Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/12911
DC Field | Value | Language |
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dc.date.accessioned | 2019-12-04T07:48:02Z | en |
dc.date.available | 2019-12-04T07:48:02Z | en |
dc.date.issued | 2018 | en |
dc.identifier.uri | http://hdl.handle.net/2122/12911 | en |
dc.description.abstract | The Secche di Lazzaro formation (ca. 6.2-7 kys BP) is a phreatomagmatic deposit situated in the southwestern part of the island of Stromboli (Aeolian Archipelago, Italy). The volcanic sequence is comprised of three main units. In the lower unit accretionary lapilli are particularly abundant and are characterized by strong cementation between the particles and an uncommon resistance to breakage. To understand the processes behind the formation of the Secche di Lazzaro (SdL) accretionary lapilli a multi-analytical approach was used on the lapilli Aggregate Tuff (AT), and on single Accretionary Lapilli (AL). We carried out granulometric analysis, Field Emission – Scanning Electron Microscopy (FE-SEM), Electron Microprobe Analysis (EMPA), X-ray powder diffraction (XRPD) and 3D imaging by X-ray micro-tomography (X-mCT). The granulometric data show that most particles in the AT have a diameter equal to Φ -1 corresponding to 2 mm. The EMPA, FE-SEM and XRPD analyses reveal the presence of different mineral phases, mainly plagioclase, K-feldspar, halite, and clinopyroxene, together with volcanic glass. From the X-mCT analysis, we constrained the particle distribution and estimated the porosity of AL. The results of the FE-SEM images provided the chemical distribution within individual lapilli allowing the identification of rim and core zoning as well as the presence of halite located both on the border of single lapilli and on the juncture between different lapilli. Moreover, halite occurs among different aggregates in single AL, thus acting as a binding agent, as well as within rim pores. The results of this work shed new light into the formation of accretionary lapilli in phreatomagmatic eruption a t volcanic island involving marine water. | en |
dc.description.sponsorship | University of Perugia (Progetti Ricerca di Base MORGABASE2015). European Research Council with the Consolidator grant CHRONOS (612776). European project EUROVOLC (grant agreement number 731070). MIUR project Premiale Ash-RESILIENCE. | en |
dc.language.iso | English | en |
dc.publisher.name | INGV | en |
dc.relation.ispartof | Annals of Geophysics | en |
dc.relation.ispartofseries | 6 sup /61 (2018) | en |
dc.subject | Accretionary Lapilli | en |
dc.subject | Stromboli | en |
dc.subject | X-ray microtomography | en |
dc.subject | Salt | en |
dc.title | Volcanic ash aggregation enhanced by seawater interaction: the case of Secche di Lazzaro phreatomagmatic deposit (Stromboli) | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | VO674 | en |
dc.subject.INGV | VOLCANIC ASH AGGREGATION, PHREATOMAGMATIC DEPOSIT | en |
dc.identifier.doi | 10.4401/ag-7874 | en |
dc.description.obiettivoSpecifico | 5V. Processi eruttivi e post-eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Morgavi, Daniele | en |
dc.contributor.author | Valentini, Luca | en |
dc.contributor.author | Porreca, Massimiliano | en |
dc.contributor.author | Zucchini, Azzurra | en |
dc.contributor.author | Di Michele, Alessandro | en |
dc.contributor.author | Ielpo, Miriam | en |
dc.contributor.author | Costa, Antonio | en |
dc.contributor.author | Rossi, Stefano | en |
dc.contributor.author | Landi, Patrizia | en |
dc.contributor.author | Perugini, Diego | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia | - |
crisitem.author.orcid | 0000-0002-2858-1586 | - |
crisitem.author.orcid | 0000-0001-6302-872X | - |
crisitem.author.orcid | 0000-0001-8628-606X | - |
crisitem.author.orcid | 0000-0002-5603-8353 | - |
crisitem.author.orcid | 0000-0002-0357-2608 | - |
crisitem.author.orcid | 0000-0002-4987-6471 | - |
crisitem.author.orcid | 0000-0002-8463-5710 | - |
crisitem.author.orcid | 0000-0002-2888-6128 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | |
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Morgavi et al_2018.pdf | 2.15 MB | Adobe PDF | View/Open |
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