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:
Willroy Mine, Gemmell Township, Thunder Bay District, Ontario, Canada

Oldest recorded age at locality: 4000
Youngest recorded age at locality: 2500

mindat Locality ID: 244258
mindat URL: http://www.mindat.org/loc-244258.html

Tectonic Settings:

Total number of sublocalities beneath "Willroy Mine, Gemmell Township, Thunder Bay District, Ontario, Canada": 0
Total number of bottom-level sublocalities: 0

Latitude: 49°9'24"N
Longitude: 85°49'31"W
Decimal Degree (lat, lon): 49.156666666667,-85.825277777778

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.

Acanthite	Amphibole	Calcite	Chalcopyrite	Clay	Clinozoisite	Epidote	Nickeline	None	Pyrite
Pyrosmalite	Quartz	Rocksalt	Sphalerite	Spinel	Wollastonite

Acanthite ()*	Actinolite ()*	Calcite ()*	Chalcopyrite ()*	Epidote ()*
Galena ()*	Magnetite ()*	Pyrite ()*	Pyrosmalite-(Fe) ()*	Pyrrhotite ()*
Quartz ()*	Sphalerite ()*	Wollastonite ()*

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 C Ca Cu Fe H Mg O Pb S Si Zn

Elements from minerals reported directly at this locality: Ag Al C Ca Cu Fe H Mg O Pb S Si Zn

Structural Groups for minerals in this locality:
Acanthite Amphibole Calcite Chalcopyrite Clay Clinozoisite Epidote Nickeline None Pyrite
Pyrosmalite Quartz Rocksalt Sphalerite Spinel Wollastonite

13 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Acanthite ()*	Acanthite	Ag₂S	4000	2500	2793
Actinolite ()*	Amphibole	Ca₂(Mg_4.5-2.5Fe²⁺_0.5-2.5)Si₈O₂₂(OH)₂	4000	2500	3419
Calcite ()*	Calcite	Ca(CO₃)	4000	2500	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	4000	2500	27198
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	4000	2500	8173
Galena ()*	Rocksalt	PbS	4000	2500	24243
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	4000	2500	14899
Pyrite ()*	Pyrite	FeS₂	4000	2500	39462
Pyrosmalite-(Fe) ()*	Pyrosmalite Clay	Fe²⁺₈Si₆O₁₅(OH)₁₀	4000	2500	38
Pyrrhotite ()*	Nickeline	Fe₇S₈	4000	2500	9056
Quartz ()*	Quartz	SiO₂	4000	2500	61156
Sphalerite ()*	Sphalerite	ZnS	4000	2500	21482
Wollastonite ()*	Wollastonite	CaSiO₃	4000	2500	1247

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
	vms-00269	4000	2500	Archean											244258	Willroy Mine, Gemmell Township, Thunder Bay District, Ontario, Canada	Willroy No. 1	Moiser et al. (2009)		USGSOFR2009-1034
	vms-00270	4000	2500	Archean											244258	Willroy Mine, Gemmell Township, Thunder Bay District, Ontario, Canada	Willroy No. 3	Moiser et al. (2009)		USGSOFR2009-1034

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...