Significance of silicate melt pockets in upper mantle xenoliths from the Bakony - Balaton Highland Volcanic Field, Western Hungary

Eniko Bali, Csaba Szabó, Orlando Vaselli, K. Török

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Silicate melt pockets with or without carbonate occur in 10% of upper mantle xenoliths from the alkali basalts of the Bakony-Balaton Highland Volcanic Field (BBHVF), Western Hungary. Based on the estimated bulk composition of the melt pockets, both the carbonate-free and the carbonate-bearing ones are considered to be the result of the reaction between primary mantle clinopyroxene and/or amphibole and external CaO, Al2O3, alkali-rich and MgO-poor fluids/melts, as metasomatic agents, migrating in the upper mantle. The metasomatic melt that produced the carbonate-bearing melt pockets was extremely rich in volatiles, whereas metasomatic melt that contributed to the formation of the carbonate-free melt pockets was particularly rich in silica and relatively poor in volatiles. These metasomatizing melts could have originated from the melting of the previously metasomatized upper mantle due to Middle Miocene mantle diapirism.

Original languageEnglish
Pages (from-to)79-102
Number of pages24
JournalLithos
Volume61
Issue number1-2
DOIs
Publication statusPublished - 2002

Fingerprint

Silicates
Carbonates
silicate melt
upper mantle
melt
Bearings (structural)
carbonate
Alkalies
Amphibole Asbestos
mantle
Silicon Dioxide
diapirism
Melting
alkali basalt
amphibole
clinopyroxene
Fluids
melting
silica
Miocene

Keywords

  • Carbonatite
  • Mantle metasomatism
  • Melt pockets
  • Pannonian Basin
  • Silicate melt
  • Upper mantle xenolith

ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Significance of silicate melt pockets in upper mantle xenoliths from the Bakony - Balaton Highland Volcanic Field, Western Hungary. / Bali, Eniko; Szabó, Csaba; Vaselli, Orlando; Török, K.

In: Lithos, Vol. 61, No. 1-2, 2002, p. 79-102.

Research output: Contribution to journalArticle

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AU - Török, K.

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Y1 - 2002

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AB - Silicate melt pockets with or without carbonate occur in 10% of upper mantle xenoliths from the alkali basalts of the Bakony-Balaton Highland Volcanic Field (BBHVF), Western Hungary. Based on the estimated bulk composition of the melt pockets, both the carbonate-free and the carbonate-bearing ones are considered to be the result of the reaction between primary mantle clinopyroxene and/or amphibole and external CaO, Al2O3, alkali-rich and MgO-poor fluids/melts, as metasomatic agents, migrating in the upper mantle. The metasomatic melt that produced the carbonate-bearing melt pockets was extremely rich in volatiles, whereas metasomatic melt that contributed to the formation of the carbonate-free melt pockets was particularly rich in silica and relatively poor in volatiles. These metasomatizing melts could have originated from the melting of the previously metasomatized upper mantle due to Middle Miocene mantle diapirism.

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