Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system

Poás volcanic complex hosts a hyper-acid lake where geochemical signatures are related to two major controlling processes: (a) The level of inux and dissolution-hydrolysis of magmatic volatiles in a sub-surface hydrothermal reservoir forming extremely acidic brines, and (b) The amount of partial or wholesale dissolution of rock, enriching the waters in rock-forming elements. This combined uptake of magmatic volatiles and water-rock interaction makes the Poás lake-hydrothermal system one of the most dynamic and chemically extreme aqueous environments on Earth [1]. This study provides some datasets of the most salient geochemical signatures of the acid lake and their strongly uctuating behaviour observed over the last ca. 30 years. These signatures are investigated to a) Explore the nature and extent of compositional changes and ux of magmatic volatiles released from a shallow magma reservoir, and b) Gain insights into the modulating eects of the hydrothermal system underlying the acid lake to constraint a model for the Poás lake-hydrothermal system.

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Bibliographic Details
Main Authors: Martínez Cruz, María, Avard, Geoffroy, De Moor, J. Maarten, Van Bergen, M. J., Rodríguez, A., Campion, R., Pacheco, J. F.
Format: http://purl.org/coar/resource_type/c_6670 biblioteca
Language:eng
Published: International Association of Volcanology and Chemistry of the Earth's Interior 2014-09
Subjects:VOLCAN POAS (COSTA RICA), VOLCANES, VOLCANOES,
Online Access:http://hdl.handle.net/11056/18951
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spelling oai:https:--repositorio.una.ac.cr:11056-189512021-10-29T20:04:17Z Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system Martínez Cruz, María Avard, Geoffroy De Moor, J. Maarten Van Bergen, M. J. Rodríguez, A. Campion, R. Pacheco, J. F. VOLCAN POAS (COSTA RICA) VOLCANES VOLCANOES Poás volcanic complex hosts a hyper-acid lake where geochemical signatures are related to two major controlling processes: (a) The level of inux and dissolution-hydrolysis of magmatic volatiles in a sub-surface hydrothermal reservoir forming extremely acidic brines, and (b) The amount of partial or wholesale dissolution of rock, enriching the waters in rock-forming elements. This combined uptake of magmatic volatiles and water-rock interaction makes the Poás lake-hydrothermal system one of the most dynamic and chemically extreme aqueous environments on Earth [1]. This study provides some datasets of the most salient geochemical signatures of the acid lake and their strongly uctuating behaviour observed over the last ca. 30 years. These signatures are investigated to a) Explore the nature and extent of compositional changes and ux of magmatic volatiles released from a shallow magma reservoir, and b) Gain insights into the modulating eects of the hydrothermal system underlying the acid lake to constraint a model for the Poás lake-hydrothermal system. El complejo volcánico de Poás alberga un lago hiperácido donde las firmas geoquímicas están relacionadas con dos procesos de control principales: (a) El nivel de inux y disolución-hidrólisis de volátiles magmáticos en un reservorio hidrotermal subterráneo que forma salmueras extremadamente ácidas, y (b) La cantidad de disolución total o parcial de la roca, enriqueciendo las aguas en elementos formadores de rocas. Esta absorción combinada de volátiles magmáticos y la interacción agua-roca convierte al sistema hidrotermal del lago Poás en uno de los entornos acuosos más dinámicos y químicamente extremos de la Tierra [1]. Este estudio proporciona algunos conjuntos de datos de las firmas geoquímicas más destacadas del lago ácido y su comportamiento fuertemente fluctuante observado durante los últimos ca. 30 años. Estas firmas se investigan para a) explorar la naturaleza y el alcance de los cambios de composición y el flujo de volátiles magmáticos liberados de un depósito de magma poco profundo, yb) obtener información sobre los efectos moduladores del sistema hidrotermal subyacente al lago ácido para restringir un modelo para el Sistema hidrotermal del lago Poás. Universidad Nacional, Costa Rica Utrecht University, the Netherlands Universidad Nacional Autónoma de México, México 2021-03-25T15:43:21Z 2021-03-25T15:43:21Z 2014-09 http://purl.org/coar/resource_type/c_6670 http://hdl.handle.net/11056/18951 eng Acceso abierto application/pdf International Association of Volcanology and Chemistry of the Earth's Interior Cities on Volcanoes 8, Yogyakarta, Indonesia, 9-13 de septiembre, 2014
institution UNA CR
collection DSpace
country Costa Rica
countrycode CR
component Bibliográfico
access En linea
databasecode dig-una-cr
tag biblioteca
region America Central
libraryname Biblioteca de la Facultad de Ciencias de la Tierra y el Mar de la UNA CR
language eng
topic VOLCAN POAS (COSTA RICA)
VOLCANES
VOLCANOES
VOLCAN POAS (COSTA RICA)
VOLCANES
VOLCANOES
spellingShingle VOLCAN POAS (COSTA RICA)
VOLCANES
VOLCANOES
VOLCAN POAS (COSTA RICA)
VOLCANES
VOLCANOES
Martínez Cruz, María
Avard, Geoffroy
De Moor, J. Maarten
Van Bergen, M. J.
Rodríguez, A.
Campion, R.
Pacheco, J. F.
Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system
description Poás volcanic complex hosts a hyper-acid lake where geochemical signatures are related to two major controlling processes: (a) The level of inux and dissolution-hydrolysis of magmatic volatiles in a sub-surface hydrothermal reservoir forming extremely acidic brines, and (b) The amount of partial or wholesale dissolution of rock, enriching the waters in rock-forming elements. This combined uptake of magmatic volatiles and water-rock interaction makes the Poás lake-hydrothermal system one of the most dynamic and chemically extreme aqueous environments on Earth [1]. This study provides some datasets of the most salient geochemical signatures of the acid lake and their strongly uctuating behaviour observed over the last ca. 30 years. These signatures are investigated to a) Explore the nature and extent of compositional changes and ux of magmatic volatiles released from a shallow magma reservoir, and b) Gain insights into the modulating eects of the hydrothermal system underlying the acid lake to constraint a model for the Poás lake-hydrothermal system.
format http://purl.org/coar/resource_type/c_6670
topic_facet VOLCAN POAS (COSTA RICA)
VOLCANES
VOLCANOES
author Martínez Cruz, María
Avard, Geoffroy
De Moor, J. Maarten
Van Bergen, M. J.
Rodríguez, A.
Campion, R.
Pacheco, J. F.
author_facet Martínez Cruz, María
Avard, Geoffroy
De Moor, J. Maarten
Van Bergen, M. J.
Rodríguez, A.
Campion, R.
Pacheco, J. F.
author_sort Martínez Cruz, María
title Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system
title_short Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system
title_full Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system
title_fullStr Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system
title_full_unstemmed Poás volcano: Geophysical-Geochemical signatures and dynamics of its magmatic-hydrothermal system
title_sort poás volcano: geophysical-geochemical signatures and dynamics of its magmatic-hydrothermal system
publisher International Association of Volcanology and Chemistry of the Earth's Interior
publishDate 2014-09
url http://hdl.handle.net/11056/18951
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