Quartzolite
Quartzolite or silexite is an
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]
Synonyms
The use of the synonym "silexite" is discouraged because it is the French word for chert, which is a sedimentary rock.[10] Other less common synonyms are "igneous quartz" and "peracidite".[11]
Examples
- Chrastava, Czech Republic[6]
- Crag Mountain, Northfield, Massachusetts, United States[1]: 118
- Jabal Hamra, Saudi Arabia[12]
- Keivy, Kola Peninsula, Russia[7]
- Lyon Mountain quadrangle, New York state, United States[13]
- Moulting Pond, Newfoundland, Canada[5]
- Qiabukanzhuota, China[14]
- Saveh County, Iran[15]
- Smaaland Cove, South Georgia[16]: 19
- South Mountains, Arizona, United States[17]
- Torrington, New South Wales, Australia[18]
Formation
Some occurrences of quartzolite are unlikely to have an entirely igneous origin;NSW, are believed to have formed in different ways. One type forms dykes and sills in the granite and in the surrounding metamorphic rocks. The other type has remnants of an earlier granite texture and is found on the outer edges of part of the pluton.[19]
References
- ^ )
- ^ a b "Quartzolite". BGS Rock Classification Scheme. British Geological Survey. Retrieved 20 November 2016.
- ^ a b "Definition of silexite". mindat.org. Retrieved 20 November 2016.
- ^ Lishmund, S.R. (1974). "The Torrington silexite deposits". Geological Survey of New South Wales: Quarterly Notes. 17: 3–6.
- ^ a b Fraser, Dean (2013). "Ackley Mo-Sn-F-W" (PDF). Newfoundland & Labrador: Explore The Opportunities. Matty Mitchell Prospectors Resource Room. Retrieved 21 November 2016.
- ^ ISSN 0514-8057.
- ^ .
- ^ a b 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.
- ISBN 978-0-395-51138-1.
- )
- ISBN 978-3-540-72795-8.
- .
- doi:10.1086/622638.
- .
- ISSN 2077-3528.
- ^ Mair, B.F. (1987). "The Geology of South Georgia: VI. Larsen Harbour Formation". British Antarctic Survey Scientific Reports. 111: 1–60.
- Bibcode:2009AGUFM.T33A1859G
- NSWDepartment of Primary Industries. Retrieved 23 November 2016.
- ^ Skinner, Mike (2015). "The Torrington Project" (PDF). Top Tung. Retrieved 23 November 2016.