Quartzolite

Not to be confused with quartzite or silex.
Quartzolite at the Q vertex of the QAPF diagram for plutonic rocks

Quartzolite or silexite is an intrusive igneous rock, in which the mineral quartz is more than 90% of the rock's felsic mineral content, with feldspar at up to 10%.[1]: 135 [2] Typically, quartz forms more than 60% of the rock,[3] the rest being mostly feldspar although minor amounts of mica or amphibole may also be present.[2] Quartzolite occurs as dykes, sills, veins, bosses and segregation masses;[3][4] it is also found in association with greisen and pegmatite.[5][6][7] Quartzolite is an extremely rare type of rock.[8] No extrusive rock equivalent of quartzolite is known.[9]

  1. ^ Le Maitre, R. W. (editor) (2002). Igneous Rocks:A Classification and Glossary of Terms (2nd ed.). Cambridge: Cambridge University Press. ISBN 978-0-521-66215-4. {{cite book}}: |author= has generic name (help)
  2. ^ a b "Quartzolite". BGS Rock Classification Scheme. British Geological Survey. Retrieved 20 November 2016.
  3. ^ a b "Definition of silexite". mindat.org. Retrieved 20 November 2016.
  4. ^ Lishmund, S.R. (1974). "The Torrington silexite deposits". Geological Survey of New South Wales: Quarterly Notes. 17: 3–6.
  5. ^ Fraser, Dean (2013). "Ackley Mo-Sn-F-W" (PDF). Newfoundland & Labrador: Explore The Opportunities. Matty Mitchell Prospectors Resource Room. Retrieved 21 November 2016.
  6. ^ Klominsky, Josef; Fediuk, Ferry; Veselovsky, Frantisek; Schovanek, Pavel; Jarchovsky, Tomas; Taborsky, Zdenìk (2003). "Topazový Kvarcolit (Greisen) u Chrastavy v Severních Čechách Jako Metalogenetický Indikátor W-Sn Mineralizace" [Topaz quartzolite (greisen) near Chrastava in Northern Bohemia – metallogenic indicator of the W-Sn mineralization] (PDF). Zprávy o geologických výzkumech v roce (in Czech): 112–114. ISSN 0514-8057.
  7. ^ Zozulya, D.; Lyalina, L.; Macdonald, R.; Bagiński, B.; Savchenko, Y.; Jokubauskas, P. (2019). "Britholite Group Minerals from REE-Rich Lithologies of Keivy Alkali Granite—Nepheline Syenite Complex, Kola Peninsula, NW Russia". Minerals. 9 (12): 732. Bibcode:2019Mine....9..732Z. doi:10.3390/min9120732.
  8. ^ Gillespie, M.R.; Styles, M.T. (1999). "BGS Rock Classification Scheme, Volume 1: Classification of igneous rocks". British Geological Survey. p. 10. Retrieved 19 November 2016.
  9. ^ Schumann, Walter (1993). Handbook of Rocks, Minerals, and Gemstones. Boston: Houghton-Mifflin Company. p. 198. ISBN 978-0-395-51138-1.