Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascar

Oldest recorded age at locality: 467
Youngest recorded age at locality: 455

mindat Locality ID: 2273
mindat URL: http://www.mindat.org/loc-2273.html

Tectonic Settings:

Total number of sublocalities beneath "Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascar": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al B Be C Ca F Fe H K Mg Na O Si Ti Zr 

Elements from minerals reported directly at this locality: Al B Be C Ca F Fe H K Mg Na O Si Ti Zr 

Structural Groups for minerals in this locality: 
AmorphousBerylCalciteClayClinozoisiteCorundumEpidoteFeldsparKornerupineMica
NonePyroxeneQuartzRutileSapphirineSpinelTitaniteZircon

16 IMA Minerals at location:
Albite  (*)Beryl  (*)Calcite  (*)Diopside  (*)Epidote  (*)
Ilmenite  (*)Kornerupine  (*)Opal  (*)Phlogopite  (*)Quartz  (*)
Rutile  (*)Sanidine  (*)Sapphirine  (*)Spinel  (*)Titanite  (*)
Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Albite  (*)FeldsparNa(AlSi3O8)46745508803
Beryl  (*)BerylBe3Al2Si6O1846745504286
Calcite  (*)CalciteCa(CO3)467455027770
Diopside  (*)PyroxeneCaMgSi2O646745504135
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)46745508173
Ilmenite  (*)CorundumFe2+Ti4+O346745505433
Kornerupine  (*)Kornerupine(Mg,Fe2+,Al,   )10(Si,Al,B)5O21(OH,F)2467455068
Opal  (*)AmorphousSiO2·nH2O46745502994
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)246745502273
Quartz  (*)QuartzSiO2467455061156
Rutile  (*)RutileTiO246745505614
Sanidine  (*)FeldsparK(AlSi3O8)4674550598
Sapphirine  (*)SapphirineMg4(Mg3Al9)O4[Si3Al9O36]4674550129
Spinel  (*)SpinelMgAl2O446745501934
Titanite  (*)TitaniteCaTi(SiO4)O46745504899
Zircon  (*)ZirconZr(SiO4)46745505251


2 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
CG169_5_001463459461±2K-Ca sanidine   Sanidine  2273Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, MadagascarItrongayNägler & Villa (2000)10.1016/S0009-2541(99)00194-1CG169_5 
CG169_5_002467455461±6K-Ca sanidine   Sanidine  2273Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, MadagascarItrongayNägler & Villa (2000)10.1016/S0009-2541(99)00194-1CG169_5 

SampleSource LocalityReference URL
X050123Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascarhttps://rruff.info/X050123

All locality data graciously provided by mindat.org

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