Morphological and geochemical features of crater lakes in Costa Rica: an overview
This paper describes the compositional and morphological features of the crater lakes found in the volcanoes of Rincón de La Vieja, Poás, Irazú, Congo and Tenorio volcanoes (Costa Rica). As evidenced by the distribution of the water and dissolved gas chemistry along vertical profiles, the different fluid sources feeding the lakes reflect the present status of each of the volcanic systems. The chemical features of the Caliente (Poás volcano) and Rincón crater (Rincón de la Vieja volcano) lakes are mainly dependent on i) inputs of magmatic fluids from sub-lacustrine fumaroles and ii) water-rock interaction processes. Conversely, the Irazú lake is mainly affected by the presence of CO2(H2S)-rich fluids discharged from a hydrothermal system, which masked possible magmatic fluid contributions. Rainfall and organic activity are the main factors responsible for the chemical composition of Hule, Botos, Congo and Tenorio lakes. The chemical and isotopic water composition of Botos, Irazú and Hule lakes have displayed no significant variations along the vertical profiles. In contrast, Caliente lake shows a distinctive chemical stratification, mainly involving F-, Cl- and SO4 2-. The behaviour of these compounds seems to be governed by both dissolution of highly acidic species, i.e. HF, HCl and SO2 released from the magmatic environment, and microbial activity. Despite the significant increases with depth of dissolved CO2 at Caliente and Irazú lakes, the hazard for Nyos-type gas eruptions can be considered negligible, since i) the water volumes are too small and ii) the convective heat transfer limits the CO2 recharge rate. The relatively high concentrations of dissolved CO2 measured at the maximum depth of the Hule lake are likely produced by both degradation of organic material and degassing from a deep source. The sporadic episodes of fish deaths recently observed in this lake can be associated with lake overturn processes that have favoured the rise up to the lake surface of deep, oxygen-depleted waters.
Main Authors: | , , , , , , |
---|---|
Format: | http://purl.org/coar/resource_type/c_6501 biblioteca |
Language: | eng |
Published: |
Journal of limnology
2009
|
Online Access: | http://hdl.handle.net/11056/17925 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:https:--repositorio.una.ac.cr:11056-17925 |
---|---|
record_format |
koha |
spelling |
oai:https:--repositorio.una.ac.cr:11056-179252020-08-20T09:01:09Z Morphological and geochemical features of crater lakes in Costa Rica: an overview Tassi, Franco Vaselli, Orlando Fernández, Erik Duarte, Eliecer Martínez, María Delgado Huertas, Antonio Bergamaschi, Francesco This paper describes the compositional and morphological features of the crater lakes found in the volcanoes of Rincón de La Vieja, Poás, Irazú, Congo and Tenorio volcanoes (Costa Rica). As evidenced by the distribution of the water and dissolved gas chemistry along vertical profiles, the different fluid sources feeding the lakes reflect the present status of each of the volcanic systems. The chemical features of the Caliente (Poás volcano) and Rincón crater (Rincón de la Vieja volcano) lakes are mainly dependent on i) inputs of magmatic fluids from sub-lacustrine fumaroles and ii) water-rock interaction processes. Conversely, the Irazú lake is mainly affected by the presence of CO2(H2S)-rich fluids discharged from a hydrothermal system, which masked possible magmatic fluid contributions. Rainfall and organic activity are the main factors responsible for the chemical composition of Hule, Botos, Congo and Tenorio lakes. The chemical and isotopic water composition of Botos, Irazú and Hule lakes have displayed no significant variations along the vertical profiles. In contrast, Caliente lake shows a distinctive chemical stratification, mainly involving F-, Cl- and SO4 2-. The behaviour of these compounds seems to be governed by both dissolution of highly acidic species, i.e. HF, HCl and SO2 released from the magmatic environment, and microbial activity. Despite the significant increases with depth of dissolved CO2 at Caliente and Irazú lakes, the hazard for Nyos-type gas eruptions can be considered negligible, since i) the water volumes are too small and ii) the convective heat transfer limits the CO2 recharge rate. The relatively high concentrations of dissolved CO2 measured at the maximum depth of the Hule lake are likely produced by both degradation of organic material and degassing from a deep source. The sporadic episodes of fish deaths recently observed in this lake can be associated with lake overturn processes that have favoured the rise up to the lake surface of deep, oxygen-depleted waters. Journal of limnology 2020-08-19T16:46:42Z 2020-08-19T16:46:42Z 2009 http://purl.org/coar/resource_type/c_6501 http://hdl.handle.net/11056/17925 10.3274/JL09-68-2-04 eng Acceso abierto Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Journal of limnology |
