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Ploskaya Mt, Western Keivy Massif, Keivy Mountains, Murmanskaya Oblast', Northern Region, Russia

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Latitude & Longitude (WGS84): 67° 37' 59'' North , 36° 42' 0'' East
Latitude & Longitude (decimal): 67.63333,36.70000
Other regions containing this locality:Kola Peninsula, Murmanskaya Oblast', Northern Region, Russia
Soviet Union (1922-1991)
Köppen climate type:Dfc : Subarctic climate
Name(s) in local language(s):Гора Плоская, Западные Кейвы, Кейвы, Кольский полуостров, Ловозерский район, Мурманская область
Other/historical region names associated with this locality:Murmanskaja Oblast'; Murmansk Oblast


Amazonite pegmatites with rare Y and Yb minerals at Ploskaya Mountain, situated 2,5 km west of Vyuntspakhk Mt., about 80 km east of Lovozero village and 34 km NNW of Krasnoshchelye settlement.

In 1955, fragments of amazonite pegmatite with gadolinite were discovered in this area. Prospecting works performed during the summer 1956 evidenced various amazonite-bearing pegmatite dykes, including the giant dyke also known as vein No. 19 or Ploskogorskoe deposit (now considered the largest semi-precious amazonite deposit in the world). This 220-m-long vein, ranging in thickness from 8 to 25 m, is located on the western slope of the mountain and consists of quartz, quartz-amazonite-albite, and amazonite zones. The thickness of blocky amazonite zones in the dyke range from 2 to 8 m. Microcline (amazonite) is the main mineral, often intergrown with albite in the form of perthite. Amazonite forms crystals and blocks from 10 cm to 2 m across, varying in colour from blue, greenish-blue to green and grass-green. Quartz, albite, and zinnwaldite are typical rock-forming minerals of the vein; accessory minerals include zircon, fergusonite-(Y), columbite-(Mn), yttrofluorite, and many others.


Plosakaya Mt. is the type locality for hingganite-(Yb) and keiviite-(Yb), two of the few minerals with essential ytterbium; it was the type locality for fluorthalénite (Voloshin & Pakhomovskii, 1997), a species discredited by IMA in 2014 (IMA 14-D) because thalénite-(Y) has been redefined as a F-dominant species.

Mineral List


53 valid minerals. 6 (TL) - type locality of valid minerals. 1 (FRL) - first recorded locality of unapproved mineral/variety/etc.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleoproterozoic
1600 - 2500 Ma



ID: 629422
Sedimentary; Clastic: continental

Age: Proterozoic (1600 - 2500 Ma)

Description: Northern Europe, Svecofennian and Lapland-Kola orogens

Comments: Orogen, fold-thrust belt, folded region; Koistinen et al., 2001; Sigmond, 2002; Solli, unpublished compilation, 2007-08; Bergman et al., unpublished revisions, 2007-08

Lithology: Quartzite, sericite schist, meta-arkose, kyanite-staurolite schist

Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. [2]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

