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Zazafotsy Quarry (Amboarohy), Zazafotsy Commune, Ihosy District, Ihorombe, Madagascari
Regional Level Types
Zazafotsy Quarry (Amboarohy)Quarry
Zazafotsy CommuneCommune
Ihosy DistrictDistrict
IhorombeRegion
MadagascarCountry

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Name(s) in local language(s):Amboarohy (Ambahatraso), Kaominin'i Zazafotsy, Distrikan' Ihosy, Faritra Ihorombe, Faritanin'i Fianarantsoa, Madagasikara
Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 21° South , 46° East (est.)
Margin of Error:~47km
Locality type:Quarry
Age:494 ± 5 Ma
Geologic Time:Furongian
Dating method:Ar – Ar biotite
Reference for age:Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Oxygen is
Köppen climate type:Cwa : Monsoon-influenced humid subtropical climate


Granulite facies pelites. Deposit famous for polychromatic corundum crystals.
Located about 35 km N of Ihosy following the RN 7 to Ambalavao. Populary called "Zazafotsy quarry" which also is the name of the village along RN 7 and the center of the Zazafotsy Commune, but originally called Amboarohy (Pezzotta 2005).
Exploitation started here in 1989.

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


6 valid minerals.

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.
'Biotite'
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.
Corundum
Formula: Al2O3
Reference: Pezzotta F. (2005): Rubini e zaffiri. Corindoni policromi di Amboarohy, Ihosy, Madagascar. Rivista Mineralogica Italiana,30 (2): 116-124
Corundum var: Ruby
Formula: Al2O3
Reference: Pezzotta F. (2005): Rubini e zaffiri. Corindoni policromi di Amboarohy, Ihosy, Madagascar. Rivista Mineralogica Italiana,30 (2): 116-124
Corundum var: Sapphire
Formula: Al2O3
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.
'K Feldspar'
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Tomasz Praszkier / Spirifer minerals photo
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Jordi Fabre
Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.
Sillimanite
Formula: Al2(SiO4)O
Reference: Peter Slootweg photo and specimen, photo-640593
Spinel
Formula: MgAl2O4
Reference: Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Corundum4.CB.05Al2O3
var: Ruby4.CB.05Al2O3
var: Sapphire4.CB.05Al2O3
Magnetite4.BB.05Fe2+Fe3+2O4
Spinel4.BB.05MgAl2O4
Group 9 - Silicates
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Sapphirine9.DH.45Mg4(Mg3Al9)O4[Si3Al9O36]
Sillimanite9.AF.05Al2(SiO4)O
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Corundum4.3.1.1Al2O3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Spinel7.2.1.1MgAl2O4
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Group 69 - INOSILICATES Chains with Side Branches or Loops
Chains with Side Branches or Loops with P>2
Sapphirine69.2.1b.1Mg4(Mg3Al9)O4[Si3Al9O36]
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Biotite'-
Corundum
var: Ruby
-Al2O3
var: Sapphire-Al2O3
'Garnet Group'-X3Z2(SiO4)3
'K Feldspar'-

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
OOxygen
O Corundum (var: Ruby)Al2O3
O CorundumAl2O3
O MuscoviteKAl2(AlSi3O10)(OH)2
O Corundum (var: Sapphire)Al2O3
O SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
O Garnet GroupX3Z2(SiO4)3
O SpinelMgAl2O4
O MagnetiteFe2+Fe23+O4
O SillimaniteAl2(SiO4)O
MgMagnesium
Mg SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Mg SpinelMgAl2O4
AlAluminium
Al Corundum (var: Ruby)Al2O3
Al CorundumAl2O3
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Corundum (var: Sapphire)Al2O3
Al SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Al SpinelMgAl2O4
Al SillimaniteAl2(SiO4)O
SiSilicon
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si SapphirineMg4(Mg3Al9)O4[Si3Al9O36]
Si Garnet GroupX3Z2(SiO4)3
Si SillimaniteAl2(SiO4)O
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
FeIron
Fe MagnetiteFe2+Fe23+O4

Geochronology

Mineralization age: Furongian : 494 ± 5 Ma

Important note: This table is based only on rock and mineral ages recorded below and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
Phanerozoic
 Paleozoic
  Cambrian
   Furongian
ⓘ Biotite494 ± 5 Ma

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Pezzotta F. (2005): Rubini e zaffiri. Corindoni policromi di Amboarohy, Ihosy, Madagascar. Rivista Mineralogica Italiana,30 (2): 116-124.
Caucia F., Boiocchi M. (2005): Corindone. I cromofori nei cristalli policromi di Amboarohy, Ihosy, Madagascar. Risultati degli studi microanalitici. Rivista Mineralogica Italiana, 30 (2): 126-129.
Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita 42, 251-270.
Rakotondrazafy, A.F.M., Giuliani, G., Ohnenstetter, D., Fallick, A.E., Rakotosamizanany, S., Andriamamonjy, A., Ralantoarison, T., Razanatseheno, M., Offant, Y., Garnier, V., Maluski, H., Dunaigre, C., Schwarz, D., and Ratrimo, V. (2008): Gem corundum deposits of Madagascar: A review. Ore Geology Reviews 34, 134-154.


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