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 |
description |
This paper describes the compositional and morphological features of the crater lakes found in the volcanoes of Rincón de La Vieja, Poás, Irazú, Congo and Tenorio volcanoes (Costa Rica). As evidenced by the distribution of the water and dissolved gas chemistry along vertical profiles, the different fluid sources feeding the lakes reflect the present status of each of the volcanic systems. The chemical features of the Caliente (Poás volcano) and Rincón crater (Rincón de la Vieja volcano) lakes are mainly dependent on i) inputs of magmatic fluids from sub-lacustrine fumaroles and ii) water-rock interaction processes. Conversely, the Irazú lake is mainly affected by the presence of CO2(H2S)-rich fluids discharged from a hydrothermal system, which masked possible magmatic fluid contributions. Rainfall and organic activity are the main factors responsible for the chemical composition of Hule, Botos, Congo and Tenorio lakes. The chemical and isotopic water composition of Botos, Irazú and Hule lakes have displayed no significant variations along the vertical profiles. In contrast, Caliente lake shows a distinctive chemical stratification, mainly involving F-, Cl- and SO4 2-. The behaviour of these compounds seems to be governed by both dissolution of highly acidic species, i.e. HF, HCl and SO2 released from the magmatic environment, and microbial activity. Despite the significant increases with depth of dissolved CO2 at Caliente and Irazú lakes, the hazard for Nyos-type gas eruptions can be considered negligible, since i) the water volumes are too small and ii) the convective heat transfer limits the CO2 recharge rate. The relatively high concentrations of dissolved CO2 measured at the maximum depth of the Hule lake are likely produced by both degradation of organic material and degassing from a deep source. The sporadic episodes of fish deaths recently observed in this lake can be associated with lake overturn processes that have favoured the rise up to the lake surface of deep, oxygen-depleted waters. |
format |
http://purl.org/coar/resource_type/c_6501 |
author |
Tassi, Franco Vaselli, Orlando Fernández, Erik Duarte, Eliecer Martínez, María Delgado Huertas, Antonio Bergamaschi, Francesco |
spellingShingle |
Tassi, Franco Vaselli, Orlando Fernández, Erik Duarte, Eliecer Martínez, María Delgado Huertas, Antonio Bergamaschi, Francesco Morphological and geochemical features of crater lakes in Costa Rica: an overview |
author_facet |
Tassi, Franco Vaselli, Orlando Fernández, Erik Duarte, Eliecer Martínez, María Delgado Huertas, Antonio Bergamaschi, Francesco |
author_sort |
Tassi, Franco |
title |
Morphological and geochemical features of crater lakes in Costa Rica: an overview |
title_short |
Morphological and geochemical features of crater lakes in Costa Rica: an overview |
title_full |
Morphological and geochemical features of crater lakes in Costa Rica: an overview |
title_fullStr |
Morphological and geochemical features of crater lakes in Costa Rica: an overview |
title_full_unstemmed |
Morphological and geochemical features of crater lakes in Costa Rica: an overview |
title_sort |
morphological and geochemical features of crater lakes in costa rica: an overview |
publisher |
Journal of limnology |
publishDate |
2009 |
url |
http://hdl.handle.net/11056/17925 |
work_keys_str_mv |
AT tassifranco morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview AT vaselliorlando morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview AT fernandezerik morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview AT duarteeliecer morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview AT martinezmaria morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview AT delgadohuertasantonio morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview AT bergamaschifrancesco morphologicalandgeochemicalfeaturesofcraterlakesincostaricaanoverview |
_version_ |
1756475323647524864 |