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Ostroumov M.N., Musina I.M., Vokhmentsev A.Ya. [Остроумов М.Н., Мусина И.М., Вохменцев А.Я.] (1975): Colour variation and perthitic texture of amazonite from the pegmatite of Ploskaya Mountain (Kola Peninsula) [Вариация окраски и пертитовое строение амазонита из пегматита горы Плоской (Кольский п-ов)]. Zap. VMO [Зап. ВМО], 104, 6, 738-741 (in Russian).
Voloshin A.V., Bukanov V.V., Polezhaeva L.I. [Волошин А.В., Буканов В.В., Полежаева Л.И.] (1981): Plumbomicrolite and plumbopyrochlore from amazonite pegmatites of the Kola Peninsula [Плюмбомикролит и плюмбопирохлор из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 3, 5. 20-34 (in Russian).
Stepanov V.I., Bukanov V.V., Bykova A.V. [Степанов В.И., Буканов В.В., Быкова А.В.] (1982): Plumbomicrolite from amazonite pegmatite of Ploskaya Mountain - first find in USSR [Плюмбомикролит из амазонитового пегматита горы Плоской - первая находка в СССР]. Dokl. Akad. Nauk SSSR [Докл. Акад. Наук СССР], 263, 1, 183-185 (in Russian).
Kievlenko E.Ya., Senkevich N.N. [Киевленко Е.Я., Сенкевич Н.Н.] (1983): Geology of semi-preciuos stone deposits [Геология месторождений поделочных камней], 2nd edition. Nedra, Moskow, 263 pp. (in Russian).
Voloshin A.V., Pakhomovskii Ya.A., Men’shikov Yu.P., Povarennykh A.S., Matvienko E.N., Yakubovich O.V. [Волошин А.В., Пахомовский Я.А., Меньшиков Ю.П., Поваренных А.С., Матвиенко Е.Н., Якубович О.В.] (1983): Ytterbium hingganite - a new mineral from amazonite pegmatites of the Kola Peninsula [Хинганит иттербиевый - новый минерал из амазонитовых пегматитов Кольского полуострова]. Dokl. Akad. Nauk SSSR [Докл. Акад. Наук СССР], 270, 5, 1188-1192 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A., Men’shikov Yu.P., Povarennykh A.S., Rogachev D.L. [Волошин А.В., Пахомовский Я.А., Меньшиков Ю.П., Поваренных А.С., Рогачев Д.Л.] (1983): Vyuntspakhkite, Y4Al2AlSi5O18(OH)5 - a new yttrium-aluminium silicate from amazonite pegmatite of the Kola Peninsula [Вюнцпахкит, Y4Al2AlSi5O18(OH)5 - новый иттрий-алюминиевый силикат из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 5, 89-94 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A., Tyusheva F.N. [Волошин А.В., Пахомовский Я.А., Тюшева Ф.Н.] (1983): Keiviite, Yb2Si2O7 - a new ytterbium silicate from amazonite pegmatites of the Kola Peninsula [Кейвиит, Yb2Si2O7 - новый иттербиевый силикат из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 5, 94-99 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A., Tyusheva F.N. [Волошин А.В., Пахомовский Я.А., Тюшева Ф.Н.] (1985): Kevyite-(Y) - a new yttrium diorthosilicate, and thalénite from amazonite pegmatites of the Kola Peninsula. Diortho- and triorthosilicates of yttrium [Кейвиит-(Y) – новый иттриевый диортосиликат и таленит из амазонитовых пегматитов Кольского полуострова. Диорто- и триортосиликаты иттрия]. Min. Zhurnal [Мин. Журнал], 7, 79-94 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A. [Волошин А. В., Пахомовский Я. А.] (1986): Minerals and evolution of mineral formation in amazonite pegmatites of the Kola Peninsula [Минералы и эволюция минералообразования в амазонитовых пегматитах Кольского полуострова]. Nauka, Leningrad, 168 pp. (in Russian).
