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Antandrokomby pegmatite, Manandona Valley, Sahatany Pegmatite Field (Mt Ibity area), Vakinankaratra Region, Antananarivo Province, Madagascar
Photo: sergio varvello
The pegmatite is a steeply dipping dike which measures 350 m x 1,2 meter.
NOTES on the mineral list:
- Some londonite-rhodizite specimens from the Antsongombato gem mine were sold as coming from Antandrokomby.
- Nizamoff et al. (2000) and Webber et al (2002) has shown that tourmalines from the miarolitic cavities at the Antandrokomby are members of the elbaite- schorl series with significant Mg and Ca content, and not liddicoatite.
Mineral List
42 entries listed. 28 valid minerals. 2 type localities (valid minerals). 1 erroneous literature entry.
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References
- Dabren A. (1906): Sur quelques pierres précieuses de Madagascar. Bulletin de L'Academie malgache. Tananarive, 4:132-137 [First find of spodumen from Antandrokomby]
- Lacroix, A. (1908): Les minéraux des filons de pegmatite á tourmaline lithique de Madagascar. Bulletin de la Société Francaise de Minéralogie 31: 218- 247
- Duparc, L., Wunder, M., Sabot, R. (1910): Les minéraux des pegmatites des environs d´Antsirabe á Madagscar. Mémoires de la Société de Physique et d'Histoire Naturelle de Geneve, 36, 3, 283-407
- Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84 [on danburite and rhodizite]
- Lacroix, A. (1912): Sur une nouvelle espèce minérale (manandonite) des pegmatites de Madagascar. Bulletin de la Société française de Minéralogie, 35, 223-226
- Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. 624p.
- Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
- Ranorosoa, N. , Fontan, F. & Fransolet, A-M. (1989): Rediscovery of manandonite in the Sahatany Valley, Madagascar. European Journal of Mineralogy 1, 633-638
- Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de doctorat de L'Universite Paul Sabatier, Toulouse
- Zheng, H. & Bailey, S.W. (1995): The crystal structure of manandonite-2H2. American Mineralogist. 80: 387-393.
- Pezzotta F., Falster A.U., Simmons W.B. & Webber K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.
- Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. Extra Lapis nr 17, pp 53-54 [german edition]
- Nizamoff, J.W.; Falster, A.U.; Pezzota, F. ; Simmons, W.B.; Hanson, S.L. and Webber, K.L. (2000): Recent mining at the Antandrokomby pegmatite, Madagascar. 26th Rochester Mineralogical Symposium. Rocks & Minerals, july 2000.
- Nizamoff, J. W.; Falster, A. U.; Pezzota, F.; Simmons, W. B. and Webber, K. L. (2000): Geochemical variation in tourmaline from Antandrokomby, Madagascar. 26th Rochester Mineralogical Symposium. Rocks & Minerals, july 2000.
- Simmons, W. B; Pezzotta, F; Falster, A.U & Webber, K. L. (2001): Londonite, a new mineral species: The Cs-dominant analogue of Rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist 39: 747-755
- Simmons, W.B., Webber, K.L., Falster, A.U., & Nizamoff, J. W. (2001): Gem tourmaline chemistry and paragenesis. Australian gemmologist 21, number 01.
- - Webber, K. L. Siimmons, W. B & Falster, A. U. (2002): Tourmaline from the Antandrokomby and Fianarantsoa Pegmatites, Madagascar. Mineralogical Record 33: 82
- Pezzotta, F.; Diella, V. & Demartin, F. (2003): Londonit aus Madagaskar- eine neue Mineralart. Lapis 35 (2), 35-38
- Lacroix, A. (1908): Les minéraux des filons de pegmatite á tourmaline lithique de Madagascar. Bulletin de la Société Francaise de Minéralogie 31: 218- 247
- Duparc, L., Wunder, M., Sabot, R. (1910): Les minéraux des pegmatites des environs d´Antsirabe á Madagscar. Mémoires de la Société de Physique et d'Histoire Naturelle de Geneve, 36, 3, 283-407
- Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84 [on danburite and rhodizite]
- Lacroix, A. (1912): Sur une nouvelle espèce minérale (manandonite) des pegmatites de Madagascar. Bulletin de la Société française de Minéralogie, 35, 223-226
- Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. 624p.
- Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
- Ranorosoa, N. , Fontan, F. & Fransolet, A-M. (1989): Rediscovery of manandonite in the Sahatany Valley, Madagascar. European Journal of Mineralogy 1, 633-638
- Ranorosoa, N. (1986): Etude mineralogique des pegmatites du champ de la Sahatany, Madagascar. These de doctorat de L'Universite Paul Sabatier, Toulouse
- Zheng, H. & Bailey, S.W. (1995): The crystal structure of manandonite-2H2. American Mineralogist. 80: 387-393.
- Pezzotta F., Falster A.U., Simmons W.B. & Webber K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.
- Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. Extra Lapis nr 17, pp 53-54 [german edition]
- Nizamoff, J.W.; Falster, A.U.; Pezzota, F. ; Simmons, W.B.; Hanson, S.L. and Webber, K.L. (2000): Recent mining at the Antandrokomby pegmatite, Madagascar. 26th Rochester Mineralogical Symposium. Rocks & Minerals, july 2000.
- Nizamoff, J. W.; Falster, A. U.; Pezzota, F.; Simmons, W. B. and Webber, K. L. (2000): Geochemical variation in tourmaline from Antandrokomby, Madagascar. 26th Rochester Mineralogical Symposium. Rocks & Minerals, july 2000.
- Simmons, W. B; Pezzotta, F; Falster, A.U & Webber, K. L. (2001): Londonite, a new mineral species: The Cs-dominant analogue of Rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist 39: 747-755
- Simmons, W.B., Webber, K.L., Falster, A.U., & Nizamoff, J. W. (2001): Gem tourmaline chemistry and paragenesis. Australian gemmologist 21, number 01.
- - Webber, K. L. Siimmons, W. B & Falster, A. U. (2002): Tourmaline from the Antandrokomby and Fianarantsoa Pegmatites, Madagascar. Mineralogical Record 33: 82
- Pezzotta, F.; Diella, V. & Demartin, F. (2003): Londonit aus Madagaskar- eine neue Mineralart. Lapis 35 (2), 35-38
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