Remnants of boninitic melts in the upper mantle beneath the central Pannonian Basin?

Bali, Enikő; Falus, György; Szabó, Csaba; Peate, David W.; Hidas, Károly; Török, Kálmán; Ntaflos, Th.

doi:10.1007/s00710-006-0167-z

Cited by 32 publications

(33 citation statements)

References 52 publications

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“…Kelemen et al 1992;Smith et al 1999;McInnes et al 2001;Santos et al 2002;Arai et al 2003Arai et al , 2004Arai et al , 2006Bali et al 2007Bali et al , 2008Rehfeldt et al 2008;Dantas et al 2009). Most studies explain orthopyroxene-enrichment of the mantle rocks either by reaction with aqueous SiO 2 -rich melts derived from slab dehydration and melting (e.g.…”

Section: The Orthopyroxene-enrichment and Poikilitic Texture Formationmentioning

confidence: 99%

“…Arai et al 2006;Dantas et al 2009). Some recent studies from the Carpathian-Pannonian-Balkan Region have interpreted the formation of orthopyroxene-enriched mantle lithologies as resulting from a percolating melt in the subcontinental lithosphere related to the melting of subducted slabs (Cvetković et al 2004(Cvetković et al , 2007Marchev et al 2006;Bali et al 2007Bali et al , 2008Berkesi et al 2012) or via magmatic liquids emerging from the asthenosphere associated with lithosphere thinning (Embey-Isztin et al 1989, 2001Embey-Isztin & Dobosi 2011).…”

Section: The Orthopyroxene-enrichment and Poikilitic Texture Formationmentioning

confidence: 99%

“…Kelemen et al 1992;Arai et al 2003Arai et al , 2004, (2) reaction products of interaction between mantle wall rock and silica-rich melts of alkali basaltic origin percolating in the mantle (e.g. Arai et al 2006;Dantas et al 2009), (3) maficultramafic cumulates crystallized at mantle depth (EmbeyIsztin et al 1989;Santos et al 2002;Cvetković et al 2004Cvetković et al , 2007Bali et al 2007) and (4) products of infiltration-crystallization-reaction processes (Wulff-Pedersen et al 1996. These rocks have been described from several localities of the Carpathian-Pannonian-Balkan Region (Embey-Isztin et al 1989, 2001Cvetković et al 2004Cvetković et al , 2007Bali et al 2007Bali et al , 2008Marchev et al 2008;Embey-Isztin & Dobosi 2011;Berkesi et al 2012) and show wide variations.…”

Section: Introductionmentioning

confidence: 99%

“…Arai et al 2006;Dantas et al 2009), (3) maficultramafic cumulates crystallized at mantle depth (EmbeyIsztin et al 1989;Santos et al 2002;Cvetković et al 2004Cvetković et al , 2007Bali et al 2007) and (4) products of infiltration-crystallization-reaction processes (Wulff-Pedersen et al 1996. These rocks have been described from several localities of the Carpathian-Pannonian-Balkan Region (Embey-Isztin et al 1989, 2001Cvetković et al 2004Cvetković et al , 2007Bali et al 2007Bali et al , 2008Marchev et al 2008;Embey-Isztin & Dobosi 2011;Berkesi et al 2012) and show wide variations. Some studies have proposed the origin of these orthopyroxene-enriched rocks as mantle-depth crystallization products from boninitic melts (Embey-Isztin et al 1989;Cvetković et al 2007;Bali et al 2007Bali et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

“…These rocks have been described from several localities of the Carpathian-Pannonian-Balkan Region (Embey-Isztin et al 1989, 2001Cvetković et al 2004Cvetković et al , 2007Bali et al 2007Bali et al , 2008Marchev et al 2008;Embey-Isztin & Dobosi 2011;Berkesi et al 2012) and show wide variations. Some studies have proposed the origin of these orthopyroxene-enriched rocks as mantle-depth crystallization products from boninitic melts (Embey-Isztin et al 1989;Cvetković et al 2007;Bali et al 2007Bali et al , 2008. Some recent papers (Cvetković et al 2004(Cvetković et al , 2010Embey-Isztin & Dobosi 2011) suggested the possibility of orthopyroxene-rich (poikilitic) lithologies as resulting from magmatic modification of the lithospheric mantle via infiltrating (alkaline) mafic melt.…”

