Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009)
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Universidad de Costa Rica
2009
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/geologica/article/view/3463 |
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RGAC34632023-04-26T01:58:22Z Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) Spampinato, Letizia Salerno, Giuseppe G. Martin, Robert S. Sawyer, Georgina M. Oppenheimer, Clive Ilyinskaya, Evgenia Ramírez, Carlos Imagen térmica flujo SO2 FTIR Poás Thermal imagery SO2 flux We report results from a multidisciplinary campaign conducted at Poás volcano (Costa Rica) in March 2009. Thermal imagery of the fumaroles sited on the north side of the pyroclastic cone revealed mean apparent temperatures ranging between 25 and 40°C with a maximum apparent temperature of 80°C. The crater lake surface was characterised by mean apparent temperatures varying between 30 and 35°C and a maximum recorded value of 48°C. Thermal profiles across the lake surface revealed steady temperatures and thus thorough convective mixing. The overall mean SO2 flux emitted from the crater was 76 Mg d-1, with approximately equal contributions from both the pyroclastic cone and the lake. Analysis of gas composition using active, open-path FTIR spectroscopy indicated molar ratios of H2O/SO2 = 151, CO2/SO2 = 1.56, SO2/HCl > 40, and SO2/HF > 200 for the lake emission. The plume was also sampled using filter packs. Ion chromatographic analysis revealed the presence of abundant K+ and SO4 2-, with small amounts of Ca2+, Cl-, and Mg2+. This provides a detailed picture of lake surface temperature characteristics and of gas flux and composition of the plume emitted from Poás. The results are consistent with the typical non-eruptive state of this volcano. . Universidad de Costa Rica 2009-07-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Text Article application/pdf https://revistas.ucr.ac.cr/index.php/geologica/article/view/3463 10.15517/rgac.v0i43.3463 Revista geológica de América central; Vol. 43 (2010) Revista geológica de América central; Vol. 43 (2010) 2215-261X 0256-7024 eng https://revistas.ucr.ac.cr/index.php/geologica/article/view/3463/3366 Derechos de autor 2014 Revista Geológica de América Central |
| institution |
Universidad de Costa Rica |
| collection |
Revista Geológica de América Central |
| language |
eng |
| format |
Online |
| author |
Spampinato, Letizia Salerno, Giuseppe G. Martin, Robert S. Sawyer, Georgina M. Oppenheimer, Clive Ilyinskaya, Evgenia Ramírez, Carlos |
| spellingShingle |
Spampinato, Letizia Salerno, Giuseppe G. Martin, Robert S. Sawyer, Georgina M. Oppenheimer, Clive Ilyinskaya, Evgenia Ramírez, Carlos Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| author_facet |
Spampinato, Letizia Salerno, Giuseppe G. Martin, Robert S. Sawyer, Georgina M. Oppenheimer, Clive Ilyinskaya, Evgenia Ramírez, Carlos |
| author_sort |
Spampinato, Letizia |
| description |
. |
| title |
Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| title_short |
Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| title_full |
Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| title_fullStr |
Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| title_full_unstemmed |
Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| title_sort |
thermal and geochemical signature of poás volcano, costa rica (march 2009) |
| title_alt |
Thermal and geochemical signature of Poás Volcano, Costa Rica (MARCH 2009) |
| publisher |
Universidad de Costa Rica |
| publishDate |
2009 |
| url |
https://revistas.ucr.ac.cr/index.php/geologica/article/view/3463 |
| work_keys_str_mv |
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