Donate now to keep mindat.org alive!Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
The most common minerals on earthMineral PhotographyThe Elements and their Minerals
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Anjanabonoina pegmatites, Ambohimanambola Commune, Betafo District, Vakinankaratra Region, Antananarivo Province, Madagascar

This page is currently not sponsored. Click here to sponsor this page.
 
Latitude & Longitude (WGS84): 19° 55' South , 46° 32' East
Latitude & Longitude (decimal): -19.91667,46.53333
Köppen climate type:Cwb : Subtropical highland climate or temperate oceanic climate with dry winters
Name(s) in local language(s):Anjanabonoina, Kaominina Ambohimanambola, Distrikan' i Betafo, Faritra Vakinankaratra, Faritanin' Antananarivo, Madagasikara


The Anjanabonoina pegmatites are famous for their large and multicolored tourmalines. Located 42 km WSW of the town Betafo in the central highland of Madagascar.

These pegmatite dikes outcrop at a hill (with an elevation of about 1,400 meters) 2,5 km east of Mount Ikaka and are emplaced in a complex environment characterized by paragneiss, marble and orthogneiss of the Neoproterozoic Itremo Group, of medium metamorphic grade. The subhorizontal bodies of pegmatite are strongly zoned. The metasedimentary rocks hosting the pegmatitic dikes locally show extensive contact-metasomatic phenomena. Abundant tourmalization extensively affected schist and quartzite units, with schorl-dravite replacing up to 30% of the rock volume. Veins of quartz, dravite-schorl and danburite are locally present in metasedimentary rocks close to the pegmatites, and marble is transformed into skarn (De Vito et al. 2006).

- Locality mispelled as "Anjanabonsana" in Lacroix (1909).

Mineral List

Mineral list contains entries from the region specified including sub-localities

29 valid minerals.

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

Mesoproterozoic
1000 - 1600 Ma



ID: 1383722
Mesoproterozoic sedimentary rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

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


Localities in this Region

Madagascar
  • Antananarivo Province
    • Vakinankaratra Region
      • Betafo District
        • Ambohimanambola Commune

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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Lacroix, A. (1908): Les minéraux des filons de pegmatite á tourmaline lithique de Madagascar. Bulletin de la Société Francaise de Minéralogie 31: 218- 247 [with notes on tourmaline from Anjanabonoina]
Lacroix, A. (1909): Sur la hambergite de Madagascar. Bulletin de la Société française de Minéralogie, Paris. 32, 320-324
Lacroix, A. (1922-23): Minéralogie de Madagascar. Tome I-III, A. Challamel (Éditeur), Paris.
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Switzer, G., Clarke jr, R.S, Sinkankas, J. and Worthing, H.W. (1965): Fluorine in hambergite. American Mineralogist 50: 85-95 [with analysis on hambergite from Anjanabonoina]
Bancroft, P.: Gem & Crystal Treasures. Published by Western Enterprises/Mineralogical Rercord, 488p. [On Anjanabononia : p 322-325]
Strunz, H. (1979): Anjanabonoina, Fundort schönnnnnnnster Tourmaline. Lapis: 4: 24-27, 47-48.
Wilson, W. E. (1984): What's new in Minerals ? Munich show 1983. Mineralogical Record 15: 118 [on a find of phenakite]
Wilson, W. E. (1989): The Anjanabonoina pegmatite, Madagascar. Mineralogical Record 20: 191-200
Pezzotta, F. (1999): Madagaskar- Da Paradies der Mineralien und Edelsteine. Extra Lapis 17. 56-59 (german version).
De Vito, C., Aurisicchio, C., Ferrini, V., and Pezzotta, F. (2002a): Nb-Ta oxides from Anjanabonoina pegmatite. International Mineral. Assoc. 18th General Meeting (Edinburgh), Program Abstract: 275.
De Vito, C., Aurisicchio, C., Ferrini, V., and Pezzotta, F. (2002b): Chemical composition and B, O and H isotopes of tourmaline from Anjanabonoina pegmatite. International Mineral. Association, 18th General Meeting (Edinburgh), Program Abstract: 208.
Dini, A., Tonarini, S., Pezzotta, F., and De Vito, C. (2002) Boron isotopes study of borates and boro-silicates from Anjanabonoina and Tetezantsio pegmatites (central Madagascar). International Mineral. Association, 18th General Meeting (Edinburgh), Program Abstract: 210.
Dirlam, D.M., Laurs, B.M., Pezzotta, F., and Simmons, W.B. (2002): Liddicoatite tourmaline from Anjanabonoina, Madagascar. Gems and Gemology: 38: 28-52.
De Vito, C., Pezzotta, F., Ferrini, V., and Aurisicchio, C. (2006): Nb-Ti-Ta oxides in the gem-mineralized and "hybrid" Anjanabonoina granitic pegmatite, central Madagascar: A record of magmatic and postmagmatic events. Canadian Mineralogist: 44: 87-103.
Ertl, A., Hughes, J. M., Prowatke, S., Ludwig, T., Prasad, P. S. R., Brandstätter, F., Körner, W., Schuster, R., Pertlik, F. and Marschall, H. (2006): Tetrahedrally coordinated boron in tourmalines from the liddicoatite-elbaite series from Madagascar: Structure, chemistry, and infrared spectroscopic studies. Am. Mineral. 91, 1847-1856. [both F-dominant]
Lussier, A. J., Abdu, Y., Hawthorne, F. C., Michaelis, V. K., Aguiar, P. M. and Kroeker, S. (2011): Oscillatory zoned liddicoatite from Anjanabonoina, central Madagascar. I. Crystal chemistry and structure by SREF and 11B and 27Al MAS NMR spectroscopy. Canadian Mineralogist 49, 63-88. [F-dominant]
Lussier, A. J. & Hawthorne, F. (2011): Oscillatory zoned liddicoatite from Anjanabonoina, central Madagascar. II. Compositional variation and mecanisms of substitution. Canadian Mineralogist 49, 89-103.

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 22, 2017 09:10:23
Go to top of page