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Papers by Pablo Dávila-Harris

Research paper thumbnail of Evolución volcánica del maar Joya de Los Contreras, San Luis Potosí México, a partir de estratigrafía y análisis de facies

Geofísica internacional, Jun 21, 2024

Research paper thumbnail of Petrographic and Geochemical Trends Within Volcanic Rocks of the Sierra Madre Occidental Silicic Large Igneous Province, Chihuahua-Durango Border, Northern Mexico: Insights Into Temporal Changes in Petrogenesis

112th Annual GSA Cordilleran Section Meeting, 2016

Research paper thumbnail of Hydrovolcanic evolution of the Joya Prieta maar, San Luis Potosí, northeast Mexico

Research paper thumbnail of The structural architecture of the Los Humeros volcanic complex and geothermal field, Trans-Mexican Volcanic Belt, Central Mexico

EGU General Assembly Conference Abstracts, May 1, 2014

Research paper thumbnail of El complejo volcánico de Ahualulco: geoquímica y evolución temporal del vulcanismo félsico del Oligoceno, en el oriente de la Mesa Central, San Luis Potosí, México

Revista Mexicana de Ciencias Geológicas

El complejo volcánico de Ahualulco (CVA), en la región meridional de la Mesa Central de México, c... more El complejo volcánico de Ahualulco (CVA), en la región meridional de la Mesa Central de México, consta de un conjunto de rocas volcánicas cenozoicas que incluye andesitas emplazadas en el Eoceno medio, seguidas de lavas dacíticas y riolíticas, al igual que secuencias piroclásticas félsicas emitidas durante el Oligoceno, algunas de las cuales contienen granate. En este trabajo se ha encontrado que, al menos, un segundo evento andesítico (andesita Petronilas) ocurrió en ese lapso, y que estuvo ligado a la génesis de la ignimbrita Cortes (de composición riolítica), conformando así un volcanismo bimodal “atípico” evidenciado por las relaciones de campo, mineralogía, correlación de los elementos incompatibles Th y Nb y los patrones de las tierras raras. Adicionalmente, se obtuvieron nuevas edades de cristalización de zircón por el método U-Pb para la Riodacita Zapatero (31.7 Ma), la Riolita Los Cuervos (30.8 Ma), la riolita granatífera El Arenal (31.4 Ma) y el pórfido riolítico El Negro ...

Research paper thumbnail of Double Dating and Oxygen Isotope Analysis of Silicic Lavas and Ignimbrites from the Sierra Madre Occidental Large Igneous Province (Mexico): Insights Into the Sources and Timescales of Magma Generation in an Arc Flare-Up

Geological Society of America Abstracts with Programs, 2017

Research paper thumbnail of The Stratigraphic Record of Syn- and Post-Volcanic Extension Adjacent to the Sierra Madre Occidental Silicic Large Igneous Province, Northern Mexico

Research paper thumbnail of A New Sample Transect through the Sierra Madre Occidental Silicic Large Igneous Province in Southern Chihuahua State, Mexico: First Stratigraphic, Petrologic, and Geochemical Results

Research paper thumbnail of U-PB AND 40AR/39AR Geochronology of Rhyolitic Tuffs and Lavas of the Sierra Madre Occidental Silicic Large Igneous Province, Chihuahua and Durango Border Region, Northern Mexico

Research paper thumbnail of The upper Pleistocene (1.8–0.7 Ma) explosive eruptive history of Las Cañadas, ocean-island volcano, Tenerife

Journal of Volcanology and Geothermal Research

Research paper thumbnail of Distributed stress fluidisation: Insights into the propagation mechanisms of the Abona volcanic debris avalanche (Tenerife) through a novel method for indurated deposit sedimentological analysis

Frontiers in Earth Science

Introduction: Volcanic debris avalanches mobilise large volumes and achieve long runouts with hig... more Introduction: Volcanic debris avalanches mobilise large volumes and achieve long runouts with high destructive potential. However, the propagation processes that generate them are not currently explained by theoretical or numerical models, which are unable to represent deposit observations. Evaluation of the dynamics represented in deposits is therefore vital for constraining su ch models. The Abona volcanic debris avalanche deposit is located on the southern flank of the island of Tenerife, Spain. The deposit exhibits universal microfracturing and cataclasis. Fluidal features such as fluidal mixing of lithological units and diffuse boundaries, and mixed matrix are observed throughout the deposit.Methods: Field description including sedimentology and facies identification and the evaluation of their distribution have allowed the generation of a new conceptual model for the propagation dynamics of this volcanic debris avalanche, and potentially others with similar properties. The dep...

