Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Harri Geiger"'
Autor:
Guillem Gisbert, Valentin R. Troll, James M. D. Day, Harri Geiger, Francisco J. Perez-Torrado, Meritxell Aulinas, Frances M. Deegan, Helena Albert, Juan Carlos Carracedo
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-6 (2023)
Externí odkaz:
https://doaj.org/article/121c87619ede4d078004187e80cf9d71
Autor:
Herlan Darmawan, Valentin R. Troll, Thomas R. Walter, Frances M. Deegan, Harri Geiger, Michael J. Heap, Nadhirah Seraphine, Chris Harris, Hanik Humaida, Daniel Müller
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022)
Abstract Catastrophic lava dome collapse is considered an unpredictable volcanic hazard because the physical properties, stress conditions, and internal structure of lava domes are not well understood and can change rapidly through time. To explain t
Externí odkaz:
https://doaj.org/article/ceade90a12684fffa1ad017c5271479c
Autor:
James M. D. Day, Harri Geiger, Valentin R. Troll, Francisco J. Perez-Torrado, Meritxell Aulinas, Guillem Gisbert, Juan Carlos Carracedo
Publikováno v:
Earth Science, Systems and Society, Vol 2 (2022)
Incandescent pyroclasts of more than 64 mm in diameter erupted from active volcanoes are known as bombs and pose a significant hazard to life and infrastructure. Volcanic ballistic projectile hazard assessment normally considers fall as the main tran
Externí odkaz:
https://doaj.org/article/fc79345290274e71948418c3b2bdc1a7
Autor:
Frances M. Deegan, Martin J. Whitehouse, Valentin R. Troll, Harri Geiger, Heejin Jeon, Petrus le Roux, Chris Harris, Marcel van Helden, Osvaldo González-Maurel
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)
Subduction zone volcanoes are underlain by extensive magma plumbing systems, which can obscure original mantle source signals. Here, the authors show that intra-crystal oxygen isotope analysis of clinopyroxenes from the Sunda arc (Indonesia) reveal t
Externí odkaz:
https://doaj.org/article/362c3e1fcf3f4320aa920c69741483a7
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
https://doi.org/10.5194/egusphere-egu23-6518
Autor:
Ioana-Bogdana Radu, Henrik Skogby, Valentin R. Troll, Frances M. Deegan, Harri Geiger, Daniel Müller, Thor Thordarson
The magmatic water content plays an important role in the evolution and explosivity of volcanic eruptions, due to the influence of water on magma density, viscosity, crystallization and melting temperatures. A reliable method for determining the pre-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93162692e2b8046244d67491dae38aac
https://doi.org/10.5194/egusphere-egu23-16815
https://doi.org/10.5194/egusphere-egu23-16815
Autor:
Ioana-Bogdana Radu, Henrik Skogby, Valentin R. Troll, Frances M. Deegan, Harri Geiger, Daniel Müller, Thor Thordarson
Publikováno v:
Bulletin of Volcanology. 85
Water content plays a significant role in magma genesis, ascent rate, and, ultimately, in the style and intensity of volcanic eruptions, due to its control on the density, viscosity and melting behaviour of silicate melts. A reliable method for deter
Autor:
Kyle Dayton, Esteban Gazel, Penny Wieser, Valentin R. Troll, Juan Carlos Carracedo, Hector La Madrid, Diana C. Roman, Jamison Ward, Meritxell Aulinas, Harri Geiger, Frances M. Deegan, Guillem Gisbert, Francisco J. Perez-Torrado
The 2021 La Palma eruption provided an unpreceded opportunity to test the relationship between earthquake hypocenters and the location of magma reservoirs. We performed density measurements on CO 2 -rich fluid inclusions (FIs) hosted in olivine cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1da071eaf9ba5fe06e5ebbbe9ca8f1b
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-499939
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-499939
Autor:
Frances M Deegan, Jean H Bédard, Stephen E Grasby, Keith Dewing, Harri Geiger, Valeria Misiti, Manfredo Capriolo, Sara Callegaro, Henrik H Svensen, Chris Yakymchuk, László E Aradi, Carmela Freda, Valentin R Troll
Publikováno v:
Journal of Petrology. 63
Large igneous provinces (LIPs) whose magma plumbing systems intersect sedimentary basins are linked to upheavals of Earth’s carbon and sulfur cycles and thus climate and life history. However, the underlying mechanistic links between these phenomen
Autor:
Chris Harris, Petrus le Roux, Heejin Jeon, Martin J. Whitehouse, Harri Geiger, Marcel van Helden, Frances M. Deegan, Valentin R. Troll, Osvaldo González-Maurel
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)
Nature Communications
Deegan, F M, Whitehouse, M J, Troll, V R, Geiger, H, Jeon, H, le Roux, P, Harris, C, van Helden, M & González-Maurel, O 2021, ' Sunda arc mantle source δ18O value revealed by intracrystal isotope analysis ', Nature Communications, vol. 12, 3930, pp. 1-10 . https://doi.org/10.1038/s41467-021-24143-3
Nature Communications, 12:3930, 1-10. Nature Publishing Group
Nature Communications
Deegan, F M, Whitehouse, M J, Troll, V R, Geiger, H, Jeon, H, le Roux, P, Harris, C, van Helden, M & González-Maurel, O 2021, ' Sunda arc mantle source δ18O value revealed by intracrystal isotope analysis ', Nature Communications, vol. 12, 3930, pp. 1-10 . https://doi.org/10.1038/s41467-021-24143-3
Nature Communications, 12:3930, 1-10. Nature Publishing Group
Magma plumbing systems underlying subduction zone volcanoes extend from the mantle through the overlying crust and facilitate protracted fractional crystallisation, assimilation, and mixing, which frequently obscures a clear view of mantle source com