{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1363670318640565888.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1144/sp437.12"}},{"identifier":{"@type":"URI","@value":"https://www.lyellcollection.org/doi/pdf/10.1144/SP437.12"}}],"dc:title":[{"@value":"HCl degassing from extremely acidic crater lakes: preliminary results from experimental determinations and implications for geochemical monitoring"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n          <jats:p>\n            Crater lakes are monitored to detect volcanic unrest starting from the assumption that they behave as condensers for magmatic gases. A further assumption is that acidic gases such as HCl are conservative once dissolved in water. This is not true for extremely acidic crater lakes, whose H\n            <jats:sup>+</jats:sup>\n            activity is high enough to induce Cl\n            <jats:sup>−</jats:sup>\n            hydrolysis and consequently HCl degassing. This study presents the results of experimental determinations at 40–45°C demonstrating that HCl degassing from acidic water depends on pH and Cl\n            <jats:sup>−</jats:sup>\n            concentration. HCl degassing starts at pH values\n            <jats:italic>c.</jats:italic>\n            0.05–0.1 with a rate of 5–10 mg min\n            <jats:sup>−1</jats:sup>\n            l\n            <jats:sup>−1</jats:sup>\n            , increasing up to\n            <jats:italic>c.</jats:italic>\n            70 mg min\n            <jats:sup>−1</jats:sup>\n            l\n            <jats:sup>−1</jats:sup>\n            at pH<−0.2. This implies that the rate of HCl removal from a crater lake with a volume of 10\n            <jats:sup>4</jats:sup>\n            –10\n            <jats:sup>5</jats:sup>\n            m\n            <jats:sup>3</jats:sup>\n            and a seawater-like Cl\n            <jats:sup>−</jats:sup>\n            concentration ranges from 5 to 50 t h\n            <jats:sup>−1</jats:sup>\n            . The estimated HCl/H\n            <jats:sub>2</jats:sub>\n            O ratio in the separated vapour phase (0.01–0.2) is coherent with HCl/H\n            <jats:sub>2</jats:sub>\n            O ratios of fumaroles. Our experiments imply that: (i) the presence of very acidic gas species in fumaroles can be associated with a liquid-dominated feeding system, and (ii) dissolved in extremely acidic crater lakes, Cl\n            <jats:sup>−</jats:sup>\n            behaves as a non-conservative component.\n          </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004236853164305","@type":"Researcher","foaf:name":[{"@value":"B. Capaccioni"}],"jpcoar:affiliationName":[{"@value":"Department of Biological, Geological and Environmental Sciences, University of Bologna, Bologna, Italy"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670318640565889","@type":"Researcher","foaf:name":[{"@value":"D. Rouwet"}],"jpcoar:affiliationName":[{"@value":"Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Italy"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670318640565890","@type":"Researcher","foaf:name":[{"@value":"F. Tassi"}],"jpcoar:affiliationName":[{"@value":"Department of Earth Sciences, University of Florence, Florence, Italy"},{"@value":"CNR-IGG Institute of Geosciences and Earth Resources, Florence, Italy"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03058719"},{"@type":"EISSN","@value":"20414927"}],"prism:publicationName":[{"@value":"Geological Society, London, Special Publications"}],"dc:publisher":[{"@value":"Geological Society of London"}],"prism:publicationDate":"2016-03-24","prism:volume":"437","prism:number":"1","prism:startingPage":"97","prism:endingPage":"106"},"reviewed":"false","dc:rights":["https://doi.org/10.15223/policy-002"],"url":[{"@id":"https://www.lyellcollection.org/doi/pdf/10.1144/SP437.12"}],"createdAt":"2016-03-25","modifiedAt":"2024-07-24","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050282813184395136","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Salt shell fallout during the ash eruption at the Nakadake crater, Aso volcano, Japan: evidence of an undergrounds hydrothermal system surrounding the erupting vent"},{"@value":"Salt shell fallout during the ash eruption at the Nakadake crater, Aso volcano, Japan : evidence of an underground hydrothermal system surrounding the erupting vent"}]},{"@id":"https://cir.nii.ac.jp/crid/1360013168844217088","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Quantitative Assessment of Temporal Changes in Subaqueous Hydrothermal Activity in Active Crater Lakes During Unrest Based on a Time-Series of Lake Water Chemistry"}]},{"@id":"https://cir.nii.ac.jp/crid/2051151842042438272","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Variation of volcanic gas composition during the eruptive period in 2014–2015 at Nakadake crater, Aso volcano, Japan"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1144/sp437.12"},{"@type":"CROSSREF","@value":"10.1186/s40623-018-0919-0_references_DOI_9AqwUowEKkcQ4bcITxcirsixYaI"},{"@type":"CROSSREF","@value":"10.3389/feart.2021.740671_references_DOI_7d2UUHDcbbHnXBixSrlCZTspwpM"},{"@type":"CROSSREF","@value":"10.1186/s40623-018-0798-4_references_DOI_7d2UUHDcbbHnXBixSrlCZTspwpM"}]}