The campanian ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal (Articolo in rivista)

Type

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

Label

• The campanian ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal (Articolo in rivista) (literal)

Anno

• 2008-01-01T00:00:00+01:00 (literal)

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

• 10.1007/s00410-007-0270-0 (literal)

Alternative label

• Pappalardo L.; Ottolini L.; Mastrolorenzo G. (2008)
  The campanian ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal
  in Contributions to mineralogy and petrology; SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 (Stati Uniti d'America)
  (literal)

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

• Pappalardo L.; Ottolini L.; Mastrolorenzo G. (literal)

Pagina inizio

• 1 (literal)

Pagina fine

• 26 (literal)

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

• 156 (literal)

Rivista

• Contributions to mineralogy and petrology (Rivista)

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

• 1 (literal)

Note

• ISI Web of Science (WOS) (literal)

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

• Pappalardo L. 1); Ottolini L. 2); Mastrolorenzo G. 1). 1) Inst Nazl Geofis & Vulcanol, Sezione Napoli Osservatorio Vesuviano, I-80124 Naples, Italy; 2) Consiglio Nazl Ric Inst Geosci & Georisorse, Sezione Pavia, I-27100 Pavia, Italy. (literal)

Titolo

• The campanian ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal (literal)

Abstract

• More than ca 100 km(3) of nearly homogeneous crystal-poor phonolite and ca 100 km(3) of slightly zoned trachyte were erupted 39 ka during the Campanian Ignimbrite super eruption, the most powerful in the Neapolitan area. Partition coefficient calculations, equilibrium mineral assemblages, glass compositions and texture were used to reconstruct compositional, thermal and pressure gradients in the pre-eruptive reservoir as well as timing and mechanisms of evolution towards magma chamber overpressure and eruption. Our petrologic data indicate that a wide sill-like trachytic magma chamber was active under the Campanian Plain at 2.5 kbar before CI eruption. Thermal exchange between high liquidus (1199 degrees C) trachytic sill and cool country rocks caused intense undercooling, driving a catastrophic and fast (10(2) years) in situ fractional crystallization and crustal assimilation that produced a water oversaturated phonolitic cap and an overpressure in the chamber that triggered the super eruption. This process culminated in an abrupt reservoir opening and in a fast single-step high decompression. Sanidine phenocrysts crystal size distributions reveal high differentiation rate, thus suggesting that such a sill-like magmatic system is capable of evolving in a very short time and erupting suddenly with only short-term warning. (literal)
• In our research we have carried out geochemical and textural analyses on Campanian Ignimbrite glass and minerals with the intent of investigating the development of such large magma chamber, and the mechanisms and timing that lead to unstable chamber conditions that generate large-scale explosive eruptions. Particularly, we determine: (1) for the first time trace element partition coefficients of Campanian Ignimbrite alkaline rocks essential to accurately model chemical magma evolution, (2) equilibrium minerals assemblages and glass compositions to reconstruct compositional, thermal and pressure gradients in the pre-eruptive reservoir, (3) crystal size distributions on feldspar phenocrysts to define crystal growth time, (4) bubble size number density and distribution of pumices that provided constraints on magma withdrawal, degassing and fragmentation conditions during eruption. (literal)

Editore

• SPRINGER, 233 SPRING ST (Editore)

Prodotto di

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Studio della distribuzione degli elementi e degli isotopi nell'astenosfera, litosfera, idrosfera e atmosfera (TA.P05.014.002) (Modulo)

Autore CNR

• LUISA OTTOLINI (Persona)

Insieme di parole chiave

• Keywords of "The campanian ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Studio della distribuzione degli elementi e degli isotopi nell'astenosfera, litosfera, idrosfera e atmosfera (TA.P05.014.002) (Modulo)

Autore CNR di

• LUISA OTTOLINI (Persona)

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

• Contributions to mineralogy and petrology (Rivista)

Editore di

• SPRINGER, 233 SPRING ST (Editore)

Insieme di parole chiave di

• Keywords of "The campanian ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal" (Insieme di parole chiave)