Conference
Geological monitoring of the lava flow on the shelf and slope of La Palma Island during de Tajogaite eruption, 2021
| العنوان: | Geological monitoring of the lava flow on the shelf and slope of La Palma Island during de Tajogaite eruption, 2021 |
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| المؤلفون: | Vázquez, Juan Tomás, Gómez-Ballesteros, María, Sánchez-Guillamón, Olga, Lozano Rodríguez, José Antonio, Casillas, Ramón, Brenes, Álex, García, Marga, Arrese-González, Beatriz, Palomino, Desirée, González-Vega, Alba, Martín-Diaz, Juan Pablo, Presas-Navarro, Carmen, Fraile-Nuez, Eugenio |
| سنة النشر: | 2023 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| الوصف: | The Tajogaite volcanic eruption took place on the southwestern flank of La Palma Island between September 19th and December 13th, 2021. An oceanographic study of the area was carried out to control the effects of the submarine lava flow on the seabed, developed in three-time windows during the eruption. Changes in morphology, extent, and thickness, have been studied by combining pre and successive post-bathymetric datasets, with 1m of spatial resolution, using an MB710 multibeam echosounder. To characterize the lava flow facies and different substrate types it has been used an ROV-Liropus 2000. The first bathymetric survey was carried out in the most probable arrival zone of lava flow to the sea to establish the pre-eruption characteristics of the insular shelf and slope where several gullies and their head-scarps were located. On September 28th, the lava flow arrived at the ocean forming two lava deltas: the northern and smaller one located to the south of the Tazacorte harbor, and the southern and main one attached to the north side of the lava delta generated during the 1949¿s eruption. The new volcanic materials have been identified at least to a depth of 360 m and approximately 1.2 km from the initial shoreline, occupying an estimated submarine area of 35 ha. The northern lava delta has been emplaced on the inner shelf but in the southern one, the subaerial part reaches the old shelf edge where they have rested on a rocky platform and the submarine lava flow has been channeled into shelf depressions and submarine gullies that intersect the shelf border and the upper slope, totally transforming the relief. Lava flows advanced along the seabed both as ¿aa¿ and block flows in the proximal area, also forming megapillows of different sizes on the upper slope. The monitoring of this eruption allowed studying, in real-time, the arrival of a lava flow to the sea and the associated modification of the coast and seabed. Results provide additional information on the development of the eruptive episode on La Palma ... |
| نوع الوثيقة: | conference object |
| اللغة: | unknown |
| Relation: | Sí; http://hdl.handle.net/10261/347466 |
| الاتاحة: | http://hdl.handle.net/10261/347466 |
| Rights: | none |
| رقم الانضمام: | edsbas.858BFA66 |
| قاعدة البيانات: | BASE |
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