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Itremo massif, Itremo Commune, Ambatofinandrahana District, Amoron'i Mania Region, Fianarantsoa Province, Madagascar

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Location is approximate, estimate based on other nearby localities.
 
Latitude & Longitude (WGS84): 20° South , 46° East (est.)
Margin of Error:~34km
Locality type:Massif
Köppen climate type:Cwb : Subtropical highland climate or temperate oceanic climate with dry winters
Name(s) in local language(s):Tangorombohitr' Itremo, Kaominin' Itremo, Distrikan' Ambatofinandrahana, Faritra Amoron'i Mania, Faritanin'i Fianarantsoa, Madagasikara


NOTE:
The large Itremo massif is divided administratively into 3 different communes (kaominina): Itremo Commune, Mangatabohangy Commune and Amborompotsy Commune. Below, the localitites located in Itremo and Mangatabohangy Communes are listed.
A large part of the massif, an area of 273 km² has recently (2003) become an protected area due to its many diverse and rare plants.

" In Ambatofinandrahana there is a number of quartz localities (thousands of quartz veins) but majority of specimens in this area are mined vicinity of Itremo village. This big village is situated just before entering to scattered Itremo Massif - metamorphosed sedimentary rocks, which today are quartzites and marbles. In this massif there are thousands of quartz veins (hydrothermal low temperature) with very varied quartz crystals. In some veins there is simple rock crystal (crystals up to 70 cm), in others there are so-called pineapple quartz. Some veins contain quartz with bubbles, hollandite or inclusions of a greenish micaeous mineral.
People from Itremo make irregular mining in their neighbourhood (around 15 km). Other areas of Itremo Massif are almost completely unexplored.
Majority of quartz from Madagascar (even if not labelled like this) is from Itremo massif". Tomasz Praszkier commentary see http://www.mindat.org/mesg-95-131671.html


Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Itremo Massif
Itremo massif, Madagascar

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Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

16 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!

Rock list contains entries from the region specified including sub-localities

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Alphabetical List Tree Diagram

Detailed Mineral List:

Amblygonite
Formula: LiAl(PO4)F
'Apatite'
Augelite
Formula: Al2(PO4)(OH)3
Berlinite
Formula: AlPO4
Beryl
Formula: Be3Al2(Si6O18)
Localities:
Celestine
Formula: SrSO4
Dumortierite
Formula: (Al,Fe3+)7(SiO4)3(BO3)O3
'Feldspar Group'
Localities:
Goyazite
Formula: SrAl3(PO4)(PO3OH)(OH)6
Hematite
Formula: Fe2O3
Reference: Rob Lavinsky photo
Kyanite
Formula: Al2(SiO4)O
Lazulite
Formula: (Mg,Fe2+)Al2(PO4)2(OH)2
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Hyršl, J. & Praszkier, T. (2015): Neufunde von Japaner-Zwillingen in Madagaskar. Mineralien-Welt. 26 (1), 48-51
Muscovite var: Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
Reference: Hyršl, J. & Praszkier, T. (2015): Neufunde von Japaner-Zwillingen in Madagaskar. Mineralien-Welt. 26 (1), 48-51
'Pegmatite'
Localities:
'Pumpellyite'
Quartz
Formula: SiO2
Reference: Pezzotta, F.(1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. ExtraLapis nr 17,p. 82 [german version, short notice]
Quartz var: Milky Quartz
Formula: SiO2
Reference: Karel Bal Collection
Rutile
Formula: TiO2
Sillimanite
Formula: Al2(SiO4)O
Localities:
Svanbergite
Formula: SrAl3(PO4)(SO4)(OH)6
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Trolleite
Formula: Al4(PO4)3(OH)3

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Quartz4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Celestine'7.AD.35SrSO4
Group 8 - Phosphates, Arsenates and Vanadates
'Amblygonite'8.BB.05LiAl(PO4)F
'Augelite'8.BE.05Al2(PO4)(OH)3
'Berlinite'8.AA.05AlPO4
Goyazite8.BL.10SrAl3(PO4)(PO3OH)(OH)6
Lazulite8.BB.40(Mg,Fe2+)Al2(PO4)2(OH)2
Svanbergite8.BL.05SrAl3(PO4)(SO4)(OH)6
Trolleite8.BB.45Al4(PO4)3(OH)3
Group 9 - Silicates
'Beryl'9.CJ.05Be3Al2(Si6O18)
'Dumortierite'9.AJ.10(Al,Fe3+)7(SiO4)3(BO3)O3
Kyanite9.AF.15Al2(SiO4)O
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Fuchsite9.EC.15K(Al,Cr)3Si3O10(OH)2
Sillimanite9.AF.05Al2(SiO4)O
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Feldspar Group'-
Pegmatite-
Pumpellyite-
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
AX2
Rutile4.4.1.1TiO2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Celestine28.3.1.2SrSO4
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Berlinite38.4.2.1AlPO4
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Amblygonite41.5.8.1LiAl(PO4)F
A2(XO4)Zq
Augelite41.6.8.1Al2(PO4)(OH)3
(AB)3(XO4)2Zq
Lazulite41.10.1.1(Mg,Fe2+)Al2(PO4)2(OH)2
Miscellaneous
Trolleite41.11.1.1Al4(PO4)3(OH)3
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq·xH2O
Goyazite42.7.3.3SrAl3(PO4)(PO3OH)(OH)6
Group 43 - COMPOUND PHOSPHATES, ETC.
Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
Svanbergite43.4.1.6SrAl3(PO4)(SO4)(OH)6
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
Kyanite52.2.2c.1Al2(SiO4)O
Sillimanite52.2.2a.1Al2(SiO4)O
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with (BO3)
Dumortierite54.1.2.1(Al,Fe3+)7(SiO4)3(BO3)O3
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.
'Apatite'-
'Feldspar Group'-
Muscovite
var: Fuchsite
-K(Al,Cr)3Si3O10(OH)2
'Pegmatite'-
'Pumpellyite'-
Quartz
var: Milky Quartz
-SiO2
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z

