Výsledky vyhledávání - "Valentin Troll"

Oxygen isotopes in 2021 La Palma lavas reveal pre-eruptive magma storage and primitive mantle values

Autor: Valentin Troll, Frances Deegan, Ilya Bindeman, Chris Harris, James Day, Meritxell Aulinas, Harri Geiger, Francisco Perez Torrado, Juan Carlos Carracedo, Vicente Soler, Guillem Pinto, Helena Albert

Magma production, storage, and migration beneath volcanic ocean islands has been a matter of controversy and a multitude of methods are currently used to unravel magma evolution, storage and migration processes. Here we report on a temporal sequence

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ba0d597dbdfce7df96cff0c18157801
https://doi.org/10.5194/egusphere-egu23-6518

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Drone and field-based monitoring of the degassing and alteration structures of the La Fossa fumarole field (Vulcano Island), before and during the 2021 volcanic crisis

Autor: Daniel Müller, Thomas R. Walter, Valentin Troll, Jessica A. Stammeier, Andreas Karlsson, Erica De Paolo, Antonino Fabio Pisciotta

Fumarole fields and hydrothermal alteration are prominent signs of volcanic degassing at many volcanoes, and their monitoring is an essential part of the assessment of volcanic unrest. Yet, our knowledge about the detailed structure of fumarole field

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7447ea817cb7be2be26f8c3bea8d4117
https://doi.org/10.5194/egusphere-egu23-12942

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Characterising ice-magma interactions during a shallow subglacial fissure eruption: northern Laki, Iceland, a case study

Autor: Catherine (Kate) Gallagher, Magnús Tumi Gudmundsson, Thorvaldur Thordarson, Bruce Houghton, Birgir Óskarsson, Robert Askew, Rosie Cole, William Moreland, Valentin Troll, Guðrún Þorgerður Larsen

Iceland has the largest variety of subglacially formed volcanic edifices worldwide, given the extensive glacial cover during the Pleistocene and its frequent volcanic activity. As substantial parts of the volcanic zones are presently ice-covered, eru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29f68afa3bb5a98bec4c29b4f8a4cb96
https://doi.org/10.5194/egusphere-egu22-12210

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Towards a global spectral-geomechanical database of volcanic rocks using VNIR-SWIR spectroscopy

Autor: Gabor Kereszturi, Michael Heap, Lauren Schaefer, Herlan Darmawan, Frances Deegan, Ben Kennedy, Jean-Christophe Komorowski, Marina Rosas-Carbajal, Amy Ryan, Valentin Troll, Marlène Villeneuve, Thomas Walter

Volcanoes are subject to intense fluid circulation, altering primary rock properties. The rock alteration can be due to “cold” water-driven weathering or “hot” hydrothermal fluids. Such alteration is facilitated by the efficient circulation o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::42e6f33c5e32b6ed34ad6ec7aa6d9a59
https://doi.org/10.5194/egusphere-egu22-2087

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The tensile strength of volcanic rocks

The tensile strength of volcanic rock exerts control over several key volcanic processes, including fragmentation, magma chamber rupture, and dyke propagation. However, and despite this importance, values of tensile strength for volcanic rocks are re

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b3669e4f245cd71621d401af5913960
https://doi.org/10.5194/egusphere-egu22-992

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African sand storms, blood rain, and continental mineral delivery to the Canary Islands

Autor: Valentin Troll, Juan Carlos Carracedo, Hans Gilg

The origin of volcanism in the Canary Islands has been a matter of controversy for decades. Discussions have hinged on whether the Canaries owe their origin to seafloor fractures associated with the Atlas Mountain range or to an underlying plume or h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52b3c49578e6aa4989da55e45f634380
https://doi.org/10.31223/x5jd0h

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Iron Isotopes Constrain Sub-Seafloor Hydrothermal Processes at the TAG Active Sulfide Mound, 26°N Mid-Atlantic Ridge

Autor: Fredrik Sahlström, Valentin Troll, Sabina Strmić Palinkaš, Ellen Kooijman, Xin-Yuan Zheng

Sub-seafloor hydrothermal processes along volcanically active plate boundaries are integral to the formation of seafloor massive sulfide (SMS) deposits and to oceanic Fe cycling, yet their nature is poorly understood. Here we apply Fe isotope analysi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9e47f05b5a17f1f3ff819127c7b4fcd7
https://doi.org/10.21203/rs.3.rs-1338313/v1

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The 2021 eruption of the Cumbre Vieja Volcanic Ridge on La Palma, Canary Islands

Autor: Juan Carlos Carracedo, Valentin Troll, James Day, Meritxell Aulinas Junca, Vicente Soler, Frances Deegan, Francisco José Pérez Torrado, Guillem Gisbert Pinto, Esteban Gazel, Alejandro Rodríguez González, Helena Albert Minguez

Almost exactly half a century after the eruption of the Teneguía Volcano on La Palma (26 October to 28 November 1971), a new eruption occurred on the island and lasted for 85 days from 19 September until 13 December 2021. This new eruption opened a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4eb6a9a2860b6e6681df2810e9fd8e3d
https://doi.org/10.31223/x5d06d

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