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Iankaroka phlogopite deposit, Ianabinda, Betroka, Anosy, Madagascari
Regional Level Types
Iankaroka phlogopite depositDeposit
IanabindaCommune
BetrokaDistrict
AnosyRegion
MadagascarCountry

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Name in Malagasy:Karieran' Iankaroka, Kaominin' Ianabinda, Distrikan'i Betroka, Faritr' Anosy, Madagasikara
Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 23° South , 45° East (est.)
Margin of Error:~29km
Locality type:Deposit
Köppen climate type:Cfa : Humid subtropical climate


A phlogopite-bearing pyroxenite mined for phlogopite mica. Located 20 km S of the town of Betroka. The pyroxenite vein cross the RN 13 (PK 136). It is 35 m wide and can be followed for 500-600 m.
Besaire (1966) gives these map coordinates: X = 301,7 and Y = 354,5. (Map sheet Betroka et Est Benenitra).
In the old mines a sapphirine-bearing anatectic Al-Mg granulite occurs (Razakamanana et al. 2006)

Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate
Tuléar Province (Toliara), MadagascarProvince

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Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


4 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!

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Alphabetical List Tree Diagram

Detailed Mineral List:

Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Besairie, H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 313.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Besairie, H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 313.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Besairie, H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 313.
Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Reference: Razakamanana, T., Ackermand, D. and Windley, B. F. (2006 ): Metamorphic evolution of sapphirine-bearing rocks from Vohidava area, Southern Madagascar: Structural and tectonic implication. Proceedings of the German-Malagasy Research Cooperation in Life and Earth Sciences edited by C Schwitzer, S Brandt et al. p 41-60

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Sapphirine9.DH.45Mg4(Mg3Al9)O4[Si3Al9O36]

List of minerals arranged by Dana 8th Edition classification

Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Group 69 - INOSILICATES Chains with Side Branches or Loops
Chains with Side Branches or Loops with P>2
Sapphirine69.2.1b.1Mg4(Mg3Al9)O4[Si3Al9O36]
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
OOxygen
O PhlogopiteKMg3(AlSi3O10)(OH)2
O MagnetiteFe2+Fe23+O4
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
SiSilicon
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
FeIron
Fe MagnetiteFe2+Fe23+O4
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Besairie, H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, p. 313.
Razakamanana, T., Ackermand, D. and Windley, B. F. (2006 ): Metamorphic evolution of sapphirine-bearing rocks from Vohidava area, Southern Madagascar: Structural and tectonic implication. Proceedings of the German-Malagasy Research Cooperation in Life and Earth Sciences edited by C Schwitzer, S Brandt et al. p 41-60


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