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

Dávila-Harris, Pablo; Branney, Michael J.; Storey, Michael; Taylor, Rex N.; Śliwiński, Jakub

doi:10.1016/j.jvolgeores.2023.107777

Cited by 6 publications

(4 citation statements)

References 89 publications

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“…The widespread exposure suggests that the deposit covered the entire region of Abona (Dávila-Harris et al, 2011). The Ab-VDA forms part of the Helecho Formation, which corresponds to the Lower Bandas del Sur Group (Dávila-Harris et al, 2023) and the Guajara Cycle (Cas et al, 2022).…”

Section: Abona Volcanic Debris Avalanche-edifice and Deposit Morphologymentioning

confidence: 99%

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

et al. 2023

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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 deposit is indurated making the detailed study of its sedimentology difficult, especially clast-size analysis. A novel method utilising structure from motion photogrammetry and photographic sampling was employed.Results: The universal cataclasis of the material and fluidal features suggest that the lack of a major competent material component allowed the mass to fragment and enabled fluidised granular flow behaviour. It is proposed that shear was periodically distributed throughout the body of the avalanche in chaotic temporary shear networks rearranging according to the instantaneous distribution of the mass. Stress and agitation were not temporally or spatially homogenous during propagation. This is also reflected in the unsystematic erosion of the substrate according to the variable basal shear accommodation.Discussion: It is proposed that lithological properties are potentially a determining factor for the propagation mechanisms, stress distribution, and consequently the evolution of a volcanic debris avalanche from the initial collapse to its emplacement. This study highlights the importance of dedicated field examinations of sedimentological, morphological, and structural features for providing constraints for models of volcanic debris avalanche dynamics and the factors dictating them. The novel methodology proposed has the potential of broadening the number of events that can be studied and enhancing the understanding of these complex and hazardous phenomena.

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Section: Abona Volcanic Debris Avalanche-edifice and Deposit Morphologymentioning

confidence: 99%

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

et al. 2023

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“…The Isle of Tenerife is the largest island and the "heart" of the Canary Islands Archipelago, as can be deduced from the volcano-geodynamic map depicting the various stages of the evolution of the volcanic islands with the age of formation decreasing from East to West (Figure 2) [12]. The largest island of the Archipelago is made up of three basement areas (shield stage), Roque del Conde (11.0 to 3.5 Ma), Teno (6.7 to 4.5 Ma), and Anaga Massifs (>6.5 to 3.3 Ma), with the younger Teide Volcano in the center of the rift triple junction (Figure 2) [58][59][60][61][62]). The Canary Island Archipelago is a marine hotspot area in front of the African continent [11,13,63,64].…”

Section: The Geological Setting Of the Isle Of Tenerife Spainmentioning

confidence: 99%

“…Tenerife features a triple junction with three rift arms, highlighted in the recent landscape by the Roque del Conde, Teno, and Anaga Massifs, each at the ends. The younger Teide Volcano is erected from the center of this triple junction and covers a lot of the older massifs with its lava deposits and pyroclastic sediments [59,60,62,215] (Figure 11). It is the NNE-and ENE-striking rift arms that are relevant for the evolution of the incipient stage of mineralization (Figures 3 and 11).…”

Section: Stage 1-the Initial Rifting Stagementioning

confidence: 99%

Marker Minerals in Volcanics and Xenoliths—An Approach to Categorize the Inferred Magmatic Rocks Underneath the Present-Day Volcanic Landscape of Tenerife, Spain (NW African Rare Mineral Province)

