0000000000886662

AUTHOR

Fátima Viveiros

showing 3 related works from this author

The fumarolic CO2 output from Pico do Fogo volcano (Cape Verde)

2020

The Pico do Fogo volcano, in the Cape Verde Archipelago off the western coasts of Africa, has been the most active volcano in the Macaronesia region in the Central Atlantic, with at least 27 eruptions during the last 500 years. Between eruptions fumarolic activity has been persisting in its summit crater, but limited information exists for the chemistry and output of these gas emissions. Here, we use the results acquired during a field survey in February 2019 to quantify the quiescent summit fumaroles' volatile output for the first time. By combining measurements of the fumarole compositions (using both a portable Multi-GAS and direct sampling of the hottest fumarole) and of the SO2 flux (u…

event.disaster_typeCape VerdeCO2 outputgeographyGEO/07 - PETROLOGIA E PETROGRAFIAgeography.geographical_feature_categoryPico do Fogo volcanoDirect samplingGeochemistryCape Verde CO2 output Pico do Fogo volcano Volcani gasesFluxGeology010502 geochemistry & geophysics01 natural sciencesFumaroleVolcanic GasesCape verdeVolcani gaseVolcanoImpact craterGEO/08 - GEOCHIMICA E VULCANOLOGIAArchipelagoGeneral Earth and Planetary Sciencesevent0105 earth and related environmental sciencesItalian Journal of Geosciences
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Total (fumarolic + diffuse soil) CO2 output from Furnas volcano

2015

Furnas volcano, in São Miguel island (Azores), being the surface expression of rising hydrothermal steam, is the site of intense carbon dioxide (CO2) release by diffuse degassing and fumaroles. While the diffusive CO2 output has long (since the early 1990s) been characterized by soil CO2 surveys, no information is presently available on the fumarolic CO2 output. Here, we performed (in August 2014) a study in which soil CO2 degassing survey was combined for the first time with the measurement of the fumarolic CO2 flux. The results were achieved by using a GasFinder 2.0 tunable diode laser. Our measurements were performed in two degassing sites at Furnas volcano (Furnas Lake and Furnas Villag…

Hydrologygeographygeography.geographical_feature_categoryFurnas volcanoFull PaperSoil diffuse degassingCo2 fluxMineralogyCarbon dioxide fluxGeologyFumarolesFumaroleFumaroleHydrothermal circulationSettore GEO/08 - Geochimica E VulcanologiaSoil co2 fluxchemistry.chemical_compoundchemistryVolcano13. Climate actionSpace and Planetary ScienceSoil waterCarbon dioxideSurface expressionGeologyEarth, Planets, and Space
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New insights into the magmatic-hydrothermal system and volatile budget of Lastarria volcano, Chile: Integrated results from the 2014 IAVCEI CCVG 12th…

2018

Recent geophysical evidence for large-scale regional crustal inflation and localized crustal magma intrusion has made Lastarria volcano (northern Chile) the target of numerous geological, geophysical, and geochemical studies. The chemical composition of volcanic gases sampled during discrete campaigns from Lastarria volcano indicated a well-developed hydrothermal system from direct fumarole samples in A.D. 2006, 2008, and 2009, and shallow magma degassing using measurements from in situ plume sampling techniques in 2012. It is unclear if the differences in measured gas compositions and resulting interpretations were due to artifacts of the different sampling methods employed, short-term exc…

geographygeography.geographical_feature_category010504 meteorology & atmospheric sciencesSO2 emissioncarbon isotopeStratigraphyCO2 flux SO2 emission Cenral Andes Northern Chile carbon isotopeGeochemistryGeology010502 geochemistry & geophysicsLastarria Volcano01 natural sciencesHydrothermal circulationVolcanoNorthern ChileCenral AndesChileHydrothermal gasesCO2 fluxGeology0105 earth and related environmental sciences
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