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Andrianampy, Sahatany Valley, Ibity, Antsirabe II, Vakinankaratra, Madagascari
Regional Level Types
AndrianampyQuarry
Sahatany ValleyValley
IbityCommune
Antsirabe IIDistrict
VakinankaratraRegion
MadagascarCountry

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Name in Malagasy:Andrianampy, Lohasahan'i Sahatany, Kaominin' Alatsinainy Ibity, Distrikan' Antsirabe II, Vakinankaratra, Madagasikara
Latitude & Longitude (WGS84): 20° 3' 2'' South , 46° 59' 20'' East
Latitude & Longitude (decimal): -20.05056,46.98889
GeoHash:G#: mh3mvmbm0
Locality type:Quarry
Köppen climate type:Cwb : Subtropical highland climate or temperate oceanic climate with dry winters
Nearest Settlements:
PlacePopulationDistance
Antsirabe186,253 (2018)21.0km
Betafo29,785 (2018)28.2km
Soanindrariny21,000 (2018)30.5km
Fandriana31,437 (2018)45.9km
Other/historical names associated with this locality:Sahatany pegmatite field


Old pegmatite quarry situated about 1 km N of the cement plant near Mt. Ibity.
An LCT pegmatite dike about 40 m long and 6-8 m wide has been worked mostly for gemmy red tourmaline. The pegmatite is hosted in mica schist and is heavily altered and kaolinized.

Raktoarison (1964) locality nr 20.

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


8 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:

Beryl
Formula: Be3Al2(Si6O18)
Colour: blue-green
Reference: Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p 29
Bismuth
Formula: Bi
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Cookeite
Formula: (Al2Li)Al2(AlSi3O10)(OH)8
Reference: Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p. 28-29
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
'Lepidolite'
Reference: Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p 29
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
'Pyrochlore Supergroup'
Formula: A2-mD2X6-wZ1-n
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Pyrochlore Supergroup var: Betafite (of Hogarth 1977)'
Formula: A2-mD2X6-wZ1+w
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Quartz
Formula: SiO2
Reference: Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p 29
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.
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
'Rubellite'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
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: Rakotoarison, W. (1964): Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A.1983, pp.1-39.
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Bergverksmuseets skrifter 25, 5-18
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Colour: Red, black,rose, green
Reference: Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p 29

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Bismuth1.CA.05Bi
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
var: Rose Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 9 - Silicates
Beryl9.CJ.05Be3Al2(Si6O18)
Cookeite9.EC.55(Al2Li)Al2(AlSi3O10)(OH)8
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Topaz9.AF.35Al2(SiO4)(F,OH)2
Unclassified Minerals, Rocks, etc.
'Lepidolite'-
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
'var: Betafite (of Hogarth 1977)'-A2-mD2X6-wZ1+w
'Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Bismuth1.3.1.4Bi
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Pyrochlore Supergroup
var: Betafite (of Hogarth 1977)'
8.2.3.1A2-mD2X6-wZ1+w
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Topaz52.3.1.1Al2(SiO4)(F,OH)2
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
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
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
Unclassified Minerals, Mixtures, etc.
Kaolinite-Al2(Si2O5)(OH)4
'Lepidolite'-
'Pyrochlore Supergroup'-A2-mD2X6-wZ1-n
Quartz
var: Rose Quartz
-SiO2
var: Smoky Quartz-SiO2
'Rubellite'-A(D3)G6(T6O18)(BO3)3X3Z
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
H TopazAl2(SiO4)(F,OH)2
H KaoliniteAl2(Si2O5)(OH)4
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
LiLithium
Li Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
B RubelliteA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O BerylBe3Al2(Si6O18)
O Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
O QuartzSiO2
O TopazAl2(SiO4)(F,OH)2
O Quartz (var: Smoky Quartz)SiO2
O KaoliniteAl2(Si2O5)(OH)4
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O RubelliteA(D3)G6(T6O18)(BO3)3X3Z
O Quartz (var: Rose Quartz)SiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
FFluorine
F TopazAl2(SiO4)(F,OH)2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
AlAluminium
Al BerylBe3Al2(Si6O18)
Al Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Al TopazAl2(SiO4)(F,OH)2
Al KaoliniteAl2(Si2O5)(OH)4
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si BerylBe3Al2(Si6O18)
Si Cookeite(Al2Li)Al2(AlSi3O10)(OH)8
Si QuartzSiO2
Si TopazAl2(SiO4)(F,OH)2
Si Quartz (var: Smoky Quartz)SiO2
Si KaoliniteAl2(Si2O5)(OH)4
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Quartz (var: Rose Quartz)SiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
FeIron
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
BiBismuth
Bi BismuthBi

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

Ectasian - Calymmian
1200 - 1600 Ma



ID: 3184647
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1200 - 1600 Ma)

Lithology: Crystalline metamorphic rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Rhyacian
2050 - 2300 Ma



ID: 3310225

Age: Rhyacian (2050 - 2300 Ma)

Lithology: Plutonic and metamorphic

Reference: Thiéblemont, D. (ed.). New edition of the 1:10,000,000 geological map of Africa. CGMW-BRGM. [190]

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Behier, J. (1960) Contribution à la minéralogie de Madagascar. Annales Géologiques de Madagascar 29, 28-29.
Behier, J. (1963) Carte minéralogique de Madagascar. Archive Service Géologique Madagascar. A 1871.
Rakotoarison, W. (1964) Les pegmatites de la Sahatany. Archive du Service Géologique Madagascar. A 1983, 39 pp.


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