Mineralogy, geochemistry, and genesis of high-alumina fenites of the Mont Saint-Hilaire alkaline pluton, Québec, Canada


High-alumina fenites in the Mont Saint-Hilaire alkaline complex, Québec, Canada, form bodies at the contact of peralkaline nepheline syenite. Fenites are subdivided into four types: corundum-spessartine-biotite-feldspar, muscovite-corundum-hercynite-biotite-feldspar, carbonated muscovite-biotite-hercynite-feldspar, and spessartine-hercynite-feldspar. Accessory minerals of the ilmenite-pyrophanite series, columbites, zircon, thorite, pyrrhotite, Fe, Mn, Mg, Ca, Ba, and REE carbonates, uedaite-(Ce), etc. are identified. Three stages are suggested in the formation of these rocks. In mineralogy and geochemistry, the Mont Saint-Hilaire high-alumina fenites are similar to Al-rich fenites replacing xenoliths in the Khibiny alkaline complex, Russia. In both cases, fenites are related to peralkaline rocks and replace high-alumina protoliths: granite at Mont Saint-Hilaire and metapelites in the Khibiny Mountains. These fenites are regarded as a specific type of fenites with rock-forming Mg-depleted hercynite.

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Correspondence to I. V. Pekov.

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Original Russian Text © O.S. Yakovleva, I.V. Pekov, L. Horváth, I.A. Bryzgalov, V.O. Yapaskurt, E.V. Guseva, 2010, published in Zapiski RMO (Proceedings of the Russian Mineralogical Society), 2010, No. 2, pp. 15–31.

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Yakovleva, O.S., Pekov, I.V., Horváth, L. et al. Mineralogy, geochemistry, and genesis of high-alumina fenites of the Mont Saint-Hilaire alkaline pluton, Québec, Canada. Geol. Ore Deposits 52, 725–735 (2010). https://doi.org/10.1134/S1075701510080040

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  • Chromite
  • Corundum
  • Nepheline
  • Siderite
  • Ankerite