The relationship between potassic, calc-alkaline and Na-alkaline magmatism in south Italy volcanoes: A melt inclusion approach. (Articolo in rivista)

Type

• Prodotto della ricerca (Classe)
• Articolo in rivista (Classe)

Label

• The relationship between potassic, calc-alkaline and Na-alkaline magmatism in south Italy volcanoes: A melt inclusion approach. (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1016/S0012-821X(04)00048-2 (literal)

Alternative label

• Schiano P.; Clocchiatti R.; Ottolini L.; Sbrana A. (2004)
  The relationship between potassic, calc-alkaline and Na-alkaline magmatism in south Italy volcanoes: A melt inclusion approach.
  in Earth and planetary science letters
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Schiano P.; Clocchiatti R.; Ottolini L.; Sbrana A. (literal)

Pagina inizio

• 121 (literal)

Pagina fine

• 137 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

• The results allow a better assessment of mantle processes bearing on the genesis of the primary magma- types found in the studied volcanoes and provide a global framework within which to examine their significance for the geodynamic evolution of the South Italy region. This study was possible through the development of specific SIMS analytical procedures to measure the trace-element (Li to U) concentrations within micrometer-size melt inclusions, and was carried out with the ion microprobe installed at CNR-IGG (Pavia). --------------------- In the frame of the European Community's Human Potential Programme, contract HPRN-CT-2002-00211 (Euromelt). (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 220 (literal)

Rivista

• Earth and planetary science letters (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

• n. 1-2 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 1-2 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Schiano P. 1); Clocchiatti R. 2); Ottolini L. 3); Sbrana A. 4). 1) Univ Clermont Ferrand, Lab Magmas & Volcans, CNRS, OPGC, F-63038 Clermont Ferrand, France; 2) CEA, CNRS, Lab Pierre Sue, Ctr Etude Nucl Saclay, F-91191 Gif Sur Yvette, France; 3) CNR, IGG, Sez Pavia, I-27100 Pavia, Italy; 4) Univ Pisa, Dipartimento Sci Terra, I-56100 Pisa, Italy; (literal)

Titolo

• The relationship between potassic, calc-alkaline and Na-alkaline magmatism in south Italy volcanoes: A melt inclusion approach. (literal)

Abstract

• The present-day tectonic setting of the Tyrrhenian Sea is dominated by the eastward migration of the Tyrrhenian-Appenines subduction system and the existence of a contemporaneous and parallel extensional-compressional regime. This complex setting leads to the occurrence of a wide spectrum of magma-types in the South Italy volcanoes. Here, major and trace-element data for primitive melt inclusions preserved in olivine phenocrysts have been obtained in order to add constraints on the origin of the calc-alkaline magmas from the Aeolian arc (Stromboli and Vulcano islands), the potassic magmas from the Campania Province (Vesuvius and Phlegraean Fields) and the Na-alkaline magmas from Ustica Island. The approach used to determine the possible mantle sources of the trapped melts for each population of melt inclusions is based on the determination of the trace-element incompatibility sequence taken as the relative order of increasing bulk partition coefficients, which depends on the mineralogy of the source and gives direct information about minerals residual at the time of melting. Compositional similarities between the melt inclusions and their host lavas suggest that shallow-level magma contamination did not contribute significantly to the geochemical characteristics of the magma-types encountered in the region. Results of the trace-element modelling indicate that the melt inclusions from the Aeolian Islands and Campania Province volcanoes originate from mantle sources strongly affected by subduction-related metasomatic processes. Trace-element relationships of melt inclusions from Vulcano and Stromboli reflect melting of peridotitic sources that have been enriched by a slab-derived, aqueous fluid formed during dehydratation of K-free phases at shallow to intermediate depths. The negative high-field strength elements (HFSE) anomalies of these inclusions were generated in the absence of any residual phase in which HFSE might be compatible. In addition, their major element characteristics require the involvement of a clinopyroxene-rich source component in their genesis. With regard to the Vesuvius and Phlegraean Fields melt inclusions, their calculated incompatibility sequences point to a common phlogopite-bearing mantle source likely to be the result of interaction and hybridisation reactions with K2O and H2O-rich phases released from the slab at larger depths. Finally, trace-element characteristics of melt inclusions from Ustica Island imply the derivation from an upwelling enriched intraplate mantle source with a HIMU-type signature reflecting an ancient basaltic source component. Moreover, the source seems to be contaminated by a slab-derived fluid due to the rollback motion of the Ionian slab, in a process similar to that operating beneath Mount Etna, South of Ustica. (literal)
• Important information about the nature of the magma sources can be obtained from the relative concentrations of incompatible trace-elements in primitive melt inclusions preserved in olivine phenocrysts. Because they contain liquids that have formed in thermodynamic equilibrium with their host minerals, primary melt inclusions isolated in crystals may provide a record of the evolution of the host magma during growth of the host phases. Moreover, as only limited decompression of the inclusion takes place during the ascent, primary melt inclusions in early-formed olivine phenocrysts may isolate pristine samples of high-pressure mantle-derived melts that were trapped prior to shallow-level mixing or contamination processes. They can thus be used to obtain direct information on the processes that create magmas and the nature of their mantle source regions. Here, we characterise the source chemistry of melt inclusions in early-formed olivine phenocrysts in basalts from the Aeolian arc (Stromboli and Vulcano islands), Campania Province (Vesuvius and Phlegraean Fields) and Ustica Island, by examining their trace-element compositions. The approach used to determine the possible mantle sources of the trapped melts is based on the determination for each population of melt inclusions of the trace-element incompatibility sequence (i.e. the relative order of increasing bulk partition coefficients, which depends on the weight fractions of the source minerals), and utilises the determined sequence in conventional representation of basalt chemistry using trace-element concentrations normalised to primitive mantle values. (literal)

Prodotto di

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)

Autore CNR

• LUISA OTTOLINI (Persona)

Insieme di parole chiave

• Keywords of "The relationship between potassic, calc-alkaline and Na-alkaline magmatism in south Italy volcanoes: A melt inclusion approach." (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Metodologie integrate per la conoscenza di processi e materiali geologici e del loro impatto sull'uomo e l'ambiente (TA.P04.014.002) (Modulo)

Autore CNR di

• LUISA OTTOLINI (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Earth and planetary science letters (Rivista)

Insieme di parole chiave di

• Keywords of "The relationship between potassic, calc-alkaline and Na-alkaline magmatism in south Italy volcanoes: A melt inclusion approach." (Insieme di parole chiave)