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Zr- and LREE-rich titanite from Tre Croci, Vico Volcanic complex (Latium, Italy)

Published online by Cambridge University Press:  05 July 2018

G. Della Ventura ,
F. Bellatreccia  and
C. T. Williams
G. Della Ventura
Affiliation:
Dipartimento di Scienze Geologiche, Università di Roma Tre, Largo S. Leonardo Murialdo 1, 00146, Roma
F. Bellatreccia
Affiliation:
Dipartimento di Scienze Geologiche, Università di Roma Tre, Largo S. Leonardo Murialdo 1, 00146, Roma
C. T. Williams
Affiliation:
Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
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Abstract

Titanite occurs in the groundmass of a holocrystalline volcanic ejectum collected in the pyroclastic rocks of the Vico Volcanic complex at Tre Croci, near Viterbo, Italy. The host rock is composed of abundant K-feldspar and minor plagioclase, biotite, clinopyroxene and a feldspathoid (sodalite). Titanite is typically associated with zirconolite, biotite and Fe-oxides. It has a medium Al content (Al2O3 + Fe2O3 = 4–6 wt.%) and contains significant amounts of Zr and LREE, with a chondrite- normalised REE pattern similar to those of titanites from other alkaline rocks. Titanite has been corroded by fluids probably rich in dissolved F and P during a late alteration stage, with evidence for some remobilization and redistribution of the REE and actinide elements.

Keywords

Vico volcanic complextitanitechemistryREE patternsalteration
Type
Research Article
Information
Mineralogical Magazine , Volume 63 , Issue 1 , February 1999 , pp. 123 - 130
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

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