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Befilaho II, Berere Pegmatite Field, Bekapaika Commune, Tsaratanàna District, Betsiboka Region, Mahajanga Province (Majunga), Madagascar

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 16° South , 47° East (est.)
Margin of Error:~28km
Locality type:Pegmatite
Köppen climate type:Am : Tropical monsoon climate
Name(s) in local language(s):Befilaho II, Pegmatitan'i Berere, Distrikan'i Tsaratanána, Faritr'i Betsiboka, Faritanin'i Mahajanga, Madagasikara


A granite LCT pegmatite, Beryll-Columbite subtype mostly worked for beryl and columbo-tantalite. Zonated, 30 x 20 m large.

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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


3 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)
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
'commodity:Beryllium'
Formula: Be
Reference:  
'Biotite'
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
'commodity:Coltan (Columbite-Tantalite)'
Reference:  
'Columbite-(Fe)-Columbite-(Mn) Series'
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
'Feldspar Group'
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
'Feldspar Group var: Perthite'
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
'Pegmatite'
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.
Quartz
Formula: SiO2
Reference: Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
Group 9 - Silicates
'Beryl'9.CJ.05Be3Al2(Si6O18)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Feldspar Group'-
'var: Perthite'-
'Garnet Group'-X3Z2(SiO4)3
'Pegmatite'-

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)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Feldspar Group'-
'var: Perthite'-
'Garnet Group'-X3Z2(SiO4)3
'Pegmatite'-

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
OOxygen
O BerylBe3Al2(Si6O18)
O Garnet GroupX3Z2(SiO4)3
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
AlAluminium
Al BerylBe3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
SiSilicon
Si BerylBe3Al2(Si6O18)
Si Garnet GroupX3Z2(SiO4)3
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Giraud, P; Bertucat, M & Giraudon (1957): Etude geologique et prospection de la feuille Betrandraka [P-42]1/100.00 et du champ pegmatique de Berere. Travaux Bureau Géologique nr 82, Service Géologique, Tananarive 1957.


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