Ecuadorian arc volcanism seems to be guided by deep mechanisms and old crustal tectonic structures from the Western Cordillera, whereas the neotectonics seem to influence the development of stratovolcanoes. In addition, we note that the spatial and temporal evolution of volcanism highlights the influence of the Carnegie Ridge and the thermal regime anomaly of the young Nazca crust on the increase of volcanic activity in Ecuador.

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Interactions between active tectonics and gravitational deformation along the Billecocha fault system (Northern Ecuador): Insights from morphological and paleoseismological investigations

Cited by 6 publications

References 86 publications

Paleoseismology of a Major Crustal Seismogenic Source Near Mexico City: The Southern Border of the Acambay Graben

Paleoseismology of a Major Crustal Seismogenic Source Near Mexico City: The Southern Border of the Acambay Graben

Timing of Quaternary volcanism and its relationship with tectonics in the central segment of the Ecuadorian Andes

Blossoming of the Pleistocene volcanism in the Ecuadorian Andes: a review based on new and recent geochronological data

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