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Gregoryite from
Ol Doinyo Lengai, Ngorongoro District, Arusha region, Tanzania


Locality type:Volcano
Classification
Species:Gregoryite
Formula:(Na2,K2,Ca)CO3
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Nyerereite5 photos of Gregoryite associated with Nyerereite at this locality.
Data
Mineral Data:Click here to view Gregoryite data
Locality Data:Click here to view Ol Doinyo Lengai, Ngorongoro District, Arusha region, Tanzania
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:91388
Long-form Identifier:1:3:91388:3
GUID (UUID V4):a4d56f2d-63a5-4b92-8480-c4c2bda54f2e
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
Printed in Great Britain ACTIVITY OF OL DOINYO LENGAI VOLCANO, TANZANIA, 1983--1987 Celia Nyamweru Department...Abstract--01 Doinyo Lengai volcano lies on the floor of the Rift Valley in Northern Tanzania. I t has been...bout 300 m e t r e s in d i a m e t e r . Ol Doinyo Lengai is n o t e w o r t h y not only be c a us...this r e l a t i o n s h i p have not y et O1 Doinyo Lengai is the only a c t i v e volcano in t he G r...very l i t t l e i n f o r m a t i o n on 01 Doinyo Lengai, though the volcano has been c l i m b e d and
Journal (article/letter/editorial)
significance of natrocarbonatites at Oldoinyo Lengai, Tanzania: Composition of lavas from 1988 to 2007”☆...Available online 27 August 2012 Keywords: Oldoinyo Lengai Natrocarbonatite Average composition and compositional...compositional variation Nyerereite and gregoryite phenocrysts Liquid immiscibility Peralkaline nephelinite...Oldoinyo Lengai, Tanzania, are unique in magmatic petrology. The historical activity of Oldoinyo Lengai has...relationship to the silicate magmas of Oldoinyo Lengai. The “type” natrocarbonatite major and trace element
Journal (article/letter/editorial)
significance of natrocarbonatites at Oldoinyo Lengai, Tanzania: Composition of lavas from 1988 to 2007 J...Available online 1 June 2012 Keywords: Oldoinyo Lengai Natrocarbonatite Average composition and compositional...compositional variation Nyerereite and gregoryite phenocrysts Liquid immiscibility Peralkaline nephelinite...Oldoinyo Lengai, Tanzania, are unique in magmatic petrology. The historical activity of Oldoinyo Lengai has...relationship to the silicate magmas of Oldoinyo Lengai. The “type” natrocarbonatite major and trace element
Journal (article/letter/editorial)
forsterite–phlogopite ijolites at Oldoinyo Lengai Volcano, Tanzania: study of melt inclusions V.S. Sekisova...inclusions in minerals of ijolite xenoliths at Oldoinyo Lengai Volcano. Melt inclusions with different phase compositions...aggregate of Na–Ca-carbonates (nyerereite and gregoryite). Fluorapatite contains primary carbonate-rich...inclusions in the core, which consist of nyerereite, gregoryite, thenardite, witherite, fluorite, villiaumite...ijolite; nyerereite; natrocarbonatite; Oldoinyo Lengai Introduction The East African Rift System, expanding
Report (chapter)
Uganda; Songhor and Koru, Kenya; and Laetoli, Tanzania. Some, and perhaps most, of the carbonatite ash...carbonatite eruptions were from O1 Doinyo Lengai, in northern Tanzania (Fig. 1), which has discharged both...fairchildite [K2Ca(CO3)2] in solid solution, and gregoryite, which is Na2CO3 with some CaCO3 in solid solution... ~" ' ~" "~'" .,~ "~"'",~ Tanzania . 2o - .x" ~ . . Oldoinyo Lengai Olduvai G o r g e * ~ '~-~...carbonatite volcanic rocks of Kerimasi volcano in Tanzania (Hay 1983) and the Tinderet centre in Kenya (Deans
Journal (article/letter/editorial)
