Petrogenesis and conditions of crystallization of Spanish lamproitic rocks

Gianpiero Venturelli*, Emma Salvioli Mariani, Stephen F. Foley, Silvio Capedri, Antony Crawford

*Corresponding author for this work

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The lamproitic rocks of southeast Spain (8. 6-6 Ma) occur mainly as dykes and plugs in the provinces of Murcia, Almeria and Albacete. Phlogopite, olivine, apatite, spinel, sanidine and glass are ubiquitous. Clinopyroxene, orthopyproxene, K-rich amphibole, biotite, ilmenite, pseudobrookite, leucite, analcime and carbonates may be additional phases. The magmas crystallized at temperatures below ca. 1200 degree C. The distribution of the high-valency ( greater than 3) elements was largely influenced by the heterogeneous distribution of accessory phases in the source and by the melt structure. The magmas were generated from an enriched mantle source containing phlogopite, orthopyroxene, olivine and accessory plates (e. g. , apatite).

Original languageEnglish
Pages (from-to)67-79
Number of pages13
JournalCanadian Mineralogist
Volume26
Issue numberpt 1
Publication statusPublished - Mar 1988
Externally publishedYes

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