Rare earth element content in the Szentbékkála series of peridotite inclusions

The genetic relations of four nonfrequent xenolith inclusion groups (dunite, layered lherzolite, websteriteandspinel-pyroxenite) to the hypothetical mantle sourcespinel-lherzolite(themostfrequent inclusion) and to the host alkali basalts have been investigated. The concentrations of rare-earth eleme...

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Bibliographic Details
Main Authors: Bérczi Szaniszló
Bérczi János
Format: Article
Published: University of Szeged, Department of Mineralogy, Geochemistry and Petrology Szeged 1986
Series:Acta mineralogica-petrographica 28
Kulcsszavak:Kőzettan, Ásványtan, Földtan
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Online Access:http://acta.bibl.u-szeged.hu/24749
Description
Summary:The genetic relations of four nonfrequent xenolith inclusion groups (dunite, layered lherzolite, websteriteandspinel-pyroxenite) to the hypothetical mantle sourcespinel-lherzolite(themostfrequent inclusion) and to the host alkali basalts have been investigated. The concentrations of rare-earth elements (REE) in the basalts, in the peridotite inclusions and in the mineral separates of spinellherzolites and spinel-pyroxenites were determined by instrumental neutron activation analysis. The REE abundance patterns of peridotite inclusions show increasing REE concentrations in the order: dunite, spinel-lherzolite, layered lherzolite, websterite and spinel-pyroxenite. Except spinelpyroxenite this series of inclusions represents a gradation from depleted (the former two groups) to enriched (the later two groups) remnants of source mantle material. The enrichment of REE in spinel-pyroxenites and alkali basalts are in accord with their 17 percent and 3 percent partial melting from a chondritic mantle source. On the basis of our REE concentration measurements on alkali basalts containing peridotite inclusions (Szigliget, Szentbékkálla, Kapolcs) we suggest the introduction of a new group, the peridotite inclusion containing basalt group into GY . PANTÓ'S classification of Hungarian basalts.
Physical Description:61-74
ISSN:0365-8066