Research paper thumbnail of The Explosive Volcanic History of Ilopango Caldera, El Salvador

Volcanic and Magmatic Studies Group Conference 2020The Ilopango caldera (IC) is a large active vo... more Volcanic and Magmatic Studies Group Conference 2020The Ilopango caldera (IC) is a large active volcano located along the El Salvador Volcanic Arc. Its magmatism is associated to the subduction of the Cocos plate under the Caribbean plate. Despite the surrounding regions being blanketed in thick and widespread pyroclastic deposits, little was known about the number of large eruptions produced by IC, their magnitude and their age. Here we present the results from field mapping, stratigraphic correlation and geochronological analyses, which provide insights into the magnitude and tempo of large explosive eruptions from IC. The results achieved during this investigation are key for future volcanic hazard assessment for the 3 million inhabitants living in the San Salvador Metropolitan area, which is the most populated city in Central America. Based on stratigraphic correlations, geochronologic constraints (40Ar/39Ar and U-Th-Pb ages) and regional tectonic deformation, the complete pyroclastic sequence of IC has been divided into three formations [1]: the Comalapa (1.78 ¿ 1.34 Ma), Altavista (918 - 257 ka) and Tierras Blancas (<57 ka). Each eruption deposit identified was dated by techniques to reconstruct the volcanic history of IC. At least, IC has erupted explosively 13 times since its formation at 1.78 Ma ago. These high number of large eruptions from this volcano-tectonic caldera has been controlled by the El Salvador Fault Zone (ESFZ) [2]. The depth and the high slip-rate of the ESFZ structures assist magma ascent of large volumes of melt, and their eruption produces periodic caldera collapses. The AD 6th century Tierra Blanca Joven (TBJ) was the last explosive eruption of IC, and occurred whilst Mayans populated the region. The TBJ erupted ~30 km3 Dense Rock Equivalent (DRE) of magma [3], and dispersed volcanic ash over Honduras, Guatemala, Nicaragua and the Pacific Ocean. However, the TBJ was significantly smaller than the first eruptions from IC. For example, the pyroclastic density currents (PDC) of the Olocuilta ignimbrite (OI), a caldera forming event at 1.78 Ma, which covers an area of ~3000 km2 with thick pyroclastic density currents (PDC) deposits. Based on the thickness of the deposits of OI (up to 120 m), it is possible that it may have been a supereruption with an erupted volume of ~350 km3 DRE of magma [2]

Research paper thumbnail of Dynamics of a chemically pulsing mantle plume

Earth and Planetary Science Letters, 2020

Research paper thumbnail of Olocuilta Ignimbrite: The first major eruption of Ilopango caldera, El Salvador

Research paper thumbnail of The structural architecture of the Los Humeros volcanic complex and geothermal field

Journal of Volcanology and Geothermal Research, 2019

Research paper thumbnail of Assembly and Development of Large Active Calderas Hosting Geothermal Systems: Insights from Los Humeros Volcanic Complex (Mexico)

Research paper thumbnail of Petrogenesis of voluminous silicic magmas in the Sierra Madre Occidental large igneous province, Mexican Cordillera: Insights from zircon and Hf-O isotopes

Geosphere, 2022

Combined Hf-O isotopic analyses of zircons from tuffs and lavas within the Sierra Madre Occidenta... more Combined Hf-O isotopic analyses of zircons from tuffs and lavas within the Sierra Madre Occidental (SMO) silicic large igneous province are probes of petrogenetic processes in the lower and upper crust. Existing petrogenetic and tectonomagmatic models diverge, having either emphasized significant crustal reworking of hydrated continental lithosphere in an arc above the retreating Farallon slab or significant input of juvenile mantle melts through a slab window into an actively stretching continental lithosphere. New isotopic data are remarkably uniform within and between erupted units across the spatial and temporal extent of the SMO, consistent with homogeneous melt production and evolution. Isotopic values are consistent with enriched mantle magmas (80%) that assimilated Proterozoic paragneisses (~20%) from the lower crust. 18Ozircon values are consistent with fractionation of mafic magma and not with assimilation of hydrothermally altered upper crust, suggesting that the silicic ...

