Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7846
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dc.contributor.authorallCas, R.en
dc.contributor.authorallGiordano, G.en
dc.contributor.authorallBalsamo, F.en
dc.contributor.authorallEsposito, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
dc.contributor.authorallLo Mastro, S.en
dc.date.accessioned2012-02-23T09:25:06Zen
dc.date.available2012-02-23T09:25:06Zen
dc.date.issued2011en
dc.identifier.urihttp://hdl.handle.net/2122/7846en
dc.description.abstractPanarea is a largely submarine to partly subaerial Quaternary lava dome complex-stratovolcano with a long-lived, active, shallow hydrothermal system, located in the Aeolian Islands volcanic arc of southern Italy. The emergent top of the volcano forms a small archipelago, made up of calc-alkaline basaltic andesite to rhyolite lava domes (ca. 150–20 ka). We document the facies outcropping on Lisca Bianca islet, Panarea archipelago, based on grain size, clast fabric, and degree of hydrothermal alteration, identifying coherent facies, boulder breccia facies, cobble breccia facies, pebble breccia facies, and pervasively altered andesite facies (alunite-marcasite-sulfur). The breccias all have ubiquitous jigsaw-fit clast textures, and are variably hydrothermally altered. The breccias are interpreted as hydrothermal breccias and are distinguished from primary volcanic facies based on their distinguishing characteristics. The breccias formed through a cyclical process, involving the following: stage 1: progressive build-up of fluid pressure toward the level of the tensile strength of the host andesite; stage 2: incipient fracturing of the andesite when fluid pressure approaches and then exceeds the tensile strength of the andesite under critical fracturing conditions; stage 3: pervasive fracturing of the host andesite, leading to an increase in permeability as a network of fractures develops; stage 4: declining pressure, with fluid flow rates that lead to infilling and sealing of fractures by natroalunite, thereby reducing permeability, leading to progressive build-up of fluid pressure again, and the beginning of a new cycle.en
dc.language.isoEnglishen
dc.publisher.nameSociety of Economic Geologistsen
dc.relation.ispartofEconomic Geologyen
dc.relation.ispartofseries3/106(2011)en
dc.subjectHydrothermal Breccia Texturesen
dc.titleHydrothermal Breccia Textures and Processes: Lisca Bianca Islet, Panarea Volcano, Aeolian Islands, Italyen
dc.typearticleen
dc.description.statusPublisheden
dc.description.pagenumber437-450en
dc.subject.INGV03. Hydrosphere::03.02. Hydrology::03.02.99. General or miscellaneousen
dc.description.journalTypeJCR Journalen
dc.description.fulltextrestricteden
dc.relation.issn0361-0128en
dc.relation.eissn1554-0774en
dc.contributor.authorCas, R.en
dc.contributor.authorGiordano, G.en
dc.contributor.authorBalsamo, F.en
dc.contributor.authorEsposito, A.en
dc.contributor.authorLo Mastro, S.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italiaen
item.openairetypearticle-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextrestricted-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
crisitem.author.deptUniversità degli Studi di Roma Tre-
crisitem.author.deptNEXT – Natural and Experimental Tectonics Research Group, Università degli Studi di Parma, Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, 43124 Parma, Italy-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia-
crisitem.author.orcid0000-0002-5819-443X-
crisitem.author.orcid0000-0003-1931-466X-
crisitem.author.orcid0000-0002-9456-8101-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent03. Hydrosphere-
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