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Benato phlogopite mines, Benato Toby, Betroka, Anosy, Madagascari
Regional Level Types
Benato phlogopite minesGroup of Mines (Abandoned)
Benato TobyCommune
BetrokaDistrict
AnosyRegion
MadagascarCountry

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Latitude & Longitude (WGS84):
23° 5' 18'' South , 45° 51' 33'' East
Latitude & Longitude (decimal):
Locality type:
Group of Mines (Abandoned)
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Ambalasoa4,000 (2018)14.7km
Other Languages:
Malagasy:
Karieran'i Benato, Kaominin'i Benato Toby, Distrikan'i Betroka, Faritr' Anosy, Madagasikara


The locality Benato is refering to a several phlogopite workings and mines around Benato Toby, N of the small stream of Itafia, about 30 km NW of the town Betroka in the southern part of Madagascar. Discovered by M.A. Louys. Exploitation started here in 1924. Large pockets with large phlogopite crystals has been found in the JS.9 mine, the largest measured 4 m in length and 2 m in diameter and weighed 27,5 tons ! The JS.9 mine was mined from 1948 to 1953.

Regions containing this locality

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

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

16 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!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Anhydrite
Formula: CaSO4
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Calcite
Formula: CaCO3
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Chabazite'
Habit: crystals < 8mm
Reference: Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p 24
Diopside
Formula: CaMgSi2O6
Description: Large well-devoloped crystals up to 80 cm long has been reported (Behier 1960). Especially in the J.S.7 prospect
Reference: Behier, J. (1960): Contribution á la Minéralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive, p 33
Fluorite
Formula: CaF2
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Gypsum
Formula: CaSO4 · 2H2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Heulandite subgroup'
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Michel Arliguie collection & photo (photo id 899771), old collection
'Mica Group'
Reference: Michel Arliguie photo & specimen, Photo-id 90060
Molybdenite
Formula: MoS2
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Opal
Formula: SiO2 · nH2O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Pyrite
Formula: FeS2
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Pyrrhotite
Formula: Fe7S8
Habit: Large masses; small grains & incomplete hexagonal crystals
Reference: Lacroix, A. (1941): Les gisements de phlogopite de Madagascar et les pyroxenites qui les renferment. Texte (Extrait du fasicule XI des Annuales Géologiques du Service des Mines). Tananarive. p. 57
'Scapolite'
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Spinel
Formula: MgAl2O4
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
'Stilbite subgroup'
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Titanite
Formula: CaTi(SiO4)O
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Zircon
Formula: Zr(SiO4)
Reference: Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anhydrite7.AD.30CaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Diopside9.DA.15CaMgSi2O6
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chabazite'-
'Heulandite subgroup'-
'Mica Group'-
'Scapolite'-
'Stilbite subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Anhydrite28.3.2.1CaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 4-membered rings
Prehnite72.1.3.1Ca2Al2Si3O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Unclassified Minerals, Mixtures, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Chabazite'-
'Heulandite subgroup'-
'Mica Group'-
'Scapolite'-
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
H GypsumCaSO4 · 2H2O
H AnalcimeNa(AlSi2O6) · H2O
H PrehniteCa2Al2Si3O10(OH)2
H OpalSiO2 · nH2O
H ApatiteCa5(PO4)3(Cl/F/OH)
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H LaumontiteCaAl2Si4O12 · 4H2O
CCarbon
C CalciteCaCO3
OOxygen
O PhlogopiteKMg3(AlSi3O10)(OH)2
O GypsumCaSO4 · 2H2O
O AnhydriteCaSO4
O AnalcimeNa(AlSi2O6) · H2O
O PrehniteCa2Al2Si3O10(OH)2
O OpalSiO2 · nH2O
O ApatiteCa5(PO4)3(Cl/F/OH)
O ZirconZr(SiO4)
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O TitaniteCaTi(SiO4)O
O SpinelMgAl2O4
O CalciteCaCO3
O DiopsideCaMgSi2O6
O LaumontiteCaAl2Si4O12 · 4H2O
FFluorine
F FluoriteCaF2
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg SpinelMgAl2O4
Mg DiopsideCaMgSi2O6
AlAluminium
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al AnalcimeNa(AlSi2O6) · H2O
Al PrehniteCa2Al2Si3O10(OH)2
Al SpinelMgAl2O4
Al LaumontiteCaAl2Si4O12 · 4H2O
SiSilicon
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si AnalcimeNa(AlSi2O6) · H2O
Si PrehniteCa2Al2Si3O10(OH)2
Si OpalSiO2 · nH2O
Si ZirconZr(SiO4)
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si TitaniteCaTi(SiO4)O
Si DiopsideCaMgSi2O6
Si LaumontiteCaAl2Si4O12 · 4H2O
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S GypsumCaSO4 · 2H2O
S AnhydriteCaSO4
S MolybdeniteMoS2
S PyriteFeS2
S PyrrhotiteFe7S8
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca FluoriteCaF2
Ca GypsumCaSO4 · 2H2O
Ca AnhydriteCaSO4
Ca PrehniteCa2Al2Si3O10(OH)2
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca TitaniteCaTi(SiO4)O
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca LaumontiteCaAl2Si4O12 · 4H2O
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2

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

Mesoproterozoic
1000 - 1600 Ma



ID: 3311848

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Plutonic and metamorphic

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

Paleoproterozoic
1600 - 2500 Ma



ID: 3191055
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 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]

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)
Savorin, A. (1937) Les gisements de mica phlogopite du Sud de Madagascar. Annales Géologiques du service des mines, VII, Tananarive. p. 9-23
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871
Besairie, H. (1966): Les Gites Minéraux de Madagascar. Annales Géologiques de Madagascar, Tananarive. 34, 309-310

Localities in this Region
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