Research paper thumbnail of The Ilopango caldera complex, El Salvador: Stratigraphic revision of the complete eruptive sequence and recurrence of large explosive eruptions

Journal of Volcanology and Geothermal Research, 2019

Research paper thumbnail of The use of biotite trace element compositions for fingerprinting magma batches at Las Cañadas volcano, Tenerife

Bulletin of Volcanology, 2016

Accurate identification of individual volcanic events in the field is crucial for constraining er... more Accurate identification of individual volcanic events in the field is crucial for constraining eruption volumes and calculating recurrence intervals between eruptive episodes. Due to complexities of pyroclastic transport and deposition and intra-unit textural variability, such identification can be challenging. We present a novel method for fingerprinting ignimbrites via trace element chemistry (V, Co, Nb) in biotite by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Using samples from the alkaline magmatic series of Tenerife, we are able to demonstrate (1) clustering of previously characterized units into distinct, homogeneous groups based on V, Co, and Nb concentrations in biotite, despite the presence of extreme variation and zonation in other trace elements (Ba, Sr, Rb) that indicate complex petrogenetic processes, and (2) biotite compositions are similar throughout a deposit and relatively independent of stratigraphic height or juvenile clast texture (crystal-rich vs crystal-poor). Our results show that trace elements in biotite can be used to fingerprint eruptions and correlate geographically separated volcanic deposits, including those preserved in offshore turbidite records.

Research paper thumbnail of Eruption of Shallow Crystal Cumulates during Explosive Phonolitic Eruptions on Tenerife, Canary Islands

Journal of Petrology, 2015

Research paper thumbnail of Evolución volcánica del maar Joya de Los Contreras, San Luis Potosí México, a partir de estratigrafía y análisis de facies

Geofísica internacional, Jun 21, 2024

Research paper thumbnail of Petrographic and Geochemical Trends Within Volcanic Rocks of the Sierra Madre Occidental Silicic Large Igneous Province, Chihuahua-Durango Border, Northern Mexico: Insights Into Temporal Changes in Petrogenesis

112th Annual GSA Cordilleran Section Meeting, 2016

Research paper thumbnail of Hydrovolcanic evolution of the Joya Prieta maar, San Luis Potosí, northeast Mexico

Research paper thumbnail of The structural architecture of the Los Humeros volcanic complex and geothermal field, Trans-Mexican Volcanic Belt, Central Mexico

EGU General Assembly Conference Abstracts, May 1, 2014

Research paper thumbnail of El complejo volcánico de Ahualulco: geoquímica y evolución temporal del vulcanismo félsico del Oligoceno, en el oriente de la Mesa Central, San Luis Potosí, México

Revista Mexicana de Ciencias Geológicas

El complejo volcánico de Ahualulco (CVA), en la región meridional de la Mesa Central de México, c... more El complejo volcánico de Ahualulco (CVA), en la región meridional de la Mesa Central de México, consta de un conjunto de rocas volcánicas cenozoicas que incluye andesitas emplazadas en el Eoceno medio, seguidas de lavas dacíticas y riolíticas, al igual que secuencias piroclásticas félsicas emitidas durante el Oligoceno, algunas de las cuales contienen granate. En este trabajo se ha encontrado que, al menos, un segundo evento andesítico (andesita Petronilas) ocurrió en ese lapso, y que estuvo ligado a la génesis de la ignimbrita Cortes (de composición riolítica), conformando así un volcanismo bimodal “atípico” evidenciado por las relaciones de campo, mineralogía, correlación de los elementos incompatibles Th y Nb y los patrones de las tierras raras. Adicionalmente, se obtuvieron nuevas edades de cristalización de zircón por el método U-Pb para la Riodacita Zapatero (31.7 Ma), la Riolita Los Cuervos (30.8 Ma), la riolita granatífera El Arenal (31.4 Ma) y el pórfido riolítico El Negro ...

