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:
Mahasoa Est, Betroka, Anosy, Madagascar

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

mindat Locality ID: 207332
mindat URL: http://www.mindat.org/loc-207332.html

Tectonic Settings:

Total number of sublocalities beneath "Mahasoa Est, Betroka, Anosy, Madagascar": 11
Total number of bottom-level sublocalities: 11

Number of Child Localities: 11
Child Localities:
Andangovato
Andangovato Phlogopite Deposit
Androngovato
Benono
Bevoay
Filira Phlogopite Deposit
Haranany
Hazofotsy Phlogopite Deposit
Itrongay (Itrongahy)
Itrongay-Miary Phlogopite Deposit
Manivitsy

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Amorphous	Beryl	Calcite	Clay	Clinozoisite	Corundum	Epidote	Feldspar	Kornerupine	Mica
None	Not in a structural group	Pyroxene	Quartz	Rutile	Sapphirine	Spinel	Titanite	Zircon

Albite ()*	Beryl ()*	Calcite ()*	Cordierite ()*	Corundum ()*
Diopside ()*	Epidote ()*	Grandidierite ()*	Hercynite ()*	Ilmenite ()*
Kornerupine ()*	Opal ()*	Phlogopite ()*	Quartz ()*	Rutile ()*
Sanidine ()*	Sapphirine ()*	Sillimanite ()*	Spinel ()*	Titanite ()*
Zircon ()*

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:

Structural Groups for minerals in this locality:
Amorphous Beryl Calcite Clay Clinozoisite Corundum Epidote Feldspar Kornerupine Mica
None Not in a structural group Pyroxene Quartz Rutile Sapphirine Spinel Titanite Zircon

21 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	467	455	1	78863	8803
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	467	455	1	78863	4286
Calcite ()*	Calcite	Ca(CO₃)	467	455	1	78863	27770
Cordierite ()*	Beryl	Mg₂Al₄Si₅O₁₈			1	78865	1008
Corundum ()*	Corundum	Al₂O₃			1	78865	1797
Diopside ()*	Pyroxene	CaMgSi₂O₆	467	455	3	78861,78862,78863	4135
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	467	455	1	78863	8173
Grandidierite ()*	None	MgAl₃O₂(BO₃)(SiO₄)			1	78865	40
Hercynite ()*	Spinel	Fe²⁺Al₂O₄			1	78865	407
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	467	455	1	78863	5433
Kornerupine ()*	Kornerupine	(Mg,Fe²⁺,Al, )₁₀(Si,Al,B)₅O₂₁(OH,F)₂	467	455	2	78863,78865	68
Opal ()*	Amorphous	SiO₂·nH₂O	467	455	1	78863	2994
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	467	455	6	78856,78860,78861,78862,78863,78864	2273
Quartz ()*	Quartz	SiO₂	467	455	1	78863	61156
Rutile ()*	Rutile	TiO₂	467	455	1	78863	5614
Sanidine ()*	Feldspar	K(AlSi₃O₈)	467	455	3	78855,78858,78863	598
Sapphirine ()*	Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]	467	455	1	78863	129
Sillimanite ()*	Not in a structural group	Al₂SiO₅			1	78865	1516
Spinel ()*	Spinel	MgAl₂O₄	467	455	4	78858,78861,78862,78863	1934
Titanite ()*	Titanite	CaTi(SiO₄)O	467	455	2	78862,78863	4899
Zircon ()*	Zircon	Zr(SiO₄)	467	455	3	78859,78863,78865	5251

2 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	CG169_5_001	463	459	461±2	K-Ca			sanidine				Sanidine			2273	Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascar	Itrongay	Nägler & Villa (2000)	10.1016/S0009-2541(99)00194-1	CG169_5
	CG169_5_002	467	455	461±6	K-Ca			sanidine				Sanidine			2273	Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascar	Itrongay	Nägler & Villa (2000)	10.1016/S0009-2541(99)00194-1	CG169_5

Sample	Source Locality	Reference URL
X050123	Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascar	https://rruff.info/X050123

All locality data graciously provided by mindat.org

All age data...