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Vohibola phlogopite deposit, Behara, Amboasary Sud District, Anosy, Madagascari
Regional Level Types
Vohibola phlogopite depositDeposit
BeharaCommune
Amboasary Sud DistrictDistrict
AnosyRegion
MadagascarCountry

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Latitude & Longitude (WGS84):
24° South , 46° East (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~26km
GRN:
S17E30
Type:
Deposit
Köppen climate type:
Am : Tropical monsoon climate
Mindat Locality ID:
35643
Long-form identifier:
mindat:1:2:35643:4
GUID (UUID V4):
abafe75d-8586-48a1-99f1-fc8d9eb436d7
Other/historical names associated with this locality:
Vohibolo; Vohiboly; Concession P.E. 2820 Lanoue
Other Languages:
Malagasy:
Vohibola, Kaominin'i Behara, Distrikan' Amboasary Atsimo, Faritr' Anosy, Madagasikara


A phlogopite deposit located about 11 km NW of Behara. Grandidierite was discovered here by Danet Rafalimanana and Rakotomandimby around 1960. At the time, it occurred relatively abundantly in the dumps.

The grandidierite was found in a diopside-bearing fine-grained pyroxenite, a diopsidite, at the contact in the direction NW of the site.

Besairie (1966) gave these map coordinates for Vohibola: X= 137 and Y= 402,5 (Map sheet Behara).

Concession P.E. 2820 Lanoue.

Vohibola is, according to Grew (1996), probably the source of the grandidierite specimen described by von Knorring et al. (1969) and the NMNH specimen #121887 (labelled as coming from "Vohiboly"].

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


10 valid minerals.

Rock Types Recorded

Note: 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:

ⓘ 'Amphibole Supergroup'
Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ Böhmite
Formula: AlO(OH)
ⓘ Calcite
Formula: CaCO3
Description: As a thin crust on grandidierite specimens
ⓘ 'Chlorite Group'
ⓘ Diopside
Formula: CaMgSi2O6
ⓘ Grandidierite
Formula: (Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Habit: Intertangled masses and fanlike groups of poorly developed crystals up to 3cm long and 1,5 cm wide
Colour: bluegreen; Translucent, transparent in splinters
Description: Sometimes part of the grandidierite or the matrix is covered by a thin crust of calcite
ⓘ 'Jasper'
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
ⓘ Quartz
Formula: SiO2
ⓘ 'Scapolite'
ⓘ Serendibite
Formula: Ca4[Mg6Al6]O4[Si6B3Al3O36]
Habit: anhedral, occurs in single grains and aggregates.
Colour: colourless to yellow green
ⓘ Sinhalite
Formula: MgAl(BO4)
ⓘ Spinel
Formula: MgAl2O4
ⓘ 'Tourmaline'
Formula: AD3G6 (T6O18)(BO3)3X3Z

Gallery:

(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2ⓘ Grandidierite

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘSpinel4.BB.05MgAl2O4
ⓘQuartz4.DA.05SiO2
ⓘOpal4.DA.10SiO2 · nH2O
ⓘBöhmite4.FE.15AlO(OH)
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
Group 6 - Borates
ⓘSinhalite6.AC.05MgAl(BO4)
Group 9 - Silicates
ⓘGrandidierite9.AJ.05(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
ⓘDiopside9.DA.15CaMgSi2O6
ⓘSerendibite9.DH.40Ca4[Mg6Al6]O4[Si6B3Al3O36]
ⓘPhlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Unclassified
ⓘ'Amphibole Supergroup'-AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
ⓘ'Chlorite Group'-
ⓘ'Jasper'-
ⓘ'Tourmaline'-AD3G6 (T6O18)(BO3)3X3Z
ⓘ'Scapolite'-

List of minerals for each chemical element

HHydrogen
Hⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Hⓘ BöhmiteAlO(OH)
Hⓘ OpalSiO2 · nH2O
Hⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
BBoron
Bⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Bⓘ SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
Bⓘ SinhaliteMgAl(BO4)
Bⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Oⓘ BöhmiteAlO(OH)
Oⓘ CalciteCaCO3
Oⓘ DiopsideCaMgSi2O6
Oⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Oⓘ OpalSiO2 · nH2O
Oⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
Oⓘ SinhaliteMgAl(BO4)
Oⓘ SpinelMgAl2O4
Oⓘ TourmalineAD3G6 (T6O18)(BO3)3X3Z
FFluorine
Fⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mgⓘ DiopsideCaMgSi2O6
Mgⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Mgⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Mgⓘ SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
Mgⓘ SinhaliteMgAl(BO4)
Mgⓘ SpinelMgAl2O4
AlAluminium
Alⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Alⓘ BöhmiteAlO(OH)
Alⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Alⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Alⓘ SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
Alⓘ SinhaliteMgAl(BO4)
Alⓘ SpinelMgAl2O4
SiSilicon
Siⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Siⓘ DiopsideCaMgSi2O6
Siⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2
Siⓘ OpalSiO2 · nH2O
Siⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
ClChlorine
Clⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
Kⓘ PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Caⓘ CalciteCaCO3
Caⓘ DiopsideCaMgSi2O6
Caⓘ SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]
TiTitanium
Tiⓘ Amphibole SupergroupAB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
FeIron
Feⓘ Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2

Other Regions, Features and Areas containing this locality

Madagascar
Somali PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Behier, Jean (1960) Travaux minéralogiques. Rapport Annuel du Service géologique, 1960. Republique Madagascar. 181-199
Behier, Jean (1963) Carte minéralogique de Madagascar. Archive Service Géologique de Madagascar A.1871
Besaire, Henri (1966) Gîtes minéraux de Madagascar. Annales géologiques de Madagascar Vol. 34. République Malgache
Ratsimandisa, Serre (1967) Travaux mineralogiques pour 1967. Rapport Annuel du Service géologique pour 1967. Republique Madagascar p.121-124.
von Knorring, Oleg, Sahama, Th.G., Lehtinen, M. (1969) A note on grandidierite from Fort Dauphin, Madagascar. Bulletin of the Geological Society of Finland, 41. The Geological Society of Finland. 71-74 doi:10.17741/bgsf/41.006
Black, Philippa M. (1970) Grandidierite from Cuvier Island, New Zealand. Mineralogical Magazine, 37 (289) 615-617 doi:10.1180/minmag.1970.037.289.12 with analysis of a grandidierite from Vohiboly (=Vohibola)
Seifert, F., Olesch, M. (1977) Mössbauer spectroscopy of grandidierite, (Mg,Fe)Al3BSiO9. American Mineralogist, 62 (5-6) 547-553 with analysis of grandidierite from Vohibola
Grew, Ed S. (1996) Borosilicates (Exclusive of Tourmaline) and Boron in Rock-forming Minerals in Metamorphic Environments. Reviews in Mineralogy and Geochemistry Vol. 33. Mineralogical Society of America p.387-502.p.406
Farges, F. (2001) Crystal chemistry of iron in natural grandidierites: an X-ray absorption fine-structure spectroscopy study. Physics and Chemistry of Minerals, 28 (9) 619-629 doi:10.1007/s002690100170with a Fe-K edge XAFS spectra analysis of grandidierite from Vohibola
Razakamanana, T., Windley, B.F., Ackermand, D (2010) Petrology, chemistry and phase relations of borosilicate phases in phlogopite diopsidites and granitic pegmatites from the Tranomaro belt, SE Madagascar; boron-fluid evolution. Special Publication, 338. Geological Society of London. 139-161 doi:10.1144/sp338.7
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