List of minerals for each chemical element

HHydrogen
H AugeliteAl2(PO4)(OH)3
H Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
H GoyaziteSrAl3(PO4)(PO3OH)(OH)6
H Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H SvanbergiteSrAl3(PO4)(SO4)(OH)6
H TrolleiteAl4(PO4)3(OH)3
LiLithium
Li AmblygoniteLiAl(PO4)F
BeBeryllium
Be BerylBe3Al2(Si6O18)
BBoron
B Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
OOxygen
O AmblygoniteLiAl(PO4)F
O AugeliteAl2(PO4)(OH)3
O BerliniteAlPO4
O BerylBe3Al2(Si6O18)
O CelestineSrSO4
O Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3
O Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
O GoyaziteSrAl3(PO4)(PO3OH)(OH)6
O HematiteFe2O3
O KyaniteAl2(SiO4)O
O Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
O Quartz (var: Milky Quartz)SiO2
O MuscoviteKAl2(AlSi3O10)(OH)2
O QuartzSiO2
O RutileTiO2
O SillimaniteAl2(SiO4)O
O SvanbergiteSrAl3(PO4)(SO4)(OH)6
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O TrolleiteAl4(PO4)3(OH)3
FFluorine
F AmblygoniteLiAl(PO4)F
MgMagnesium
Mg Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
AlAluminium
Al AmblygoniteLiAl(PO4)F
Al AugeliteAl2(PO4)(OH)3
Al BerliniteAlPO4
Al BerylBe3Al2(Si6O18)
Al Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3
Al Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
Al GoyaziteSrAl3(PO4)(PO3OH)(OH)6
Al KyaniteAl2(SiO4)O
Al Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al SillimaniteAl2(SiO4)O
Al SvanbergiteSrAl3(PO4)(SO4)(OH)6
Al TrolleiteAl4(PO4)3(OH)3
SiSilicon
Si BerylBe3Al2(Si6O18)
Si Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3
Si Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
Si KyaniteAl2(SiO4)O
Si Quartz (var: Milky Quartz)SiO2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si SillimaniteAl2(SiO4)O
PPhosphorus
P AmblygoniteLiAl(PO4)F
P AugeliteAl2(PO4)(OH)3
P BerliniteAlPO4
P GoyaziteSrAl3(PO4)(PO3OH)(OH)6
P Lazulite(Mg,Fe2+)Al2(PO4)2(OH)2
P SvanbergiteSrAl3(PO4)(SO4)(OH)6
P TrolleiteAl4(PO4)3(OH)3
SSulfur
S CelestineSrSO4
S SvanbergiteSrAl3(PO4)(SO4)(OH)6
KPotassium
K Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
TiTitanium
Ti RutileTiO2
CrChromium
Cr Muscovite (var: Fuchsite)K(Al,Cr)3Si3O10(OH)2
FeIron
Fe HematiteFe2O3
SrStrontium
Sr CelestineSrSO4
Sr GoyaziteSrAl3(PO4)(PO3OH)(OH)6
Sr SvanbergiteSrAl3(PO4)(SO4)(OH)6

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Fernandez, A., Schreurs, G., Villa, I.M., Huber, S., and Rakotondrazafy, M. (2003) Age constraints on the tectonic evolution of the Itremo region in central Madagascar. Precambrian Research: 123: 87-110.
Pezzotta, F.(1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. ExtraLapis nr 17, p.82 [german version, short notice]
Pezzotta, F. (2005) A first attempt to the petrogenesis and the classification of granitic pegmatites of the Itremo Region (central Madagascar). International Meeting on Crystallization Processes in Granitic Pegmatites (Elba) Abstract (www.elba-pegmatites.org).
Hyršl, J. & Praszkier, T. (2015): Neufunde von Japaner-Zwillingen in Madagaskar. Mineralien-Welt. 26 (1), 48-51

Localities in this Region
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Madagascar

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