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

  • Ventura G
  • Bellatreccia F
  • Williams C
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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 A1 content (A1203 + Fe203 = 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.

Author-supplied keywords

  • alteration
  • chemistry
  • ree patterns
  • titanite
  • vico volcanic complex

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  • G. Della Ventura

  • F. Bellatreccia

  • C. T. Williams

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