Section: Introductionmentioning

confidence: 99%

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Orthopyroxene-enrichment in the lherzolite-websterite xenolith suite from Paleogene alkali basalts of the Poiana Ruscă Mountains (Romania)

Nédli¹,

Szabó²,

Dégi³

2015

Geologica Carpathica

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Abstract:In this paper we present the petrography and geochemistry of a recently collected lherzolite-websterite xenolith series and of clinopyroxene xenocrysts, hosted in Upper Cretaceous-Paleogene basanites of Poiana Ruscă (Romania), whose xenoliths show notable orthopyroxene-enrichment. In the series a slightly deformed porphyroclastic-equigranular textured series could represent the early mantle characteristics, and in many cases notable orthopyroxene growth and poikilitic texture formation was observed. The most abundant mantle lithology, Type A xenoliths have high Al-and Na-contents but low mg# of the pyroxenes and low cr# of spinel suggesting a low degree ( < 10 %) of mafic melt removal. They are also generally poor in overall REE-s (rare earth elements) and have flat REY (rare earth elements + Y) patterns with slight LREE-depletion. The geochemistry of the Type A xenoliths and calculated melt composition in equilibrium with the xenolith clinopyroxenes suggests that the percolating melt causing the poikilitization can be linked to a mafic, Al-Na-rich, volatile-poor melt and show similarity with the Late Cretaceous-Paleogene (66-72 Ma) subduction-related andesitic magmatism of Poiana Ruscă. Type B xenoliths, with their slightly different chemistry, suggest that, after the ancient depletion, the mantle went through a slight metasomatic event. A subsequent passage of mafic melts in the mantle, with similar compositions to the older andesitic magmatism of Poiana Ruscă, is recorded in the pyroxenites (Fe-rich xenoliths), whereas the megacrysts seem to be cogenetic with the host basanite. The Poiana Ruscă xenoliths differ from the orthopyroxene-enriched mantle xenoliths described previously from the Carpathian-Pannonian Region and from the Dacia block.

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Section: The Orthopyroxene-enrichment and Poikilitic Texture Formationmentioning

confidence: 99%

Section: The Orthopyroxene-enrichment and Poikilitic Texture Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Orthopyroxene-enrichment in the lherzolite-websterite xenolith suite from Paleogene alkali basalts of the Poiana Ruscă Mountains (Romania)

Nédli¹,

Szabó²,

Dégi³

2015

Geologica Carpathica

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A micro-scale investigation of melt production and extraction in the upper mantle based on silicate melt pockets in ultramafic xenoliths from the Bakony–Balaton Highland Volcanic Field (Western Hungary)

Bali

Zanetti

Szabó

et al. 2007

Contrib Mineral Petrol

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Insights into Li and Li isotope cycling and sub-arc metasomatism from veined mantle xenoliths, Kamchatka

Halama

Savov

Rudnick

et al. 2009

Contrib Mineral Petrol

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Supplementary Data, Table C: Representative electron microprobe analyses of clinopyroxenes and amphiboles from Avachinsky veined mantle xenoliths and temperatures calculated based on 2-pyroxene geothermometry (Brey and Köhler 1990) Sample # AVX-60v AVX-60v AVX-60v AVX-60v AVX-61v AVX-61v AVX-61v AVX-61v AVX-61v AVX-61v Sample type vein vein vein vein vein vein vein vein vein vein Mineral Cpx Cpx Cpx Cpx Cpx Cpx Cpx Cpx Amph Amph Analysis # 83 120 207n 212n 29 31 401n 404n 45 57 Major elements (wt.

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Remnants of boninitic melts in the upper mantle beneath the central Pannonian Basin?

Cited by 32 publications

References 52 publications

Orthopyroxene-enrichment in the lherzolite-websterite xenolith suite from Paleogene alkali basalts of the Poiana Ruscă Mountains (Romania)

Orthopyroxene-enrichment in the lherzolite-websterite xenolith suite from Paleogene alkali basalts of the Poiana Ruscă Mountains (Romania)

A micro-scale investigation of melt production and extraction in the upper mantle based on silicate melt pockets in ultramafic xenoliths from the Bakony–Balaton Highland Volcanic Field (Western Hungary)

Insights into Li and Li isotope cycling and sub-arc metasomatism from veined mantle xenoliths, Kamchatka

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