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Ankadilalana emerald mine, Ambalahosy Nord Commune, Mananjary District, Vatovavy Fitovinany, Madagascari
Regional Level Types
Ankadilalana emerald mineMine
Ambalahosy Nord CommuneCommune
Mananjary DistrictDistrict
Vatovavy FitovinanyRegion
MadagascarCountry

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Name(s) in local language(s):Karieran' Ankadilalana, Kaominin' Ambalahosy Nord, Distrikan' Mananjary, Faritra Vatovavy Fitovinany, Faritanin'i Fianarantsoa, Madagasikara
Latitude & Longitude (WGS84): 21° 19' 53'' South , 47° 54' 45'' East
Latitude & Longitude (decimal): -21.33147,47.91250
GeoHash:G#: mh4ndk8z4
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Ifanadiana17,543 (2018)29.1km
Mananjary27,686 (2018)45.9km
Vohimanitra6,000 (2018)46.5km
Other/historical names associated with this locality:Kianjovato emerald deposit; Mananjary emerald district


Emerald open pit mine in the rainforest region of eastern Madagascar, located near the village of Kianjovato, approx. 60 km west of the town of Mananjary. The village of Kianjovato is, since the village is situated along the RN 25 road, often used as a referencepoint in several written papers on this mine, but it is in fact situated in the commune north of the Kianjovato Commune.

The emeralds occurs here in the contact zone between pegmatite and biotite schists. The emeralds were formed by metasomatic processes at the contact between pegmatites and hornblendites related to a Pan-African tectonometamorphic event.
Based on fluid-inclusion data, the conditions of emerald growth were 250°C < T < 450°C and P = 1.5 kbar (Vapnik et al. 2006).


Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate
Fianarantsoa Province, MadagascarProvince

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


10 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:

'Apatite'
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
Beryl
Formula: Be3Al2(Si6O18)
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77; Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77; Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
'Biotite'
Colour: Brown
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
'Chlorite Group'
Reference: Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
Dolomite
Formula: CaMg(CO3)2
Reference: Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
Goethite
Formula: α-Fe3+O(OH)
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
Hematite
Formula: Fe2O3
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
Ilmenite
Formula: Fe2+TiO3
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
Quartz
Formula: SiO2
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77; Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
Roscoelite ?
Formula: K(V3+,Al)2(AlSi3O10)(OH)2
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
Rutile
Formula: TiO2
Reference: Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
Talc
Formula: Mg3Si4O10(OH)2
Reference: Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Dolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
Beryl9.CJ.05Be3Al2(Si6O18)
var: Emerald9.CJ.05Be3Al2(Si6O18)
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Roscoelite ?9.EC.15K(V3+,Al)2(AlSi3O10)(OH)2
Talc9.EC.05Mg3Si4O10(OH)2
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Biotite'-
'Chlorite Group'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
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
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Roscoelite ?71.2.2a.4K(V3+,Al)2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Apatite'-
Beryl
var: Emerald
-Be3Al2(Si6O18)
'Biotite'-
'Chlorite Group'-
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H Goethiteα-Fe3+O(OH)
H PhlogopiteKMg3(AlSi3O10)(OH)2
H TalcMg3Si4O10(OH)2
H RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
BeBeryllium
Be Beryl (var: Emerald)Be3Al2(Si6O18)
Be BerylBe3Al2(Si6O18)
BBoron
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
CCarbon
C DolomiteCaMg(CO3)2
OOxygen
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O IlmeniteFe2+TiO3
O QuartzSiO2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O Beryl (var: Emerald)Be3Al2(Si6O18)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O TalcMg3Si4O10(OH)2
O RutileTiO2
O DolomiteCaMg(CO3)2
O BerylBe3Al2(Si6O18)
O RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
MgMagnesium
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg TalcMg3Si4O10(OH)2
Mg DolomiteCaMg(CO3)2
AlAluminium
Al Beryl (var: Emerald)Be3Al2(Si6O18)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al BerylBe3Al2(Si6O18)
Al RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
SiSilicon
Si QuartzSiO2
Si Beryl (var: Emerald)Be3Al2(Si6O18)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si TalcMg3Si4O10(OH)2
Si BerylBe3Al2(Si6O18)
Si RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
K RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
CaCalcium
Ca DolomiteCaMg(CO3)2
TiTitanium
Ti IlmeniteFe2+TiO3
Ti RutileTiO2
VVanadium
V RoscoeliteK(V3+,Al)2(AlSi3O10)(OH)2
FeIron
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3

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: 3309297

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]

Paleoarchean
3200 - 3600 Ma



ID: 3192980
Archean crystalline metamorphic rocks

Age: Paleoarchean (3200 - 3600 Ma)

Lithology: Paragneiss; 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)
Hänni, H. A. and Klein, H. H (1982): Ein Smaragdvorkommen in Madagascar. Zeitschrift der Deutschen Gemmologischen Geschellschaft, 31 : 71-77
Vapnik, Ye., Moroz, I. Roth, M. and Eliezri, I. (2006): Formation of emeralds at pegmatite-ultramafic contacts based on fluid inclusions in Kianjavato emerald, Mananjary deposits, Madagascar. Mineralogical Magazine 70: 141-158.
Groat, L.A., Giuliani, G., Marshall, D.D., and Turner, D. (2008): Emerald deposits and occurrences: A review. Ore Geology Reviews 34, 87-112.

External Links



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