Rare Earth and Trace Element Geochemistry of Clinopyroxenes from the Zabargad Peridotite-Pyroxenite Association (Articolo in rivista)

Type

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

Label

• Rare Earth and Trace Element Geochemistry of Clinopyroxenes from the Zabargad Peridotite-Pyroxenite Association (Articolo in rivista) (literal)

Anno

• 1991-01-01T00:00:00+01:00 (literal)

Alternative label

• Vannucci R. 1,2; Shimizu, N. 3; Bottazzi P. 1; Ottolini, L. 1; Piccardo G.B. 4; Rampone E. 4; (1991)
  Rare Earth and Trace Element Geochemistry of Clinopyroxenes from the Zabargad Peridotite-Pyroxenite Association
  in Journal of petrology (Print)
  (literal)

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

• Vannucci R. 1,2; Shimizu, N. 3; Bottazzi P. 1; Ottolini, L. 1; Piccardo G.B. 4; Rampone E. 4; (literal)

Pagina inizio

• 255 (literal)

Pagina fine

• 269 (literal)

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

• 2 (literal)

Rivista

• Journal of petrology (Rivista)

Note

• ISI Web of Science (WOS) (literal)

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

• 1. CNR, Ctr Studio Cristallochim & Cristallog, I-27100 Pavia, Italy; 2. Univ Pavia, Dipartimento Sci Terra, I-27100 Pavia, Italy; 3. Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA; 4. Univ Genoa, Dipartimento Sci Terra, I-16132 Genoa, Italy; (literal)

Titolo

• Rare Earth and Trace Element Geochemistry of Clinopyroxenes from the Zabargad Peridotite-Pyroxenite Association (literal)

Abstract

• Clinopyroxenes in spinel lherzolites and pyroxenites from the island of Zabargad (St. John's Island, Red Sea) were analysed for rare earth and other trace elements using an ion microprobe. The data indicate that the lherzolites represent mantle material compatible with a fertile source for mid-ocean ridge basalts (MORB), whereas depleted lherzolites record multiple processes, involving low-degree partial melting and successive light rare earth element (LREE) enrichment by melt percolation. Further, the ion microprobe data reveal that spinel pyroxenites are related to deep-seated tholeiitic and alkaline magmatism. Tholeiitic melts probably had garnet in the primary crystallizing assemblage, as suggested by the presence of clinopyroxene with low Sr and very high heavy rare earth element (HREE) and Sc abundances. All the clinopyroxenes are marked by significant depletions in Ti and Zr relative to neighbouring REE. Moreover, they form positive sub-parallel trends in Cr vs. Ti and Cr vs. Zr diagrams. These features were not produced during magmatic processes but resulted from complex processes including: (1) garnet breakdown (re-equilibration under spinel facies conditions); (2) early metasomatism (pargasite development); (3) growth of Mg-hornblende during the later stages of evolution. (literal)

Prodotto di

• Geochimica della litosfera (TA.P04.014.005) (Modulo)
• Istituto di geoscienze e georisorse (IGG) (Istituto)

Autore CNR

• LUISA OTTOLINI (Persona)
• PIERANTONIO BOTTAZZI (Unità di personale interno)

Incoming links:

Prodotto

• Istituto di geoscienze e georisorse (IGG) (Istituto)
• Geochimica della litosfera (TA.P04.014.005) (Modulo)

Autore CNR di

• LUISA OTTOLINI (Persona)
• PIERANTONIO BOTTAZZI (Unità di personale interno)

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

• Journal of petrology (Rivista)