Anorthosite (from fr. Anorthose - plagioclase) is a magmatic plutonic basic normal alkaline rock of the gabbroid family . As a rule, it has a dense, massive texture, the color varies from light gray to almost black.. It consists mainly of primary and medium plagioclase ( Labrador , bitovnita , anorthite ). In addition to plagioclase, orthopyroxene, clinopyroxene, olivine , ilmenite , titanomagnetite and other minerals are often found in anorthosites. . Usually has a large and giant grain structure .
| Anorthosite | |
|---|---|
 Anorthosite from Poland | |
| Scientific classification | |
| Rock | |
| Type of: | Magmatic |
| Class: | Plutonic |
| Squad: | Basic |
| Suborder: | Normal alkaline |
| Family: | Gabbroids |
| View: | Anorthosite |
| Material composition | |
Most of the major anorthositic complexes of the Earth were formed over 1 billion years ago ( Ukraine , Canada , Finland ), often together with granites, rapakivi. They are also part of stratified intrusions of the main-ultrabasic composition ( South Africa , Australia , Canada and others) . Deposits of titanium , chromium , and platinoids are associated with anorthosite magmatic complexes. . A known and common type of anorthosite is labradorite. . Labradorites iridescent in blue and blue tones are widely used as a facing and decorative ornamental stone. .
Anorthosites are one of the main rocks that make up part of the lunar surface "lunar continents" .
Content
Etymology
The breed is named for the French word anorthose - plagioclase.
Study History
In the USSR and Russia, the largest researcher of anorthosites is the scientist, academician of the Russian Academy of Sciences O. A. Bogatikov . In 1975, he defended his thesis for the degree of Doctor of Geological and Mineralogical Sciences on the topic "Anorthosites of the USSR." In 1979, the scientist prepared and published the fundamental monograph “Anorthosites” .
Genesis
Moon Anorthosites
Anorthosite was found on the moon during the mission of the Apollo 15 spacecraft.
Mineral composition and sequence of crystallization
Structural features
Petrochemical composition
Physical Properties
Texture Features
Varieties
Body morphology
Norway , Rogaland , Jibbeheia Province
Formation affiliation
Metallogenic specialization
Prevalence
Anorthosite from Finland
( Baltic Shield )Anorthosite from Norway
Practical value
Notes
Literature
- Anorthosite-rapakvigranitny formation: East-European platform [Sb. ] / Ed. F. P. Mitrofanova. - L .: Science , 1978. - 295 p.
- Anorthosites of the Earth and the Moon [Coll. ] / Ed. A.V. Peive . - M .: Science , 1984. - 272 p. - (Proceedings GIN: vol. 375).
- Anorthosites of the USSR [Coll. ] / Ed. O. A. Bogatikova . - M .: Science , 1979. - 121 p.
- Bogatikov O. A. Anorthosites / Otv. ed. V.A. Kononova. - M .: Science , 1979. - 231 p.
- Egorov O.S. Geochemistry of gabbroids of folded regions / Edited by N. P. Shcherbak. - K .: Naukova Dumka, 1977. - 180 p.
- Yoder G.S., Tilly K.-E. The origin of basalt magmas / Per. from English G. Η. Mukhitdinova; by ed. and with foreword. V. S. Sobolev. - M .: Mir , 1965. - 246 p.
- Igneous rocks in six volumes [Sat. ] / Ed. O. A. Bogatikova . - M .: Science , 1983. - V. 1: Classification, nomenclature, petrography. - 768 s. - 2600 copies
- Igneous rocks in six volumes [Sat. ] / Ed. O. A. Bogatikova . - M .: Science , 1985. - V. 3: The main breed. - 488 s. - 2050 copies
- Petrogenesis of nickel-bearing gabbroid intrusions of the Volyn megablock of the Ukrainian shield [Sb. ] / Edited by N. P. Scherbak. - K .: Naukova Dumka, 1991. - 138 p.
- Petrographic Code of Russia: Magmatic, Metamorphic, Metasomatic, Impact Formations / Ed. O. A. Bogatikova , O. V. Petrova, A. F. Morozova; rep. ed. L.V. Sharpyonok. - 3rd ed., Corr. and additional .. - SPb. : VSEGEI , 2009. - 200 p. - 500 copies
- Polkanov A. A. Pluto gabbro-labradorites Volyn USSR, Ed. Yu. A. Kuznetsova. - L .: Publishing House of Leningrad State University , 1948. - 80 p.
- Petrology problems of ultrabasic and basic rocks [Coll. ] / Ed. Yu. A. Kuznetsova. - M .: Science, 1972. - 312 p.
- Titaniferous gabbroanorthosite massifs [Sb. ] / Comp. L. A. Kudinova, S. V. Metalidi. - M .: Nedra, 1987. - 136 p.
- Yudin B. A. Gabbro-labradorite formation of the Kola Peninsula and its metallogeny / Ed. Yu. A. Kuznetsova. - L .: Science, 1980. - 168 p.
Links
- Anorthosite // Great Soviet Encyclopedia : [in 30 t.] / Ch. ed. A. M. Prokhorov . - 3rd ed. - M .: Soviet Encyclopedia, 1969-1978.
- Anorthosite // Geological Dictionary: In two volumes / Ed. KN Paffenholz and others - M .: Nedra, 1978. - T. 1.
- GeoWiki article
- An article in the Mountain Encyclopedia