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Vol 239
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Composition Heterogeneity of Xenoliths of Mantle Peridotites from Alkaline Basalts of the Sverre Volcano, the Svalbard Archipelago

S. G. Skublov1
D. S. Ashikhmin2
About authors
  • 1 — Institute of Precambrian Geology and Geochronology RAS
  • 2 — A.P.Karpinsky Russian Geological Research Institute
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The article presents the results of a study of the composition of xenoliths of mantle peridotites (seven samples), collected from the Quaternary basalts of the Sverre volcano, the Svalbard archipelago. The presence of two big (more than 15 cm in diameter) xenoliths of spinel lherzolite allowed us to consider a change in their composition in the cen- tral, intermediate, and marginal parts of the samples. It is proposed to distinguish three types of xenoliths by the distribution of trace and rare earth elements. Enrich- ment of mantle peridotites with light rare earth elements, as well as high field strength (HFS)   and large-ion lithophile (LIL) elements, is presumably associated with mantle metasomatism.

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