Implications for Volcanic Hazards in the Central and Southern Cascades Based on Gas Emissions During Explosive Cinder Cone Activity

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dc.contributor.advisorWallace, Paulen_US
dc.contributor.authorWalsh, Lucyen_US
dc.date.accessioned2013-07-11T19:59:32Z
dc.date.available2013-07-11T19:59:32Z
dc.date.issued2013-07-11
dc.description.abstractVolatile emissions from Cascades cinder cone eruptions have been well-documented; however the implications for understanding the effects that volcanic gases have on surrounding communities have not been addressed. This study examines the hazards from volatile degassing during explosive activity by (1) analyzing S, Cl, and F concentrations dissolved in olivine-hosted melt inclusions and matrix glass from cinder cones located in central Oregon and northern California, (2) estimating the mass of volcanic gas degassed during these eruptions, and (3) predicting gas concentrations downwind of the vent. Analyses reveal that the magmas degassed >88% S, <49% Cl, and <50% F during eruption, equating to a release of ≤4.5 Mt SO2, ≤0.2 Mt HCl, and ≤0.2 Mt HF. Predictions of gas concentrations downwind of the vent provides reassurance that the levels of volcanic gases were not high enough at the time of eruption to present acute or severe health hazards to nearby residents.en_US
dc.identifier.urihttps://hdl.handle.net/1794/12977
dc.language.isoen_USen_US
dc.publisherUniversity of Oregonen_US
dc.rightsAll Rights Reserved.en_US
dc.subjectCascadesen_US
dc.subjectCinder coneen_US
dc.subjectDegassingen_US
dc.subjectGasen_US
dc.subjectHazardsen_US
dc.subjectVolatileen_US
dc.titleImplications for Volcanic Hazards in the Central and Southern Cascades Based on Gas Emissions During Explosive Cinder Cone Activityen_US
dc.typeElectronic Thesis or Dissertationen_US
thesis.degree.disciplineDepartment of Geological Sciencesen_US
thesis.degree.grantorUniversity of Oregonen_US
thesis.degree.levelmastersen_US
thesis.degree.nameM.S.en_US

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