MONITORING HYDROTHERMAL ALTERATION IN ACTIVE VOLCANOES USING REMOTE SENSING: THE CASE OF TURRIALBA VOLCANO (COSTA RICA)
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2014
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| _version_ | 1876478677402779648 |
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| author | Esperanza Bragado-Massa |
| author_facet | Esperanza Bragado-Massa |
| contents | MONITORING HYDROTHERMAL ALTERATION IN ACTIVE VOLCANOES USING REMOTE SENSING: THE CASE OF TURRIALBA VOLCANO (COSTA RICA) Esperanza Bragado-Massa Miguel Marchamalo Juan G. Rejas Javier Bonatti Jesús Martínez-Frías Geología PCA Costa Rica remote sensing Turrialba volcano Volcano monitoring Hydrothermal alteration was analyzed in the active Turrialba Volcano, Central Volcanic Range, CostaRica. Principal component analysis (PCA) techniques were applied to Thematic Mapper (1986 and 2001) and MODIS/ASTER airborne imagery (2003). Analyses were carried out using 4 input bands in PCA transformations to detect claysand iron oxides. The technique was adapted to MASTER sensor, selecting relevant bands for mineral detection. Argillicand limonitic zones were mapped for 1986, 2001 and 2003 images. Image analysis results are consistent with volcanicactivity from 1986 to 2003. Graben area was characterized by an overlap of alterations (limonitic and argillized) alongan N-S alignment. Multitemporal analysis showed enlargement of alteration area in Central and Southwestern craters.Reactivation of phreatic activity since 2010 developed in the same areas where increasing alteration was detected, thusvalidating results. This research contributes to the establishment of monitoring systems in volcanic areas based onremote sensing. 2014 artículo científico 0256-7024 https://www.redalyc.org/articulo.oa?id=45433964003 en http://www.redalyc.org/revista.oa?id=454 Revista Geológica de América Central application/pdf Universidad de Costa Rica Revista Geológica de América Central (Costa Rica) Num.51 |
| format | Artículo científico |
| id | redalyc_45433964003 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Universidad de Costa Rica |
| spellingShingle | MONITORING HYDROTHERMAL ALTERATION IN ACTIVE VOLCANOES USING REMOTE SENSING: THE CASE OF TURRIALBA VOLCANO (COSTA RICA) Esperanza Bragado-Massa Geología PCA Costa Rica remote sensing Turrialba volcano Volcano monitoring MONITORING HYDROTHERMAL ALTERATION IN ACTIVE VOLCANOES USING REMOTE SENSING: THE CASE OF TURRIALBA VOLCANO (COSTA RICA) Esperanza Bragado-Massa Miguel Marchamalo Juan G. Rejas Javier Bonatti Jesús Martínez-Frías Geología PCA Costa Rica remote sensing Turrialba volcano Volcano monitoring Hydrothermal alteration was analyzed in the active Turrialba Volcano, Central Volcanic Range, CostaRica. Principal component analysis (PCA) techniques were applied to Thematic Mapper (1986 and 2001) and MODIS/ASTER airborne imagery (2003). Analyses were carried out using 4 input bands in PCA transformations to detect claysand iron oxides. The technique was adapted to MASTER sensor, selecting relevant bands for mineral detection. Argillicand limonitic zones were mapped for 1986, 2001 and 2003 images. Image analysis results are consistent with volcanicactivity from 1986 to 2003. Graben area was characterized by an overlap of alterations (limonitic and argillized) alongan N-S alignment. Multitemporal analysis showed enlargement of alteration area in Central and Southwestern craters.Reactivation of phreatic activity since 2010 developed in the same areas where increasing alteration was detected, thusvalidating results. This research contributes to the establishment of monitoring systems in volcanic areas based onremote sensing. 2014 artículo científico 0256-7024 https://www.redalyc.org/articulo.oa?id=45433964003 en http://www.redalyc.org/revista.oa?id=454 Revista Geológica de América Central application/pdf Universidad de Costa Rica Revista Geológica de América Central (Costa Rica) Num.51 |
| title | MONITORING HYDROTHERMAL ALTERATION IN ACTIVE VOLCANOES USING REMOTE SENSING: THE CASE OF TURRIALBA VOLCANO (COSTA RICA) |
| topic | Geología PCA Costa Rica remote sensing Turrialba volcano Volcano monitoring |
| url | https://www.redalyc.org/articulo.oa?id=45433964003 |