Variation in Nb / Ta during differentiation of phonolitic magma, Tenerife, Canary Islands

Details Variation in Nb / Ta during differentiation of phonolitic magma, Tenerife, Canary Islands Variation in Nb / Ta during differentiation of phonolitic magma, Tenerife, Canary Islands

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.1345w&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 48, Issue 6, pp.1345-1348

Physics

6

Scientific paper

Variation in Nb / Ta ratio through a suite of phonolitic volcanics is
reported. Sphene, a phenocryst mineral, shows preferential incorporation
of Ta relative to Mb, consistent with the bulk rock variation, where Nb
/ Ta increases with fractionation. Nb in these magmas may be partly
present in the Nb 3+ state.

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