Hydrothermal fluid flow triggered by an earthquake in Iceland
Type | Article | ||||||||||||
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Date | 2022-03 | ||||||||||||
Language | English | ||||||||||||
Author(s) | Geoffroy Laurent1, Dorbath Catherine2, Ágústsson Kristján3, Kristjánsdóttir Sigríður3, Flóvenz Ólafur G.3, Doubre Cécile2, Gudmundsson Ólafur4, Barreyre Thibaut5, Bazin Sara1, Franco Aurore1 | ||||||||||||
Affiliation(s) | 1 : IUEM, CNRS, University of Western Britany, Brest, France 2 : EOST, CNRS, Université de Strasbourg, Strasbourg, France 3 : Iceland GeoSurvey, Reykjavik, Iceland 4 : Uppsala University, Uppsala, Sweden 5 : Centre of Deep-Sea Research, University of Bergen, Bergen, Norway |
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Source | Communications Earth & Environment (2662-4435) (Springer Science and Business Media LLC), 2022-03 , Vol. 3 , N. 1 , P. 54 (9p.) | ||||||||||||
DOI | 10.1038/s43247-022-00382-0 | ||||||||||||
WOS© Times Cited | 1 | ||||||||||||
Abstract | Microearthquake hypocenters were analyzed in the Krýsuvík geothermal area in SW-Iceland with data taken from two consecutive passive seismic surveys, 2005 and 2009. Five years prior to the 2005 survey, this area was struck by an earthquake initiating a major top-to-bottom fluid migration in the upper crust. We observe from our surveys a complex bottom-to-top migration of seismicity with time following this fluid penetration, suggesting the migration of a pore pressure front controlled by the upper-crust fracture system. We interpret these data as the time and space development of high-temperature hydrothermal cells from a deep upper crustal fluid reservoir in the supercritical field. These results provide an insight into the coupling mechanisms between active tectonics and fluid flow in upper-crustal extensional systems with high thermal flux. |
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