Research paper thumbnail of Double Dating and Oxygen Isotope Analysis of Silicic Lavas and Ignimbrites from the Sierra Madre Occidental Large Igneous Province (Mexico): Insights Into the Sources and Timescales of Magma Generation in an Arc Flare-Up

Geological Society of America Abstracts with Programs, 2017

Research paper thumbnail of The Stratigraphic Record of Syn- and Post-Volcanic Extension Adjacent to the Sierra Madre Occidental Silicic Large Igneous Province, Northern Mexico

Research paper thumbnail of A New Sample Transect through the Sierra Madre Occidental Silicic Large Igneous Province in Southern Chihuahua State, Mexico: First Stratigraphic, Petrologic, and Geochemical Results

Research paper thumbnail of U-PB AND 40AR/39AR Geochronology of Rhyolitic Tuffs and Lavas of the Sierra Madre Occidental Silicic Large Igneous Province, Chihuahua and Durango Border Region, Northern Mexico

Research paper thumbnail of The upper Pleistocene (1.8–0.7 Ma) explosive eruptive history of Las Cañadas, ocean-island volcano, Tenerife

Journal of Volcanology and Geothermal Research

Research paper thumbnail of Distributed stress fluidisation: Insights into the propagation mechanisms of the Abona volcanic debris avalanche (Tenerife) through a novel method for indurated deposit sedimentological analysis

Frontiers in Earth Science

Introduction: Volcanic debris avalanches mobilise large volumes and achieve long runouts with hig... more Introduction: Volcanic debris avalanches mobilise large volumes and achieve long runouts with high destructive potential. However, the propagation processes that generate them are not currently explained by theoretical or numerical models, which are unable to represent deposit observations. Evaluation of the dynamics represented in deposits is therefore vital for constraining su ch models. The Abona volcanic debris avalanche deposit is located on the southern flank of the island of Tenerife, Spain. The deposit exhibits universal microfracturing and cataclasis. Fluidal features such as fluidal mixing of lithological units and diffuse boundaries, and mixed matrix are observed throughout the deposit.Methods: Field description including sedimentology and facies identification and the evaluation of their distribution have allowed the generation of a new conceptual model for the propagation dynamics of this volcanic debris avalanche, and potentially others with similar properties. The dep...

Research paper thumbnail of The Explosive Volcanic History of Ilopango Caldera, El Salvador

Volcanic and Magmatic Studies Group Conference 2020The Ilopango caldera (IC) is a large active vo... more Volcanic and Magmatic Studies Group Conference 2020The Ilopango caldera (IC) is a large active volcano located along the El Salvador Volcanic Arc. Its magmatism is associated to the subduction of the Cocos plate under the Caribbean plate. Despite the surrounding regions being blanketed in thick and widespread pyroclastic deposits, little was known about the number of large eruptions produced by IC, their magnitude and their age. Here we present the results from field mapping, stratigraphic correlation and geochronological analyses, which provide insights into the magnitude and tempo of large explosive eruptions from IC. The results achieved during this investigation are key for future volcanic hazard assessment for the 3 million inhabitants living in the San Salvador Metropolitan area, which is the most populated city in Central America. Based on stratigraphic correlations, geochronologic constraints (40Ar/39Ar and U-Th-Pb ages) and regional tectonic deformation, the complete pyroclastic sequence of IC has been divided into three formations [1]: the Comalapa (1.78 ¿ 1.34 Ma), Altavista (918 - 257 ka) and Tierras Blancas (<57 ka). Each eruption deposit identified was dated by techniques to reconstruct the volcanic history of IC. At least, IC has erupted explosively 13 times since its formation at 1.78 Ma ago. These high number of large eruptions from this volcano-tectonic caldera has been controlled by the El Salvador Fault Zone (ESFZ) [2]. The depth and the high slip-rate of the ESFZ structures assist magma ascent of large volumes of melt, and their eruption produces periodic caldera collapses. The AD 6th century Tierra Blanca Joven (TBJ) was the last explosive eruption of IC, and occurred whilst Mayans populated the region. The TBJ erupted ~30 km3 Dense Rock Equivalent (DRE) of magma [3], and dispersed volcanic ash over Honduras, Guatemala, Nicaragua and the Pacific Ocean. However, the TBJ was significantly smaller than the first eruptions from IC. For example, the pyroclastic density currents (PDC) of the Olocuilta ignimbrite (OI), a caldera forming event at 1.78 Ma, which covers an area of ~3000 km2 with thick pyroclastic density currents (PDC) deposits. Based on the thickness of the deposits of OI (up to 120 m), it is possible that it may have been a supereruption with an erupted volume of ~350 km3 DRE of magma [2]

