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:
Spar Lake Deposit (Troy Prospect), Troy Mining District, Lincoln Co., Montana, USA

Oldest recorded age at locality: 1500
Youngest recorded age at locality: 1500

mindat Locality ID: 164790
mindat URL: http://www.mindat.org/loc-164790.html

Tectonic Settings:

Total number of sublocalities beneath "Spar Lake Deposit (Troy Prospect), Troy Mining District, Lincoln Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 48°13'46"N
Longitude: 115°53'55"W
Decimal Degree (lat, lon): 48.229444444444,-115.89861111111

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	Baryte	Calcite	Chalcopyrite	Clay	Cobaltite	Copper	Corundum	Covellite	Digenite
Feldspar	Mica	Nickeline	None	Pentlandite	Pyrite	Rocksalt	Sphalerite	Spinel	Stannite
Tetrahedrite

Acanthite ()*	Albite ()*	Ankerite ()*	Baryte ()*	Bornite ()*
Calcite ()*	Chalcocite ()*	Chalcopyrite ()*	Cobaltite ()*	Covellite ()*
Digenite ()*	Dolomite ()*	Galena ()*	Hematite ()*	Idaite ()*
Ilmenite ()*	Magnetite ()*	Muscovite ()*	Pentlandite ()*	Pyrite ()*
Pyrrhotite ()*	Silver ()*	Sphalerite ()*	Stromeyerite ()*	Tetrahedrite-(Zn) ()*

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 Ba C Ca Co Cu Fe H K Mg Na Ni O Pb S Sb Si Ti Zn

Elements from minerals reported directly at this locality: Ag Al As Ba C Ca Co Cu Fe H K Mg Na Ni O Pb S Sb Si Ti Zn

Structural Groups for minerals in this locality:
Acanthite Baryte Calcite Chalcopyrite Clay Cobaltite Copper Corundum Covellite Digenite
Feldspar Mica Nickeline None Pentlandite Pyrite Rocksalt Sphalerite Spinel Stannite
Tetrahedrite

25 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Acanthite ()*	Acanthite	Ag₂S	1500	1500	2793
Albite ()*	Feldspar	Na(AlSi₃O₈)	1500	1500	8803
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	1500	1500	3092
Baryte ()*	Baryte	Ba(SO₄)	1500	1500	11547
Bornite ()*	None	Cu₅FeS₄	1500	1500	5516
Calcite ()*	Calcite	Ca(CO₃)	1500	1500	27770
Chalcocite ()*	None	Cu₂S	1500	1500	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	1500	1500	27198
Cobaltite ()*	Cobaltite	CoAsS	1500	1500	966
Covellite ()*	Covellite	CuS	1500	1500	4165
Digenite ()*	Digenite	Cu_1.8S	1500	1500	1027
Dolomite ()*	None	CaMg(CO₃)₂	1500	1500	9895
Galena ()*	Rocksalt	PbS	1500	1500	24243
Hematite ()*	Corundum	Fe₂O₃	1500	1500	14640
Idaite ()*	Stannite Sphalerite	Cu₃FeS₄	1500	1500	142
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	1500	1500	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1500	1500	14899
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1500	1500	17380
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	1500	1500	1512
Pyrite ()*	Pyrite	FeS₂	1500	1500	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	1500	1500	9056
Silver ()*	Copper	Ag	1500	1500	5186
Sphalerite ()*	Sphalerite	ZnS	1500	1500	21482
Stromeyerite ()*	None	CuAgS	1500	1500	332
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	1500	1500	5317

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
	sedcu-00676	1500	1500	M. Proterozoic										Cu	164790	Spar Lake Deposit (Troy Prospect), Troy Mining District, Lincoln Co., Montana, USA	Spar Lake	Cox et al. (2003)		USGSOFR03_107

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...