Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/5426
DC Field | Value | Language |
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dc.contributor.authorall | Gaeta, Mario; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Di Rocco, Tommaso; Università di Roma La sapienza | en |
dc.contributor.authorall | Freda, Carmela; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.date.accessioned | 2010-01-05T12:01:33Z | en |
dc.date.available | 2010-01-05T12:01:33Z | en |
dc.date.issued | 2009-04-19 | en |
dc.identifier.uri | http://hdl.handle.net/2122/5426 | en |
dc.description.abstract | The geochemical characteristics of volcanic products in a variety of tectonic settings demonstrate that incorporation of crustal material into magmas is a relatively common process. Contamination of magmas by crustal components, in turn, can have a significant effect on magma composition and rheology. Despite this, the mechanism by which contamination occurs is still not well established and its efficacy is denied by some. In this study we focus on magma-carbonate interaction and on the rock shells (cumulates and skarns) formed at the contact between a magma chamber and its wall-rocks. We deduce that previous, unsuccessful attempts at carbonate assimilation-fractional crystallization (AFC) modelling can be related to the paucity of information about the cumulate zone in contact with skarns. We use one of the best examples of a magmatic plumbing system emplaced within a thick carbonate substratum (the Colli Albani Volcanic District in Central Italy) to demonstrate that a “skarn environment” can act as a source of CaO-rich silicate melts, and that the assimilation of these melts into the primitive magma is the main process responsible for magma contamination, rather than the ingestion of solid carbonate wall-rocks. In particular, by means of microtextural observations, mineral chemistry, whole-rock geochemical data and MELTS simulations we highlight the effect of high Ca-Tschermaks (CaAl2SiO6) activity in the melt on the stability of Cr-spinel, olivine, and clinopyroxene in cumulate rocks, define a reaction-cumulate zone where clinopyroxene crystallization is favoured, and model the magmatic differentiation processes active in this zone. | en |
dc.language.iso | English | en |
dc.relation.ispartof | European Geophysical Union | en |
dc.subject | Colli Albani | en |
dc.subject | carbonate assimilation | en |
dc.title | Carbonate assimilation in open magmatic systems: the role of melt-bearing skarns and cumulate-forming processes | en |
dc.type | Poster session | en |
dc.description.status | Published | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.03. Magmas | en |
dc.description.ConferenceLocation | vienna | en |
dc.description.obiettivoSpecifico | 2.3. TTC - Laboratori di chimica e fisica delle rocce | en |
dc.description.fulltext | open | en |
dc.contributor.author | Gaeta, Mario | en |
dc.contributor.author | Di Rocco, Tommaso | en |
dc.contributor.author | Freda, Carmela | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Università di Roma La sapienza | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
item.openairetype | Poster session | - |
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 | Università La Sapienza | - |
crisitem.author.dept | Università di Roma La sapienza | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
crisitem.author.orcid | 0000-0002-2320-8096 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Conference materials |
Files in This Item:
File | Description | Size | Format | |
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Gaeta et al.pdf | 108.9 kB | Adobe PDF | View/Open |
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