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Sahatany Pegmatite Field (Mt Ibity area), Vakinankaratra Region, Antananarivo Province, Madagascar

Mt. Bity area

Sahatany Pegmatite Field is situated ca 25 km SW of the town Antsirabe, and covers an area about 150 km2. This area is in older literature referred to as "Mt. Bity area" (for example in Am. Min. (1916) vol 1, 17-34.) More than 100 pegmatites of both beryl type LCT pegmatites and complex type LCT pegmatites are found in this area, and many of them has been worked for gem polychromatic tourmalines, rose beryl, spodumene, rose quartz etc. An inventory of the pegmatites is found in Rakotoarison, W. (1964). The pegmatites (age: panafrican event ca 550 MA) are hosted in a precambrian tectonic unit that is consisting mainly of schists, quartzites and marbles (série schisto-quartzo-dolomitique).

Mineral List

Mineral list contains entries from the region specified including sub-localities
Albite
var: Cleavelandite
Allanite-(Ce)
'Almandine-Spessartine Series'
Amesite
Anatase
'Apatite'
Arsenic
Ashanite
Autunite
Axinite-(Mn)
Baryte
Behierite (TL)
Beryl
var: Morganite
Biotite
Bismuth
Bismutite
Bityite (TL)
Brockite
Calcite
Cassiterite
Chevkinite-(Ce)
Chrysoberyl
Clinobisvanite
'Clinoptilolite'
Columbite
Columbite-(Fe)
Columbite-(Mn)
'Columbite-(Mn)-Tantalite-(Mn) series'
Cookeite
Danburite
Diopside
Dravite
Edenite
Elbaite
'Elbaite-Schorl Series'
Epidote
Euxenite-(Y)
'Feldspar Group'
Fluorapatite
var: Mn-bearing Fluorapatite

Fluorite
'Garnet'
Goethite
Grossular ?
Hambergite
Hematite
'Heulandite'
Hübnerite
Ixiolite
var: Wolframoixiolite
'K Feldspar'
Lepidolite
Liddicoatite
Lithiophilite
Londonite (TL)
'Londonite-Rhodizite Series'
Magnesiotaaffeite-2N’2S
Magnetite
Manandonite (TL)
Microcline
var: Amazonite
Microlite Group
var: Cesstibtantite
var: Uranmicrolite (of Hogarth 1977)
'Monazite'
Monazite-(Ce)
Montmorillonite
Muscovite
Opal
Palygorskite
Phenakite
Pollucite
'Psilomelane'
Pucherite
'Pyrochlore Supergroup'
var: Betafite (of Hogarth 1977)
Quartz
var: Amethyst
var: Chalcedony
var: Citrine
var: Rose Quartz
var: Smoky Quartz
Rhodizite
Rutile
var: Ilmenorutile
Scheelite
Schorl
Spessartine
Spinel
Spodumene
var: Kunzite
Talc
Tantalite
Tantalite-(Mn)
Topaz
'Tourmaline'
'var: Achroite'
'var: Rubellite'
Tremolite
Tsilaisite ?
Uranpyrochlore ?
Uvite
Vermiculite
Xenotime-(Y)
Zinnwaldite
Zircon
var: Hafnian Zircon
Zoisite


122 entries listed. 69 valid minerals. 4 type localities (valid minerals). 3 erroneous literature entries.

Localities in this Region

Madagascar
Madagascar

The above list 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

- Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84

- Lacroix, A. (1922-23): Mineralogie de Madagascar, Tome I-III. A. Challamel (Éditeur), Paris.

- Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39.

- Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de Doctorat de l`Universite Paul Sabatier, Toulouse.

- Lefevre, M. & Thomas, L. (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. Le Règne Minéral no 19, 15-28

- Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Norsk Bergverksmuseum Skrift. 25, 5-18 (in norwegian)

- Chrobak, L. (2010): General characteristics and mineral composition of selected pegmatites of Sahatany Valley (Madagascar). Abstract. 1st student's international geological conference. Polish Geological Society, Kraków 2010. 1 p.

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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