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:
Betroka, Anosy, Madagascar

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

mindat Locality ID: 7007
mindat URL: http://www.mindat.org/loc-7007.html

Tectonic Settings:

Total number of sublocalities beneath "Betroka, Anosy, Madagascar": 94
Total number of bottom-level sublocalities: 74

Number of Child Localities: 23
Child Localities:
Ambalasoa
Ambatomivary
Analamary
Andriandampy
Beampombo I
Beapombo II
Bekorobo
Benato Toby
Beronono
Betroka Commune
Iaborotra
Ianabinda
Ianakafy
Isoanala
Ivahona
Jangany
Mahabo
Mahasoa Est
Nanarena Besakoa
Naninora
Sakamahily
Tsaraitso
Vohidava Corundum Deposit

Latitude: 23°29'24"S
Longitude: 45°44'5"E
Decimal Degree (lat, lon): -23.49,45.734722222222

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	Amphibole	Analcime	Baryte	Beryl	Calcite	Chalcopyrite	Clay	Clinozoisite	Corundum
Epidote	Feldspar	Fluorite	Garnet	Gypsum	Kornerupine	Mica	Molybdenite	Nickeline	None
Not in a structural group	Prehnite	Pyrite	Pyrophyllite	Pyroxene	Quartz	Rutile	Sapphirine	Spinel	Talc
Titanite	Zircon

Albite ()*	Analcime ()*	Anhydrite ()*	Anorthite ()*	Augite ()*
Beryl ()*	Calcite ()*	Celestine ()*	Chalcopyrite ()*	Cordierite ()*
Corundum ()*	Diopside ()*	Edenite ()*	Enstatite ()*	Epidote ()*
Ferrohögbomite-2N2S ()*	Fluorite ()*	Grandidierite ()*	Gypsum ()*	Hercynite ()*
Ilmenite ()*	Kornerupine ()*	Laumontite ()*	Magnetite ()*	Molybdenite ()*
Opal ()*	Orthoclase ()*	Phlogopite ()*	Prehnite ()*	Pyrite ()*
Pyrophyllite ()*	Pyrrhotite ()*	Quartz ()*	Rutile ()*	Sanidine ()*
Sapphirine ()*	Sillimanite ()*	Spessartine ()*	Spinel ()*	Talc ()*
Thorianite ()*	Thorite ()*	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 Cu F Fe H K Mg Mn Mo Na O S Si Sr Th Ti Zn Zr

Elements from minerals reported directly at this locality: Al Ca Fe Mg O Si

Structural Groups for minerals in this locality:
Amorphous Amphibole Analcime Baryte Beryl Calcite Chalcopyrite Clay Clinozoisite Corundum
Epidote Feldspar Fluorite Garnet Gypsum Kornerupine Mica Molybdenite Nickeline None
Not in a structural group Prehnite Pyrite Pyrophyllite Pyroxene Quartz Rutile Sapphirine Spinel Talc
Titanite Zircon

44 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
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O			1	78805	1627
Anhydrite ()*	Not in a structural group	Ca(SO₄)			2	78805,78807	1588
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	467	455	0		1036
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	467	455	0		2060
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	467	455	1	78863	4286
Calcite ()*	Calcite	Ca(CO₃)	467	455	10	78788,78805,78807,78816,78827,78829,78830,78838,78839,78863	27770
Celestine ()*	Baryte	Sr(SO₄)			1	78839	1252
Chalcopyrite ()*	Chalcopyrite	CuFeS₂			1	78787	27198
Cordierite ()*	Beryl	Mg₂Al₄Si₅O₁₈			6	78824,78825,78827,78833,78836,78865	1008
Corundum ()*	Corundum	Al₂O₃			7	78782,78803,78824,78827,78836,78865,78872	1797
Diopside ()*	Pyroxene	CaMgSi₂O₆	467	455	11	78787,78795,78802,78805,78811,78827,78838,78861,78862,78863,78867	4135
Edenite ()*	Amphibole	NaCa₂Mg₅(Si₇Al)O₂₂(OH)₂			1	78872	160
Enstatite ()*	Pyroxene	Mg₂Si₂O₆			2	78824,78827	944
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	467	455	2	78818,78863	8173
Ferrohögbomite-2N2S ()*	None	(Fe,Mg,Zn,Al)₃(Al,Ti,Fe)₈O₁₅(OH)			1	78782	13
Fluorite ()*	Fluorite	CaF₂			2	78787,78805	9617
Grandidierite ()*	None	MgAl₃O₂(BO₃)(SiO₄)			1	78865	40
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O			1	78805	6890
Hercynite ()*	Spinel	Fe²⁺Al₂O₄			2	78803,78865	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	4	78827,78833,78863,78865	68
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O			1	78805	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			2	78803,78825	14899
Molybdenite ()*	Molybdenite	MoS₂			3	78787,78802,78805	5800
Opal ()*	Amorphous	SiO₂·nH₂O	467	455	2	78805,78863	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)			1	78819	2349
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	467	455	52	78780,78781,78787,78790,78792,78793,78796,78797,78798,78799,78800,78802,78805,78806,78807,78808,78809,78813,78815,78816,78817,78820,78821,78822,78823,78824,78825,78826,78827,78828,78829,78830,78833,78836,78837,78838,78839,78844,78845,78846,78847,78848,78849,78850,78851,78856,78860,78861,78862,78863,78864,78867	2273
Prehnite ()*	Prehnite	Ca₂Al(Si₃Al)O₁₀(OH)₂			3	78787,78802,78805	1898
Pyrite ()*	Pyrite	FeS₂			4	78787,78805,78824,78848	39462
Pyrophyllite ()*	Clay Pyrophyllite	Al₂Si₄O₁₀(OH)₂			1	78802	771
Pyrrhotite ()*	Nickeline	Fe₇S₈			2	78787,78805	9056
Quartz ()*	Quartz	SiO₂	467	455	4	78803,78824,78834,78863	61156
Rutile ()*	Rutile	TiO₂	467	455	2	78836,78863	5614
Sanidine ()*	Feldspar	K(AlSi₃O₈)	467	455	4	78834,78855,78858,78863	598
Sapphirine ()*	Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]	467	455	9	78824,78825,78827,78829,78833,78836,78853,78863,78872	129
Sillimanite ()*	Not in a structural group	Al₂SiO₅			4	78803,78824,78827,78865	1516
Spessartine ()*	Garnet	Mn²⁺₃Al₂(SiO₄)₃			1	78787	1214
Spinel ()*	Spinel	MgAl₂O₄	467	455	19	78780,78781,78782,78788,78805,78811,78824,78827,78833,78836,78841,78845,78846,78848,78858,78861,78862,78863,78872	1934
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂			1	78848	3337
Thorianite ()*	Fluorite	ThO₂			1	78787	236
Thorite ()*	Zircon	Th(SiO₄)			1	78810	1006
Titanite ()*	Titanite	CaTi(SiO₄)O	467	455	5	78785,78787,78805,78862,78863	4899
Zircon ()*	Zircon	Zr(SiO₄)	467	455	7	78786,78805,78824,78833,78859,78863,78865	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
FKM-28	Betroka, Anosy, Madagascar	https://www.rockptx.com/fkm-26-to-fkm-50/#FKM-28
R110063	Betroka, Anosy, Madagascar	https://rruff.info/R110063
X050123	Itrongay (Itrongahy), Mahasoa Est, Betroka, Anosy, Madagascar	https://rruff.info/X050123

All locality data graciously provided by mindat.org

All age data...