Dill,

Rüsenberg

2023

Minerals

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A mineralogical mapping (terrain analysis) based on micro-mounts has been performed in the Archipelago of the Canary Islands, Spain. The rare elements Be, F, Li, Nb, Ta, Zr, Hf, and rare earth elements (REE) were investigated on the largest island of the Canary Islands Archipelago, Tenerife, Spain. This study forms a contribution to the metallogenetic evolution of the offshore area of the NW African Rare Mineral Province. The finds made at Tenerife were correlated by means of minero-stratigraphy with the adjacent islands La Gomera, Gran Canaria and Fuerteventura, where typical critical element host rocks, e.g., carbonatites, are exposed. At Tenerife, these hidden rock types are only indicated by a wealth of 128 compositional first-order marker minerals hosting Be, F, Zr, Nb, Ta, Zr, Hf, Li, Cs, Sn, W, Ti and REE plus Y and another 106 structural second-order marker minerals describing the geodynamic and morpho-structural evolution of Tenerife (Mn, Fe, Pb, U, Th, As, Sb, V, S, B, Cu, Zn, Mo, Au). Based upon the quantitative micro-mineralogical mapping of lithoclasts and mineralogical xenoliths (foid-bearing monzodiorite/gabbro, (nepheline) syenite, phonolite trachyte) in volcanic and volcaniclastic rocks, hidden intrusive/subvolcanic bodies can be delineated that are associated with contact-metasomatic, zeolitic and argillic alteration zones, as well as potential ore zones. Two potential types of deposits are determined. These are pegmatite-syenites with minor carbonatites bound to a series of agpaitic intrusive rocks that are genetically interlocked with rift zones and associated with a hotspot along a passive continental margin. Towards the east, the carbonatite/alkali magmatite ratio reverses at Fuerteventura in favor of carbonatites, while at Gran Canaria and La Gomera, shallow hypogene/supergene mineral associations interpreted as a marginal facies to Tenerife occur and a new REE discovery in APS minerals has been made. There are seven mineralizing processes different from each other and representative of a peculiar metallogenic process (given in brackets): Protostage 1 (rifting), stages 2a to 2d (differentiation of syenite–pegmatite), stages 3 to 4b (contact-metasomatic/hydrothermal mineralization), stages 5a to 5b (hydrothermal remobilization and zeolitization), stage 6 (shallow hypogene-supergene transition and kaolinization), and stage 7 (auto-hydrothermal-topomineralic mineralization). The prerequisites to successfully take this holistic approach in economic geology are a low maturity of the landscapes in the target area, a Cenozoic age of endogenous and exogenous processes amenable to sedimentological, geomorphological, volcano-tectonic and quantitative mineralogical investigations. The volcanic island’s mineralogical mapping is not primarily designed as a proper pre-well-site study on the Isle of Tenerife, but considered a reference study area for minero-stratigraphic inter-island correlation (land–land) and land–sea when investigating the seabed and seamounts around volcanic archipelagos along the passive margin, as exemplified by the NW African Craton and its metallogenic province. This unconventional exploration technique should also be tested for hotspot- and rift-related volcanic islands elsewhere on the globe for mineral commodities different from the ones under study.

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“…recientemente estudiaron las fases eruptivas que alternaron de subplinianas a freatomagmáticas durante la construcción de un volcán maar-diatrema en Caldera del Rey (Islas Canarias, Tenerife), describiendo procesos que desembocaron en depósitos masivos similares a los aquí expuestos. Del mismo modo,Dávila-Harris et al (2023), documentaron la estratigrafía inferior del Cuaternario del sur de Tenerife, proporcionando nuevas perspectivas de la evolución explosiva de uno de los volcanes de islas oceánicas más grandes del planeta, definiendo, describiendo e interpretando en la secuencia, algunos depósitos de características afines. El proceso condujo a una fragmentación intensa del magma a mezcla de ceniza y vapor con el aire del ambiente.…”

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

Venegas Rodríguez,

Dávila Harris,

Yutsis

et al. 2024

Geofis Int

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La Joya de Los Contreras es una de cuatro estructuras freatomagmáticas que forman parte del Campo Volcánico Santo Domingo, un campo volcánico monogenético asociado a magmatismo intraplaca del Pleistoceno al norte del estado de San Luis Potosí (México), relacionado a fallamiento extensional y adelgazamiento cortical. Estudios previos incluyen geoquímica de lavas y xenolitos, pero no abundan en la evolución volcánica de la secuencia piroclástica. La Joya de los Contreras es un cráter volcánico excavado en calizas (Formación El Abra, Cretácico superior), de forma elíptica y dimensiones de 1,160 m de diámetro por 210 m de profundidad. Expone lavas máficas en la base (basanitas), un anillo de tobas muy bien preservado y expuesto, y también lavas máficas en la cima de la secuencia. Con el objeto de conocer los procesos magmáticos y freatomagmáticos que le dieron origen, se desarrolló un levantamiento estratigráfico y análisis de facies, petrografía, granulometría, componentes y geoquímica. La secuencia se compone de 1) Unidades pre-maar, lavas máficas, basanitas y aglomerados; 2) Unidades formadoras del maar, tobas conformando el anillo; y 3) Unidades post-maar, lavas coronando la secuencia. Se fechó una de estas últimas en 447 ± 11 ka (edad 40Ar/39Ar en roca total). La historia volcano-estratigráfica resulto en la reconstrucción de 5 fases eruptivas que van de efusiva-estromboliana pre-maar a freatomagmática explosiva, con variaciones en proporciones de interacción agua-magma y cerrando estromboliana-efusiva post-maar. Aunque no hay evidencia directa de una diatrema a profundidad, se infiere su existencia en base a diversos criterios geomorfológicos, tales como el alto volumen de material calcáreo lítico en el anillo de tobas (excavación y relleno – reciclaje), la relación de aspecto del cráter y su relleno.

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

Cited by 6 publications

References 89 publications

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

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

Marker Minerals in Volcanics and Xenoliths—An Approach to Categorize the Inferred Magmatic Rocks Underneath the Present-Day Volcanic Landscape of Tenerife, Spain (NW African Rare Mineral Province)

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

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