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Changes in Diffuse Degassing From the Summit Crater of Teide Volcano (Tenerife, Canary Islands) Prior to the 2016 Tenerife Long‐Period Seismic Swarm
Author(s) -
Padrón Eleazar,
Pérez Nemesio M.,
Hernández Pedro A.,
Melián Gladys,
AsensioRamos María,
D'Auria Luca,
Rodríguez Fátima,
Alonso Mar,
Amonte Cecilia,
Padilla Germán D.,
Barrancos José,
Calvo David,
Coldwell Beverley,
Pankhurst Matthew J.
Publication year - 2021
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.983
H-Index - 232
eISSN - 2169-9356
pISSN - 2169-9313
DOI - 10.1029/2020jb020318
Subject(s) - impact crater , hydrothermal circulation , volcano , geology , magma , geochemistry , convective mixing , mixing (physics) , convection , seismology , meteorology , physics , astronomy , quantum mechanics
Abstract Ground surface diffuse degassing and heat flow surveys were conducted at the summit crater of Teide volcano (Tenerife) on a roughly monthly basis from 2013 to 2017 to evaluate their degree of temporal variation and compare with seismovolcanic activity in and around Tenerife Island. We report that significant changes in survey physicochemical and chemical parameters through time were observed. Several geochemical signals record the occurrence of magmatic fluid injections in the hydrothermal system of Tenerife: during June‐August of 2016 there were increases in diffuse H 2 S emission, observed relatively higher values of diffuse H 2 S/CO 2 He/CO 2 , and CO 2 /CH 4 degassing ratios and changes in the carbon isotopic ratio of diffuse CO 2 degassing. Convective mixing within a magma reservoir triggered by an injection of fresh magma is confirmed as the most plausible scenario to explain the source of fluid injection into the hydrothermal system of Teide.