Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/7910| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Masotta, M.; Dipartimento di Scienze della Terra, Sapienza—Universita` di Roma, | en |
| dc.contributor.authorall | Freda, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Gaeta, M.; Dipartimento di Scienze della Terra, Sapienza—Universita` di Roma, | en |
| dc.date.accessioned | 2012-03-23T08:36:26Z | en |
| dc.date.available | 2012-03-23T08:36:26Z | en |
| dc.date.issued | 2012 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/7910 | en |
| dc.description.abstract | Crystal-poor, differentiated magmas are com- monly erupted from shallow, thermally zoned magma chambers. In order to constrain the origin of these magmas, we have experimentally investigated crystallization, differentiation and crystal-melt separation in presence of a thermal gradient. Experiments have been designed taking advantage of the innate temperature gradient of the piston cylinder apparatus and carried out on a phonolitic system at 0.3 GPa and temperature ranging from 1,050 to 800 C. Crystallization degree and melt composition in experi- mental products vary as a function of the temperature gradient. In particular, melt composition differentiates from tephri-phonolite (starting material) to phonolite moving from the hotter, glassy zone (T B 1,050 C) towards the cooler, heterogeneously crystallized zone (T B 900 C) of the charge. The heterogeneously crystal- lized zone is made up of: (1) a crystal-rich, mushy region (crystallinity [30 vol%), (2) a rigid crystal framework (crystallinity B80 vol%) and (3) glassy belts of phonolitic glass at the top. Thermal gradient experiments picture crystallization, differentiation and crystal-melt separation processes occurring in a thermally zoned environment and reveal that relatively large volumes of crystal-poor melt (glassy belts) can originate as a consequence of the instability and collapse of the rigid crystal framework. Analogously, in thermally zoned magma chambers, the development and collapse of a solidification front may represent the controlling mechanism originating large volumes of crystal-poor, differentiated magmas. | en |
| dc.description.sponsorship | Sapienza Universita` di Roma,Istituto Nazionale di Geofisica e Vulcanologia. | en |
| dc.language.iso | English | en |
| dc.publisher.name | Springer Verlag Germany | en |
| dc.relation.ispartof | Contributions to Mineralogy and Petrology | en |
| dc.relation.ispartofseries | /163 (2012) | en |
| dc.subject | Explosive eruptions | en |
| dc.subject | Crystal-poor magma | en |
| dc.subject | Thermal gradient | en |
| dc.subject | Solidification front | en |
| dc.title | Origin of crystal-poor, differentiated magmas: insights from thermal gradient experiments | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | 49-65 | en |
| dc.subject.INGV | 04. Solid Earth::04.04. Geology::04.04.05. Mineralogy and petrology | en |
| dc.identifier.doi | 10.1007/s00410-011-0658-8 | en |
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| dc.description.obiettivoSpecifico | 2.3. TTC - Laboratori di chimica e fisica delle rocce | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | restricted | en |
| dc.relation.issn | 0010-7999 | en |
| dc.relation.eissn | 1432-0967 | en |
| dc.contributor.author | Masotta, M. | en |
| dc.contributor.author | Freda, C. | en |
| dc.contributor.author | Gaeta, M. | en |
| dc.contributor.department | Dipartimento di Scienze della Terra, Sapienza—Universita` di Roma, | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.department | Dipartimento di Scienze della Terra, Sapienza—Universita` di Roma, | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | restricted | - |
| item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
| item.fulltext | With Fulltext | - |
| crisitem.author.dept | Dipartimento di Scienze della Terra, Sapienza—Universita` di Roma, | - |
| crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia | - |
| crisitem.author.dept | Università La Sapienza | - |
| 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 | - |
| Appears in Collections: | Article published / in press | |
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| Masotta et al.PDF | main article | 1.37 MB | Adobe PDF |
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