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Ampatsikahitra pegmatites, Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascari
Regional Level Types
Ampatsikahitra pegmatitesPegmatite Field
Sahatany ValleyValley
IbityCommune
Antsirabe IIDistrict
VakinankaratraRegion
MadagascarCountry
Ampatsikahitra pegmatites, Sahatany Valley, Sahatany Pegmatite Field (Mt Ibity area), Madagascar

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Key
Latitude & Longitude (WGS84):
20° 3' 32'' South , 46° 56' 27'' East
Latitude & Longitude (decimal):
Locality type:
Other/historical names associated with this locality:
Ampasihiatra; Ampazikahitra
Other Languages:
Malagasy:
Fihadiam-bato ao Ampatsikahitra, Lohasahan'i Sahatany, Kaominin' Alatsinainy Ibity, Distrikan' Antsirabe II, Vakinankaratra, Madagasikara


This locality consists of three pegmatites of complex type LCT that has been worked for gem tourmalines and spodumene. It is situated NE of the village Samizaza and SW of Maharitra in the western part of the Sahatany Pegmatite Field, S of the town Antsirabe in the main highland of Madagascar.

The names "Ampasihiatra" and "Ampazikahitra" that the locality sometimes has referred to in literature, are misnomers (spelling mistakes).

Rakotoarison (1964) locality nr 21.

Regions containing this locality

Sahatany Pegmatite Field (Mt Ibity area), MadagascarPegmatite Field
Somali Plate (Somalia Plate)Tectonic Plate
Antananarivo Province, MadagascarProvince (Abolished)

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


9 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Lefevre, M. & Thomas, L. (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. Le Règne Minéral no 19, 15-28
Beryl
Formula: Be3Al2(Si6O18)
Reference: T. Praszkier photo, Photo ID: 217875
Cookeite
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Reference: Michel Arliguie collection & photo (Photo ID: 962637 , EX J. Behier specimen)
Elbaite
Formula: Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Lefevre, M. & Thomas, L. (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. Le Règne Minéral no 19, 15-28
'Feldspar Group'
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39.
Microcline
Formula: K(AlSi3O8)
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39
Microcline var: Amazonite
Formula: K(AlSi3O8)
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39
'Pyrochlore Supergroup'
Formula: A2-mD2X6-wZ1-n
Reference: Knut Edvard Larsen collection (MM-2023)
Quartz
Formula: SiO2
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39
Quartz var: Rock Crystal
Formula: SiO2
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
Quartz var: Rose Quartz
Formula: SiO2
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Lefevre, M. & Thomas, L. (1998): Les pegmatites de la vallée de la Sahatany, Madagascar. Le Règne Minéral no 19, 15-28 ; Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
Spodumene
Formula: LiAlSi2O6
Reference: Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84 ; Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
Spodumene var: Kunzite
Formula: LiAlSi2O6
Reference: Arliguie Michel collection & photo (Photo ID: 85907 )
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39
'Tourmaline var: Rubellite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, p.1-39

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
var: Rose Quartz4.DA.05SiO2
Group 9 - Silicates
Albite9.FA.35Na(AlSi3O8)
Beryl9.CJ.05Be3Al2(Si6O18)
Cookeite9.EC.55(Al2Li)Al2(AlSi3O10)(OH)8
Elbaite9.CK.05Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Microcline9.FA.30K(AlSi3O8)
var: Amazonite9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spodumene9.DA.30LiAlSi2O6
var: Kunzite9.DA.30LiAlSi2O6
Unclassified Minerals, Rocks, etc.
'Feldspar Group'-
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
'var: Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with borate groups
Elbaite61.3.1.8Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Spodumene65.1.4.1LiAlSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Cookeite71.4.1.2(Al2Li)Al2(AlSi3O10)(OH)8
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
'Feldspar Group'-
Microcline
var: Amazonite
-K(AlSi3O8)
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
Quartz
var: Rock Crystal
-SiO2
var: Rose Quartz-SiO2
Spodumene
var: Kunzite
-LiAlSi2O6
'Tourmaline'-A(D3)G6(Si6O18)(BO3)3X3Z
'var: Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
LiLithium
Li Spodumene (var: Kunzite)LiAlSi2O6
Li ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Li SpodumeneLiAlSi2O6
Li Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
B Tourmaline (var: Rubellite)A(D3)G6(T6O18)(BO3)3X3Z
B ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
O Tourmaline (var: Rubellite)A(D3)G6(T6O18)(BO3)3X3Z
O Spodumene (var: Kunzite)LiAlSi2O6
O QuartzSiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O Microcline (var: Amazonite)K(AlSi3O8)
O AlbiteNa(AlSi3O8)
O ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O BerylBe3Al2(Si6O18)
O SpodumeneLiAlSi2O6
O MicroclineK(AlSi3O8)
O Quartz (var: Rose Quartz)SiO2
O Quartz (var: Rock Crystal)SiO2
O Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
NaSodium
Na AlbiteNa(AlSi3O8)
Na ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al Spodumene (var: Kunzite)LiAlSi2O6
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Microcline (var: Amazonite)K(AlSi3O8)
Al AlbiteNa(AlSi3O8)
Al ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al BerylBe3Al2(Si6O18)
Al SpodumeneLiAlSi2O6
Al MicroclineK(AlSi3O8)
Al Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
SiSilicon
Si TourmalineA(D3)G6(Si6O18)(BO3)3X3Z
Si Spodumene (var: Kunzite)LiAlSi2O6
Si QuartzSiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Microcline (var: Amazonite)K(AlSi3O8)
Si AlbiteNa(AlSi3O8)
Si ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si BerylBe3Al2(Si6O18)
Si SpodumeneLiAlSi2O6
Si MicroclineK(AlSi3O8)
Si Quartz (var: Rose Quartz)SiO2
Si Quartz (var: Rock Crystal)SiO2
Si Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K Microcline (var: Amazonite)K(AlSi3O8)
K MicroclineK(AlSi3O8)
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Lacroix, A. (1912) Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris, 35, 76- 84 [on spodumene].
Rakotoarison, W. (1964) Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A 1983, 39 pp.
Rustemeyer, P. and Pezzotta, F. (2015) Reise zu den Turmalinen von Antsirabé, Madagaskar. Lapis, 40(10), 18-31 + 90.


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