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:
Libby Mining District (Snowshoe Mining District), Lincoln Co., Montana, USA

Oldest recorded age at locality: 94
Youngest recorded age at locality: 94

mindat Locality ID: 50276
mindat URL: http://www.mindat.org/loc-50276.html

Tectonic Settings:

Total number of sublocalities beneath "Libby Mining District (Snowshoe Mining District), Lincoln Co., Montana, USA": 42
Total number of bottom-level sublocalities: 41

Number of Child Localities: 41
Child Localities:
Alpine Placer
Big Cherry Creek Placer
Big Sky
Bolyard Placer
Cableway Group (Halfmoon)
Comet Placer
Copper Reward Prospect (Copper Reward Mine)
Copper-Iron Occurrence (MRDS - 10281137)
Diamond John Prospect
Fairbault Prospect
Ford Placer
Giant Sunrise (Montana Sunrise)
Glacier Silver-Lead (Hazel T.; Lukens-Hazel Mine)
Grizzly Prospect (McDonald; Missouri Group)
Harry Howard Placer
Howard Creek Claim
John Bull-Uncle Sam Mine
John Francis Claims
Leigh Creek
Libby
Libby Creek Gold Mining Company
Libby Creek Placers
Libby; Snowshoe
Midas Mine
Missouri Prospect
Montana Placer
Montana Silver-Lead
Mustang Mine
Nugget Placer
Red Gulch Placer
Remp Prospect (Silver Ghost)
Seattle Prospect
Silver Cable Prospect
Silvertip Prospect (Index; Dreadnaught; O. H. Howard Prospect)
Snowshoe Mine (Howard)
St Paul
Statesman Prospect
Texas Ranger Group
Unnamed Copper Occurrence (MRDS - 10245610)
Unnamed Gold Occurrence (MRDS - 10173310)
Zollars Prospect

Latitude: 48°11'44"N
Longitude: 115°35'57"W
Decimal Degree (lat, lon): 48.195555555556,-115.59916666667

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.

Allophane	Amphibole	Apatite	Aragonite	Arsenopyrite	Baryte	Calcite	Chalcopyrite	Clay	Copper
Corrensite	Feldspar	Fluorite	Malachite	Nickeline	None	Not in a structural group	Pyrite	Pyroxene	Quartz
Rocksalt	Rutile	Scheelite	Serpentine	Smectite-vermiculite	Sphalerite	Spinel	Talc	Tetrahedrite	Titanite

Aegirine ()*	Aegirine-augite ()*	Albite ()*	Anglesite ()*	Arsenopyrite ()*
Augite ()*	Azurite ()*	Baryte ()*	Calcite ()*	Celestine ()*
Chalcopyrite ()*	Chrysocolla ()*	Chrysotile ()*	Diopside ()*	Dolomite ()*
Fluorapatite ()*	Fluorite ()*	Galena ()*	Gold ()*	Hydrobiotite ()*
Magnesio-arfvedsonite ()*	Magnesio-riebeckite ()*	Magnetite ()*	Malachite ()*	Microcline ()*
Orthoclase ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Richterite ()*
Rutile ()*	Scheelite ()*	Siderite ()*	Sphalerite ()*	Strontianite ()*
Talc ()*	Tetrahedrite-(Zn) ()*	Titanite ()*	Tremolite ()*	Vermiculite ()*
Winchite ()*

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 As Au Ba C Ca Cu F Fe H K Mg Na O P Pb S Sb Si Sr Ti W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allophane Amphibole Apatite Aragonite Arsenopyrite Baryte Calcite Chalcopyrite Clay Copper
Corrensite Feldspar Fluorite Malachite Nickeline None Not in a structural group Pyrite Pyroxene Quartz
Rocksalt Rutile Scheelite Serpentine Smectite-vermiculite Sphalerite Spinel Talc Tetrahedrite Titanite

41 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
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	94	94	1	230579	1022
Aegirine-augite ()*	Pyroxene	(Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si₂O₆	94	94	1	230579	286
Albite ()*	Feldspar	Na(AlSi₃O₈)	94	94	1	230579	8803
Anglesite ()*	Baryte	Pb(SO₄)			1	230565	2734
Arsenopyrite ()*	Arsenopyrite	FeAsS			1	230565	9052
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	94	94	1	230579	2060
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂			1	230565	5509
Baryte ()*	Baryte	Ba(SO₄)	94	94	1	230579	11547
Calcite ()*	Calcite	Ca(CO₃)	94	94	1	230579	27770
Celestine ()*	Baryte	Sr(SO₄)	94	94	1	230579	1252
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	94	94	3	230579,230583,230594	27198
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	94	94	1	230579	3531
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	94	94	1	230579	951
Diopside ()*	Pyroxene	CaMgSi₂O₆	94	94	1	230579	4135
Dolomite ()*	None	CaMg(CO₃)₂	94	94	1	230579	9895
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	94	94	1	230579	2740
Fluorite ()*	Fluorite	CaF₂	94	94	1	230579	9617
Galena ()*	Rocksalt	PbS	94	94	4	230565,230579,230582,230583	24243
Gold ()*	Copper	Au			2	230581,230583	30554
Hydrobiotite ()*	Corrensite Clay	K(Mg,Fe²⁺)₆(Si,Al)₈O₂₀(OH)₄·nH₂O	94	94	1	230579	49
Magnesio-arfvedsonite ()*	Amphibole	NaNa₂(Mg₄Fe³⁺)Si₈O₂₂(OH)₂	94	94	1	230579	79
Magnesio-riebeckite ()*	Amphibole	Na₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂	94	94	1	230579	93
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	94	94	1	230579	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂			2	230565,230583	12537
Microcline ()*	Feldspar	K(AlSi₃O₈)	94	94	1	230579	4924
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	94	94	1	230579	2349
Pyrite ()*	Pyrite	FeS₂	94	94	3	230565,230579,230594	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	94	94	1	230579	9056
Quartz ()*	Quartz	SiO₂	94	94	2	230579,230594	61156
Richterite ()*	Amphibole	Na(NaCa)Mg₅Si₈O₂₂(OH)₂	94	94	1	230579	148
Rutile ()*	Rutile	TiO₂	94	94	1	230579	5614
Scheelite ()*	Scheelite	Ca(WO₄)			1	230583	4894
Siderite ()*	Calcite	Fe(CO₃)			1	230594	6417
Sphalerite ()*	Sphalerite	ZnS	94	94	4	230565,230579,230583,230594	21482
Strontianite ()*	Aragonite	Sr(CO₃)	94	94	1	230579	589
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	94	94	1	230579	3337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃			1	230583	5317
Titanite ()*	Titanite	CaTi(SiO₄)O	94	94	1	230579	4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	94	94	1	230579	2562
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O	94	94	1	230579	652
Winchite ()*	Amphibole	(NaCa)(Mg₄Al)Si₈O₂₂(OH)₂	94	94	1	230579	51

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000702	ASSOCIATED SILICATE ROCKS: Pyroxenite, biotitite, nepheline syenite, syenite, quartz syenite.

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
	Jen_0000702	94	94	94	Rb-Sr			biotite							29899	Rainy Creek Mine (W. R. Grace Mine), Libby, Libby Mining District (Snowshoe Mining District), Lincoln Co., Montana, USA	Rainy Creek	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL
R050485	Libby, Libby Mining District (Snowshoe Mining District), Lincoln Co., Montana, USA	https://rruff.info/R050485

All locality data graciously provided by mindat.org

All age data...