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Geology of Ore Deposits

, Volume 52, Issue 8, pp 725–735 | Cite as

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

  • O. S. Yakovleva
  • I. V. PekovEmail author
  • L. Horváth
  • I. A. Bryzgalov
  • V. O. Yapaskurt
  • E. V. Guseva
Article

Abstract

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.

Keywords

Chromite Corundum Nepheline Siderite Ankerite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • O. S. Yakovleva
    • 1
  • I. V. Pekov
    • 1
    • 2
    Email author
  • L. Horváth
    • 3
  • I. A. Bryzgalov
    • 1
  • V. O. Yapaskurt
    • 1
  • E. V. Guseva
    • 1
  1. 1.Faculty of GeologyMoscow State UniversityMoscowRussia
  2. 2.Institute of Geochemistry and Analytical ChemistryRussian Academy of SciencesMoscowRussia
  3. 3.Hudson HeightsCanada

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