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:
Fortaleza De Minas, Minas Gerais, Brazil

Oldest recorded age at locality: 2700
Youngest recorded age at locality: 2700

mindat Locality ID: 225026
mindat URL: http://www.mindat.org/loc-225026.html

Tectonic Settings:

Total number of sublocalities beneath "Fortaleza De Minas, Minas Gerais, Brazil": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
O'Toole Deposit

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.

Amphibole	Arsenic	Arsenopyrite	Chalcopyrite	Clay	Cobaltite	Copper	Corundum	Löllingite	Marcasite
Melonite	Nickeline	None	Pentlandite	Pyrite	Quartz	Sphalerite	Spinel	Talc	Titanite
Valleriite

Actinolite ()*	Arsenopyrite ()*	Bismuth ()*	Chalcopyrite ()*	Cobaltite ()*
Gold ()*	Graphite ()*	Hematite ()*	Ilmenite ()*	Irarsite ()*
Kotulskite ()*	Mackinawite ()*	Magnetite ()*	Marcasite ()*	Maucherite ()*
Melonite ()*	Merenskyite ()*	Nickeline ()*	Omeiite ()*	Osarsite ()*
Gersdorffite-Pa3 ()*	Pentlandite ()*	Platinum ()*	Pyrite ()*	Pyrrhotite ()*
Quartz ()*	Rheniite ()*	Silver ()*	Sperrylite ()*	Sphalerite ()*
Talc ()*	Titanite ()*	Tremolite ()*	Valleriite ()*	Violarite ()*

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: Ag Al As Au Bi C Ca Co Cu Fe H Ir Mg Ni O Os Pd Pt Re S Si Te Ti Zn

Elements from minerals reported directly at this locality: O Pd Si Te

Structural Groups for minerals in this locality:
Amphibole Arsenic Arsenopyrite Chalcopyrite Clay Cobaltite Copper Corundum Löllingite Marcasite
Melonite Nickeline None Pentlandite Pyrite Quartz Sphalerite Spinel Talc Titanite
Valleriite

35 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
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	2700	2700	1	27723	3419
Arsenopyrite ()*	Arsenopyrite	FeAsS	2700	2700	1	27723	9052
Bismuth ()*	Arsenic	Bi	2700	2700	1	27723	1966
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	2700	2700	1	27723	27198
Cobaltite ()*	Cobaltite	CoAsS	2700	2700	1	27723	966
Gold ()*	Copper	Au	2700	2700	1	27723	30554
Graphite ()*	None	C	2700	2700	1	27723	2812
Hematite ()*	Corundum	Fe₂O₃	2700	2700	1	27723	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	2700	2700	1	27723	5433
Irarsite ()*	Pyrite	IrAsS	2700	2700	1	27723	154
Kotulskite ()*	Nickeline	Pd(Te,Bi)_2-x (x ≈ 0.4)	2700	2700	1	27723	116
Mackinawite ()*	None	(Fe,Ni)_1+xS (x = 0-0.07)	2700	2700	1	27723	451
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	2700	2700	1	27723	14899
Marcasite ()*	Marcasite	FeS₂	2700	2700	1	27723	5674
Maucherite ()*	None	Ni₁₁As₈	2700	2700	1	27723	161
Melonite ()*	Melonite	NiTe₂	2700	2700	1	27723	207
Merenskyite ()*	Melonite	PdTe₂	2700	2700	0		155
Nickeline ()*	Nickeline	NiAs	2700	2700	1	27723	633
Omeiite ()*	Löllingite	OsAs₂	2700	2700	1	27723	7
Osarsite ()*	Arsenopyrite	OsAsS	2700	2700	1	27723	16
Gersdorffite-Pa3 ()*	Pyrite	NiAsS	2700	2700	1	27723	767
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	2700	2700	1	27723	1512
Platinum ()*	Copper	Pt	2700	2700	1	27723	485
Pyrite ()*	Pyrite	FeS₂	2700	2700	1	27723	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	2700	2700	1	27723	9056
Quartz ()*	Quartz	SiO₂	2700	2700	0		61156
Rheniite ()*	None	ReS₂	2700	2700	1	27723	8
Silver ()*	Copper	Ag	2700	2700	1	27723	5186
Sperrylite ()*	Pyrite	PtAs₂	2700	2700	1	27723	337
Sphalerite ()*	Sphalerite	ZnS	2700	2700	1	27723	21482
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	2700	2700	1	27723	3337
Titanite ()*	Titanite	CaTi(SiO₄)O	2700	2700	1	27723	4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	2700	2700	1	27723	2562
Valleriite ()*	Valleriite	2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)₂]	2700	2700	1	27723	237
Violarite ()*	Spinel	FeNi₂S₄	2700	2700	1	27723	380

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_663	Ni-Cu sulfides in komatiite

1 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
	Michelle_663	2700	2700	>2700		Age of deposit or general age of the metallogenic province								Ni, Cu	159621	O'Toole Deposit, Fortaleza De Minas, Minas Gerais, Brazil	O'Toole	Hoatson et al. (2006)	10.1016/j.oregeorev.2006.05.002	OGR29_177	See Table. 1 Global resources of nickel metal and ages of the major nickel sulfide deposits of the world. Age can refer to the age of a specific nickel sulfide deposit, or the general age of the metallogenic province containing nickel deposits that are similar to a dated deposit (e.g. 2705 Ma Komatiite-hosted deposits in the Eastern Goldfields Province).

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...