Research paper thumbnail of Dynamics of a chemically pulsing mantle plume

Earth and Planetary Science Letters, 2020

Research paper thumbnail of Olocuilta Ignimbrite: The first major eruption of Ilopango caldera, El Salvador

Research paper thumbnail of The structural architecture of the Los Humeros volcanic complex and geothermal field

Journal of Volcanology and Geothermal Research, 2019

Research paper thumbnail of Assembly and Development of Large Active Calderas Hosting Geothermal Systems: Insights from Los Humeros Volcanic Complex (Mexico)

Research paper thumbnail of Petrogenesis of voluminous silicic magmas in the Sierra Madre Occidental large igneous province, Mexican Cordillera: Insights from zircon and Hf-O isotopes

Geosphere, 2022

Combined Hf-O isotopic analyses of zircons from tuffs and lavas within the Sierra Madre Occidenta... more Combined Hf-O isotopic analyses of zircons from tuffs and lavas within the Sierra Madre Occidental (SMO) silicic large igneous province are probes of petrogenetic processes in the lower and upper crust. Existing petrogenetic and tectonomagmatic models diverge, having either emphasized significant crustal reworking of hydrated continental lithosphere in an arc above the retreating Farallon slab or significant input of juvenile mantle melts through a slab window into an actively stretching continental lithosphere. New isotopic data are remarkably uniform within and between erupted units across the spatial and temporal extent of the SMO, consistent with homogeneous melt production and evolution. Isotopic values are consistent with enriched mantle magmas (80%) that assimilated Proterozoic paragneisses (~20%) from the lower crust. 18Ozircon values are consistent with fractionation of mafic magma and not with assimilation of hydrothermally altered upper crust, suggesting that the silicic ...

Research paper thumbnail of The Ilopango caldera complex, El Salvador: Stratigraphic revision of the complete eruptive sequence and recurrence of large explosive eruptions

Journal of Volcanology and Geothermal Research, 2019

Research paper thumbnail of The use of biotite trace element compositions for fingerprinting magma batches at Las Cañadas volcano, Tenerife

Bulletin of Volcanology, 2016

Accurate identification of individual volcanic events in the field is crucial for constraining er... more Accurate identification of individual volcanic events in the field is crucial for constraining eruption volumes and calculating recurrence intervals between eruptive episodes. Due to complexities of pyroclastic transport and deposition and intra-unit textural variability, such identification can be challenging. We present a novel method for fingerprinting ignimbrites via trace element chemistry (V, Co, Nb) in biotite by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Using samples from the alkaline magmatic series of Tenerife, we are able to demonstrate (1) clustering of previously characterized units into distinct, homogeneous groups based on V, Co, and Nb concentrations in biotite, despite the presence of extreme variation and zonation in other trace elements (Ba, Sr, Rb) that indicate complex petrogenetic processes, and (2) biotite compositions are similar throughout a deposit and relatively independent of stratigraphic height or juvenile clast texture (crystal-rich vs crystal-poor). Our results show that trace elements in biotite can be used to fingerprint eruptions and correlate geographically separated volcanic deposits, including those preserved in offshore turbidite records.

Research paper thumbnail of Eruption of Shallow Crystal Cumulates during Explosive Phonolitic Eruptions on Tenerife, Canary Islands

Journal of Petrology, 2015