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The chemical and hydrologic structure of Poas volcano, Costa Rica

Journal of Volcanology and Geothermal Research

By:
, , , and
DOI: 10.1016/0377-0273(94)00079-V

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Abstract

Comparison of the chemical characteristics of spring and river water draining the flanks of Poas Volcano, Costa Rica indicates that acid chloride sulfate springs of the northwestern flank of the volcano are derived by leakage and mixing of acid brines formed in the summit hydrothermal system with dilute flank groundwater. Acid chloride sulfate waters of the Rio Agrio drainage basin on the northwestern flank are the only waters on Poas that are affected by leakage of acid brines from the summit hydrothermal system. Acid sulfate waters found on the northwestern flank are produced by the interaction of surface and shallow groundwater with dry and wet acid deposition of SO2 and H2SO4 aerosols, respectively. The acid deposition is caused by a plume of acid gases that is released by a shallow magma body located beneath the active crater of Poas. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The chemical and hydrologic structure of Poas volcano, Costa Rica
Series title:
Journal of Volcanology and Geothermal Research
DOI:
10.1016/0377-0273(94)00079-V
Volume
64
Issue:
3-4
Year Published:
1995
Language:
English
Publisher:
Elsevier
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Volcanology and Geothermal Research
First page:
233
Last page:
267