Fluid-mineral dynamics at the Rincón de la Vieja volcano-hydrothermal system (Costa Rica) inferred by the study of major, minor and rare earth elements in the hyperacid crater lake
Por:
Pappaterra, Sabrina, Inguaggiato, Claudio, Rouwet, Dmitri, Levresse, Gilles, Peiffer, Loic, Apollaro, Carmine, Mora-Amador, Raul, Ramirez-Umana, Carlos, Gonzalez, Gino, Schiavo, Benedetto, Kretzschmar, Thomas Gunter, Brusca, Lorenzo
Publicada:
3 oct 2023
Categoría:
Earth and planetary sciences (miscellaneous)
Resumen:
Volcanic lakes are complex natural systems and their chemical
composition is related to a myriad of processes. The chemical
composition of major, minor, Rare Earth Elements (REE) and
physico-chemical parameters at the hyperacid crater lake of Rincon de la
Vieja volcano (Costa Rica) are here investigated during February
2013-August 2014. The study of the lake chemical composition allows to
identify the main geochemical processes occurring in the lake and to
track the changes in the volcanic activity, both important for active
volcanoes monitoring. The total REE concentration ( n-ary sumation REE)
dissolved in the crater lake varies from 2.7 to 3.6 mg kg-1 during the
period of observation. REE in the water lake samples normalized to the
average volcanic local rock (REEN-local rock) are depleted in light REE
(LREE). On the contrary REEN-local rock in the solids precipitated
(mainly gypsum/anhydrite), from lake water samples in laboratory at 22
degrees C, are enriched in LREE. The low variability of (La/Pr)N-local
rock and (LREE/HREE)N-local rock ratios (0.92-1.07 and 0.66-0.81,
respectively) in crater lake waters is consistent with the low phreatic
activity (less than 10 phreatic eruptions in 2 years) observed during
the period of observation. This period of low activity precedes the
unrest started in 2015, thus, it could be considered as a pre-unrest,
characterized by infrequent phreatic eruptions. No clear changes in the
REE chemistry are associated with the phreatic eruption occurred at
mid-2013. The results obtained investigating water-rock interaction
processes at the Rincon de la Vieja crater lake show that rock
dissolution and mineral precipitation/dissolution are the main processes
that control the variability of cations composition over time. In
particular, precipitation and dissolution of gypsum and alunite are
responsible for the variations of REE in the waters. Despite the low
variations of (La/Pr)N-local rock and (LREE/HREE)N-local rock ratios,
this study allows to suggest that REE can be used, together with major
elements, as practical tracers of water-rock interaction processes and
mineral precipitation/dissolution at active hyperacid crater lakes over
time, also during periods of quiescence and low phreatic activity.
Filiaciones:
Pappaterra, Sabrina:
Posgrado en Ciencias de la Tierra, Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California (CICESE), Carretera Ensenada-Tijuana, Ensenada, Mexico
Inguaggiato, Claudio:
Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California (CICESE), Carretera Ensenada-Tijuana, Ensenada, Mexico
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Rouwet, Dmitri:
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Levresse, Gilles:
Centro de Geociencias, Querétaro, Mexico
Peiffer, Loic:
Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California (CICESE), Carretera Ensenada-Tijuana, Ensenada, Mexico
Unidad La Paz (ULP), Centro de Investigación Científica y Educación Superior de Ensenada, Baja California (CICESE), La Paz, Mexico
Apollaro, Carmine:
Dipartimento di Biologia, Ecologia e Scienze della Terra, Università della Calabria, Cosenza, Arcavacata di Rende, Italy
Mora-Amador, Raul:
Centro de Investigaciones en Ciencias Geológicas, Universidad de Costa Rica, San José, Costa Rica
Ramirez-Umana, Carlos:
Servicio Geológico Ambiental de Costa Rica (SeGeoAm), San José, Costa Rica
Gonzalez, Gino:
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Bologna, Italy
Dipartimento di Scienze della Terra e Geoambientali, Università degli Studi di Bari Aldo Moro, Bari, Italy
Volcanes Sin Fronteras, San Jose, Costa Rica
Schiavo, Benedetto:
Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico City, Mexico
Kretzschmar, Thomas Gunter:
Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada, Baja California (CICESE), Carretera Ensenada-Tijuana, Ensenada, Mexico
Brusca, Lorenzo:
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, Italy
gold, All Open Access; Gold
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