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Morafeno emerald mine, Andonabe Commune, Mananjary District, Vatovavy Fitovinany Region, Fianarantsoa Province, Madagascar

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Latitude & Longitude (WGS84): 21° 27' 3'' South , 47° 54' 51'' East
Latitude & Longitude (decimal): -21.45111,47.91444
GeoHash:G#: mh4jfqfnp
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate


One of the richest emerald mines in Madagascar. It is located 30 km S of the town of Mananjary and 8 km south of Irondro in the Mananjary district in the Eastern part of Madagascar. It is the largest mine in the southern zone of the Mananjary emerald district. From 1993 to 1990 it produced several thousand kgs of emerald of different sizes and quality.

The emerald mineralisation occurs within phlogopitite developed at the contact between pegmatite and basic/ultrabasic rocks, characterised by pegmatites intruding highly folded and boudinaged amphibolites.

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


9 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:

'Amphibolite'
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Anorthite
Formula: Ca(Al2Si2O8)
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
'Apatite'
Reference: Knut Edvard Larsen collection # M-201
Beryl
Formula: Be3Al2(Si6O18)
Reference: Kanis, J. & Schwartz, D. (2001): Smaragde aus Afrika. ExtraLapis no. 21, p.62-63 [in german]; Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Reference: Kanis, J. & Schwartz, D. (2001): Smaragde aus Afrika. ExtraLapis no. 21, p.62-63 [in german]; Emeralds of the World English extraLapis Vol. 2 2002 pp24-35
'Biotite'
Reference: Paolo Franchi collection.; Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Calcite
Formula: CaCO3
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
'Chlorite Group'
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Diopside
Formula: CaMgSi2O6
'Garnet Group'
Formula: X3Z2(SiO4)3
'commodity:Gemstones'
Reference:  
Molybdenite
Formula: MoS2
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
'Pegmatite'
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Pyrite
Formula: FeS2
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Quartz
Formula: SiO2
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
'Scapolite'
Reference: Extra Lapis no. 21, pp. 62-63.
'Schist'
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.
Titanite
Formula: CaTi(SiO4)O
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Reference: Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Anorthite'9.FA.35Ca(Al2Si2O8)
'Beryl'9.CJ.05Be3Al2(Si6O18)
var: Emerald9.CJ.05Be3Al2(Si6O18)
'Diopside'9.DA.15CaMgSi2O6
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Titanite9.AG.15CaTi(SiO4)O
Unclassified Minerals, Rocks, etc.
'Amphibolite'-
'Apatite'-
'Biotite'-
'Chlorite Group'-
Garnet Group-X3Z2(SiO4)3
Pegmatite-
Scapolite-
Schist-
Wolframite-(Fe2+)WO4 to (Mn2+)WO4

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
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 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
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 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
'Amphibolite'-
Anorthite-Ca(Al2Si2O8)
'Apatite'-
Beryl
var: Emerald
-Be3Al2(Si6O18)
'Biotite'-
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Pegmatite'-
'Scapolite'-
'Schist'-
'Wolframite'-(Fe2+)WO4 to (Mn2+)WO4

List of minerals for each chemical element

HHydrogen
H PhlogopiteKMg3(AlSi3O10)(OH)2
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Emerald)Be3Al2(Si6O18)
CCarbon
C CalciteCaCO3
OOxygen
O AnorthiteCa(Al2Si2O8)
O BerylBe3Al2(Si6O18)
O CalciteCaCO3
O DiopsideCaMgSi2O6
O Beryl (var: Emerald)Be3Al2(Si6O18)
O Garnet GroupX3Z2(SiO4)3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O QuartzSiO2
O TitaniteCaTi(SiO4)O
O Wolframite(Fe2+)WO4 to (Mn2+)WO4
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Al AnorthiteCa(Al2Si2O8)
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Emerald)Be3Al2(Si6O18)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Si AnorthiteCa(Al2Si2O8)
Si BerylBe3Al2(Si6O18)
Si DiopsideCaMgSi2O6
Si Beryl (var: Emerald)Be3Al2(Si6O18)
Si Garnet GroupX3Z2(SiO4)3
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si QuartzSiO2
Si TitaniteCaTi(SiO4)O
SSulfur
S MolybdeniteMoS2
S PyriteFeS2
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca AnorthiteCa(Al2Si2O8)
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Wolframite(Fe2+)WO4 to (Mn2+)WO4
FeIron
Fe PyriteFeS2
Fe Wolframite(Fe2+)WO4 to (Mn2+)WO4
MoMolybdenum
Mo MolybdeniteMoS2
WTungsten
W Wolframite(Fe2+)WO4 to (Mn2+)WO4

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

Cryogenian - Tonian
635 - 1000 Ma



ID: 3308755

Age: Neoproterozoic (635 - 1000 Ma)

Lithology: Volcanic-sedimentary

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

Mesoarchean - Paleoarchean
2800 - 3600 Ma



ID: 3189670
Archean sedimentary rocks

Age: Archean (2800 - 3600 Ma)

Lithology: Migmatite; orthogneiss/paragneiss

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)
Schwartz, D. (1994) Emeralds from the Mananjary region, Madagascar: Internal features. Gems & Gemmology. Summer 1994: 88-101
Kanis, J. & Schwartz, D. (2001): Smaragde aus Afrika. ExtraLapis no. 21, p.62-63 [in german]
Cheilletz, A. et al. (2001): OS06 : TUpm30 : G5 : Emerald Deposits in Madagascar: Two Differents Types for one Mineralising Event:EUG XI.Symposium OS06 Mineralogy, Ore Geology and Mineral Resources.

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