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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4479
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dc.contributor.authorallWitt, M. L. I.; Department of Earth Sciences, University of Oxford, Oxford, UK.en
dc.contributor.authorallMather, T. A.; Department of Earth Sciences, University of Oxford, Oxford, UK.en
dc.contributor.authorallPyle, D. M.; Department of Earth Sciences, University of Oxford, Oxford, UK.en
dc.contributor.authorallAiuppa, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.authorallBagnato, E.; Dipartimento di Chimica e Fisica della Terra ed Applicazioni alle Georisorse e ai Rischi Naturali, Universita` di Palermo, Palermo, Italy.en
dc.date.accessioned2008-12-04T15:09:38Zen
dc.date.available2008-12-04T15:09:38Zen
dc.date.issued2008-06-13en
dc.identifier.urihttp://hdl.handle.net/2122/4479en
dc.description.abstractWe report measurements of Hg, SO2, and halogens (HCl, HBr, HI) in volcanic gases from Masaya volcano, Nicaragua, and gaseous SO2 and halogens from Telica volcano, Nicaragua. Mercury measurements were made with a Lumex 915+ portable mercury vapor analyzer and gold traps, while halogens, CO2 and S species were monitored with a portable multi gas sensor and filter packs. Lumex Hg concentrations in the plume were consistently above background and ranged up to 350 ng/m3. Hg/SO2 mass ratios measured with the real-time instruments ranged from 1.1*10-7 to 3.5*10-5 (mean 2*10-5). Total gaseous mercury TGM)concentrations measured by gold trap ranged from 100 to 225 ng/m3. Reactive gaseous mercury accounted for 1% of TGM, while particulate mercury was 5% of the TGM. Field measurements of Masaya’s SO2 flux, combined with the Hg/SO2 ratio, indicate a Hg flux from Masaya of 7.2 Mg/a-1. At Masaya’s low temperature fumaroles, Hg/CO2 mass ratios were consistently around 2*10-8, lower than observed in the main vent (Hg/CO2 10-7). Low-temperature fumarole Hg fluxes from Masaya are insignificant (150 g a-1). Ratios of S, C and halogen species were also measured at Masaya and Telica volcanoes. CO2/SO2 ratios at Masaya ranged from 2.8 to 3.9, comparable to previously published values. At Masaya molar Br/SO2 was 3*10-4 and I/SO2 was 2*10-5, suggesting fluxes of 0.2–0.5 Mg HBr d-1 and 0.02–0.05 Mg HI d-1. At Telica the Br/SO2 ratio was also 3*10-4 and the I/SO2 ratio was 5.8*10-5, with corresponding fluxes of 0.2 Mg HBr d-1 and 0.06 Mg HI d-1. Gases at both volcanoes are enriched in I relative to Br and Cl, compared to gases from volcanoes elsewhere.en
dc.description.sponsorshipThis work was funded by NERC grant NE/ C511180/1/.en
dc.language.isoEnglishen
dc.publisher.nameAGUen
dc.relation.ispartofJournal of Geophysical Researchen
dc.relation.ispartofseries/113 (2008)en
dc.subjectMercuryen
dc.subjectHalogenen
dc.subjectVolcanic emissionsen
dc.subjectMasaya volcanoen
dc.subjectTelica volcanoen
dc.titleMercury and halogen emissions from Masaya and Telica volcanoes, Nicaraguaen
dc.typearticleen
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.description.pagenumberB06203en
dc.identifier.URLhttp://www.agu.org/en
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistryen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.01. Gasesen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoringen
dc.subject.INGV04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniquesen
dc.identifier.doi10.1029/2007JB005401en
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dc.description.obiettivoSpecifico4.5. Degassamento naturaleen
dc.description.journalTypeJCR Journalen
dc.description.fulltextreserveden
dc.contributor.authorWitt, M. L. I.en
dc.contributor.authorMather, T. A.en
dc.contributor.authorPyle, D. M.en
dc.contributor.authorAiuppa, A.en
dc.contributor.authorBagnato, E.en
dc.contributor.departmentDepartment of Earth Sciences, University of Oxford, Oxford, UK.en
dc.contributor.departmentDepartment of Earth Sciences, University of Oxford, Oxford, UK.en
dc.contributor.departmentDepartment of Earth Sciences, University of Oxford, Oxford, UK.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Palermo, Palermo, Italiaen
dc.contributor.departmentDipartimento di Chimica e Fisica della Terra ed Applicazioni alle Georisorse e ai Rischi Naturali, Universita` di Palermo, Palermo, Italy.en
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crisitem.author.deptDepartment of Earth Sciences, University of Oxford-
crisitem.author.deptDepartment of Earth Sciences, University of Oxford-
crisitem.author.deptEarth Science Department, University of Oxford, UK-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia-
crisitem.author.orcid0000-0003-4259-7303-
crisitem.author.orcid0000-0002-0254-6539-
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crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
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crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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