Voloshin A.V., Pakhomovskii Ya.A., Tyusheva F.N., Sokolova E.V., Egorov-Tismenko Yu.K. [Волошин А.В., Пахомовский Я.А., Тюшева Ф.Н., Соколова Е.В., Егоров-Тисменко Ю.К.] (1986): Kuliokite-(Y) - a new yttrium-aluminium fluorsilicate from amazonite pegmatites of the Kola Peninsula. [Кулиокит-(Y) - новый иттрий-алюминиевый фторсиликат из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 8, 94-99 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A., Zezulina E.P. [Волошин А.В., Пахомовский Я.А., Зезулина Е.П.] (1986): Caysichite from amazonite pegmatites of the Kola Peninsula [Кайсикхит из амазонитовых пегматитов Кольского полуострова]. Min. Zhurnal [Мин. Журнал], 8, 90-93 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A. [Волошин А.В., Пахомовский Я.А.] (1987): Iimoriite from amazonite pegmatites of the Kola Peninsula (first find in USSR) [Ииморит из амазонитовых пегматитов Кольского полуострова (первая находка в СССР)]. In: Belkov I.V. (Ed.), Mineralogical associations and minerals in the magmatic complexes of the Kola Peninsula [Белков И.В. (ред.), Минеральные ассоциации и минералы магматических комплексов Кольского полуострова]. Kola Branch, USSR Academy of Science Press [Изд. КолФАН СССР], Apatity, pages 34-42 (in Russian).
Vokhmentsev A.Ya., Ostroumov M.N., Marin Yu.B., Popov V.A., Tarashchan A.N., Shmakin B.M. [Вохменцев А.Я., Остроумов М.Н., Марин Ю.Б., Попов В.А., Таращан А.Н., Шмакин Б.М.] (1989): Amazonite [Амазонит]. Nedra, Moscow, 192 pp. (in Russian).
Belolipetskii A.P., Voloshin A.V. (1996): Yttrium and rare earth element minerals of the Kola Peninsula, Russia. In: Jones A.P., Wall F., Williams C.T. (Eds.), Rare Earth Minerals: Chemistry, Origin and Ore Deposits. Chapman & Hall, London, pages 311-326.
Voloshin A.V., Pakhomovskii Ya.A., Yakovenchuk V.N., Men'shikov Yu.P., Sokolova E.V., Egorov-Tismenko Yu.K. [Волошин А. В., Пахомовский Я. А., Яковенчук В. Н., Меньшиков Ю. П., Соколова Е. В., Егоров-Тисменко Ю. К.] (1996): Kamphaugite-(Y) and tengerite-(Y) from amazonite randpegmatites of the Kola Peninsula [Камфагит-(Y) и тенгерит-(Y) из амазонитовых рандпегматитов Кольского полуострова]. Zap. VMO [Зап. ВМО], 125, 1, 109-119 (in Russian).
Voloshin A.V., Pakhomovskii Ya.A. [Волошин А.В., Пахомовский Я.А.] (1997): Fluorthalénite-(Y), a new mineral from amazonite randpegmatites of the Kola Peninsula [Фторталенит-(Y) - новый минерал из амазонитовых рандпегматитов Кольского полуострова]. Dokl. RAN [Докл. РАН], 354, 1, 77-78 (in Russian).
Pekov I.V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Picture, Moscow, 369 pp.
Voloshin A.V., Lyalina L.M., Savchenko Ye.E., Bogdanova A.N. [Волошин А.В., Лялина Л.М., Савченко Е.Э., Богданова А.Н.] (2003): Formanite-(Y) from the amazonite randpegmatites of Western Keivy (Kola Peninsula) [Форманит-(Y) из амазонитовых рандпегматитов Западных Кейв (Кольский полуостров)]. Zap. RMO [Зап. РМО], 132, 1, 82-93 (in Russian).
Bindi L., Zoppi M., Bonazzi P. (2006): Plumbomicrolite from the Ploskaya Mountain, Keivy Massif, Kola Peninsula, Russia: composition and crystal structure. Per. Mineral., 75, 2-3, 51-58.
Pekov I.V., Chukanov N.V., Kononkova N.N., Yakubovich O.V., Massa W., Voloshin A.V. [Пеков И.В., Чуканов Н.В., Кононкова Н.Н., Якубович О.В., Масса В., Волошин А.В.] (2008): Tveitite-(Y) and rare-earth enriched fluorite from amazonite pegmatites of Western Keivy, Kola Peninsula, Russia. Genetic crystal-chemistry of natural Ca,REE-fluorides [Твейтит-(Y) и редкоземельные разновидности флюорита из амазонитовых пегматитов Западных Кейв, Кольский полуостров, Россия. Генетическая кристаллохимия природных Ca,REE-фторидов]. Zap. RMO [Зап. РМО], 137, 3, 76-93 (in Russian).
Atencio D., Andrade M.B., Christy A.G., Gieré R., Kartashov P.M. (2010): The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist, 48, 673-698.

External Links

http://geo.web.ru/druza/l-Ploskaya.htm A lot of photos (specimens from different collections) and maps (in Russian)

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