com/locate/chemgeo Halogens (F, Cl and Br) at Oldoinyo Lengai volcano (Tanzania): Effects of magmatic differentiation...Natrocarbonatite Halogen fractionation Bromine TXRF Oldoinyo Lengai Leaching a b s t r a c t Halogen abundances of...and their alteration products from Oldoinyo Lengai (Tanzania) are compared to those of associated silicate...Cl- and Br-bearing minerals (mainly sylvite and gregoryite) are easily dissolved, leaving behind residual...alteration. In the associated silicate rocks at Oldoinyo Lengai concentrations of all three halogens increase from
Journal (article/letter/editorial)
K)2Ca(CO3)2] and gregoryite [(Na,K,Cax)2–x(CO3)], known from Ol Doinyo Lengai volcano (Tanzania). A refinement...(<600°C) natrocarbonatitic lavas from Ol Doinyo Lengai, Tanzania that contain 38–40 wt.% combined Na2O...Roberts 1984; Zaitsev et al. 2013); Kerimasi, Tanzania (Hay 1983; Zaitsev 2010; Guzmics et al. 2011);... PARADIS 2010) to very recent (e.g. Ol Doinyo Lengai, Tanzania, which is considered an active volcano)... Carbonatites with mineralogy similar to Ol Doinyo Lengai natrocarbonatite may have been relatively
Journal (article/letter/editorial)
(Russia), and natrocarbonatite in the Ol Doinyo Lengai volcano (Tanzania) mainly consisting of Na-K-Ca carbonates...such as nyerereite [(Na, K)2 Ca(CO3 )2 ] and gregoryite [(Na, K, Cax )2−x (CO3 )] [12,18,19]. Recent...calcite/dolomite carbonatite. fenite mainly consists Region [61,62]. The ore-forming is extremely complex,...carbonatite, such as Oldoinyo Lengai sodic carbonatite in northern Tanzania [19,57,58]. However, carbonatites...grassland, Baotou City, Inner Mongolia Autonomous Region [61,62]. The ore-forming process is extremely complex
Report (volume)
Chad, Ethiopia, Kenya, Malawi, Nigeria, Sudan, Tanzania and Uganda. However, in the last few years there...Depth to metamorphic basement in the Koobi Fora region from seismic and gravity data. 75 Watkins, R.T...record of Pleistocene deposits, Lake Natron basin, Tanzania... Bonnefille, G. & R„ Tiercelin, Sedimentation...countries—Chad, Eth¬ iopia, Kenya, Malawi, Nigeria, Sudan, Tanzania and Uganda. Geographical representation is very...waterfall dams and in rivers. There is thus no region of the world to match African lakes for the study
Report (volume)
Carbonatite lava flow from an eruption of Oldoinyo Lengai, Tanzania. Photo courtesy of Tobias Fischer. Series...more than 10,000 prospectors to the semi-desert region, and inevitably led to the recognition of diamond...Coal Mine 45, Kopeisk, Urals R3 Is River, Isovsky District, Urals C C I, To MCo CoF Pla I M M N, Ta Pla...Luobusha ophiolite complex, Autonomous Tibetan Region; (2) within the Mengyin kimberlite field, Linyi...three carbides that are unknown from any other region: qusongite (WC; Fang et al. 2009; Shi et al. 2009)
Book
differentiation 51 rocks Differentiation in wholly ol The diversity of magmatic liquid magmas Fractional...rocks 121 124 126 129 129 Contents Chapter 7 (ol Nad) General statement Textures and modal TS Geochemistry... Guttard studied the rocks of the Auvergne region of central France and recognized many recently...work (1894-1933) on the igneous rocks of the Oslo region of Norway; (b) the publication in 1895 of Alfred...uniquely able to provide substantial data about the region where they originated. The term primary magma should
Book (volume)
volume and quality of gemstones being mined in that region. As new localities are identified and new gemstones...localities or gemstones may lose their appeal or a region may become unproductive – so the market can be...mineral zoisite), which was discovered in 1967 in Tanzania and is now available through many retail outlets...of Afghanistan, the Sverdlovsk region of the Urals, and the Altai region of north-western China. Gems formed...sapphires (Mogok), Pakistan rubies (Hunza Mountains), Tanzania rubies (Morogoro), and Vietnam rubies (Luc Yen
 
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