User:GeoWriter/Sandbox5
From Wikipedia, the free encyclopedia
Analcimite
Analcimite is a type of igneous rock; it is a subvolcanic rock or an extrusive rock.[1] It is composed mostly of the minerals analcime and titanaugite. Analcimite is a type of foidite.[2] Varieties are olivine analcimite, leucocratic analcimite and augite analcimite.[3] Chemically, although analcime is a sodium aluminium silicate mineral, analcimite is a ???potassic??? or an ???ultrapotassic??? alkaline igneous rock.[4] It is ultramafic or mafic in the TAS classification (see TAS diagram).[5]
Analcimite forms lava flows[6] and volcanic plugs[7] as well as subvolcanic dykes[8] and sills.[9]
There is also basanitic-analcimite[10] - it occupies the same QAPF field as tephritic foidite. (Basanitic foidite has more than 10% CIPW normative olivine, tephritic foidite has less than 10%).
Examples
- near Si Lake, Marion County, Oregon[11]
- Bald Hill near Wallan, Victoria, Australia[12]
- near Santo Antônio da Barra, in southwestern Goiás, Brazil[13] - relict leucite crystals in this analcimite suggests it is actually altered leucitite.[14]
- Zákupy diatreme, Czech Republic[15]
- Trijebine, Serbia[16]
- near Cooktown, Queensland, Australia[17]
- Midland Valley of Scotland[18]
- Los Molinos, Cordoba Province, Argentina[19]
- near Meshkinshahr, Iran[20]
- Teic Dam, Iran[21]
- Tamazert, Morocco[22]
- Tubuai, French Polynesia[23]
- Makhtesh Ramon, Israel[24]
- Taiúva in the Bauru Basin of São Paulo (state), Brazil[25]
- Humphreys County, Mississippi[26]
- Ary-Dzhang in Arctic Siberia, Russia[27]
- Monroe Uplift, Arkansas[28]
- Spring Mountain volcanic plug near Glen Innes in NSW, Australia[29]
- Adrar, Mauritania[30]
- North Qilian Mountains, China[31] (leucite-analcimite)
See also
- Blairmorite – A leucocratic variety of analcimite
References
- Le Maitre, R.W. (editor) (2002). Igneous Rocks — A Classification and Glossary of Terms (2nd ed.). Cambridge: Cambridge University Press. p. 55. ISBN 0-521-66215-X.
{{cite book}}:|author=has generic name (help) - Conrey, Richard M. (1990). "Olivine analcimite in the Cascade Range of Oregon". Journal of Geophysical Research. 95 (B12): 19639. Bibcode:1990JGR....9519639C. doi:10.1029/JB095iB12p19639.
{{cite journal}}: CS1 maint: article number as page number (link) - Wilkinson, J. F. G. (1975). "An Al-spinel ultramafic-mafic inclusion suite and high pressure megacrysts in an analcimite and their bearing on basaltic magma fractionation at elevated pressures". Contributions to Mineralogy and Petrology. 53 (2): 71–104. Bibcode:1975CoMP...53...71W. doi:10.1007/BF00373125. S2CID 140684865.
- http://www.ppegeo.igc.usp.br 10663-12828-1-SM.pdf
- Cenozoic Volcanism in the Mediterranean Area edited by Luigi Beccaluva, Gianluca Bianchini, B. Marjorie Wilson - page 94 - on Google Books
- Morgan, W. R. (1968). "The geology and petrology of Cainozoic basaltic rocks in the Cooktown area, North Queensland". Journal of the Geological Society of Australia. 15 (1): 65–78. Bibcode:1968AuJES..15...65M. doi:10.1080/00167616808728681.
- Early Cretaceous Volcanism in Central and Eastern Argentina During Gondwana ... By Silvia Leonor Lagorio, Haroldo Vizán, Silvana Evangelina Geuna - page 23 - Google Books
- Woolley, A.R. (1987) Alkaline Rocks and Carbonatites of the World:Africa, page 189 - on Google Books
- "Geology and Resources of Aluminum", U.S. Geological Survey Professional Paper 1076, page C25
- Progress in Geology of China (1989-1992): Papers to 29th IGC