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:
Stillwater Complex, Sweet Grass Co., Montana, USA

Oldest recorded age at locality: 2912.61
Youngest recorded age at locality: 2188.3

mindat Locality ID: 186274
mindat URL: http://www.mindat.org/loc-186274.html

Tectonic Settings:

Total number of sublocalities beneath "Stillwater Complex, Sweet Grass Co., Montana, USA": 49
Total number of bottom-level sublocalities: 49

Number of Child Localities: 49
Child Localities:
Alaskite Occurrence
Big Group Claims
Blakely Cliffs Occurrence
Bluebird Ni-Cu Occurrence (Cathedral Creek)
Bluebird Occurrence (Blue Bird)
Boulder East Occurrence
Boulder River Ni-Cu East Occurrence
Boulder River Ni-Cu Riverside Occurrence (Riverside Prospect)
Boulder West Occurrence
Chrome Mountain Ni-Cu Occurrence
Coors 602 Occurrence
Crescent Creek Cr-Pt Occurrence
Crescent Creek Ni-Cu Occurrence
Crescent Peak Ni-Cu Occurrence
Dow Occurrence
East Boulder Mine (East Boulder Project Prospect; Frog Pond Adit; Frog Pond Audit; Jack Pine Project; J-M Reef)
East Boulder Plateau Occurrence (Champion Group; Chrome Mountain)
East Boulder River-Chrome Queen Occurrence (Chrome Queen; Forge Creek)
Eve Group
Eve Group Moonlight Group
Forge Ni-Cu Occurrence (Boulder Forge; Placer Basin)
Frog Pond East Occurrence
Frog Pond West Occurrence (J-M Reef)
Gish Mine (M & R Group; Blue Bird Fraction; Dark Group; Lost Shaft; Bonanza Group; Gish Prospects; Boulder River Chromite Deposit)
Ground Hog (Chromium Occurrence; Taylor-Fry-Tuttle Deposit)
Initial Cr-Pt Occurrence
Initial Ni-Cu Occurrence
Iron Creek Prospect
Iron Dike Prospect
Iron Mountain
Iron Mountain Ni-Cu Camp Occurrence
Iron Mountain Ni-Cu Iron Creek Occurrence
Iron Mountain-Chrome Group E
Iron Mountain-Chrome Group W (Chrome Group)
Janet 50 Occurrence
Janet 55W
Majestic & Flora B Claims (McHugh Claim)
Monkey East Camp Zone Occurrence (J-M Reef)
Monkey West Occurrence
Picket Pins Prospect (Picket Pin Occurrence)
Pine Claim
Stillwater Anorthosite Prospect (Stillwater Complex)
Stillwater Mine (Johns-Manville Stillwater Platinum; Stillwater PGM Resources; Stillwater Platinum Project; M Prospect)
Unidentified Occurrence (Map No. 129 Simon; MRDS - 10094325)
Unnamed Gold Prospect (MRDS - 10221843)
West Fork Cr-Pt Tuttle Occurrence
West Fork East Adit Occurrence (J-M Reef)
West Fork G Taylor-Fry Occurrence (West Fork; Fry Dillon; Fry-Taylor; Taylor-Fry-Tuttle)
West Fork West Occurrence

Latitude: 45°25'37"N
Longitude: 110°4'40"W
Decimal Degree (lat, lon): 45.426944444444,-110.07777777778

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	Auricupride	Calcite	Chalcopyrite	Clay	Clinozoisite	Copper	Corundum	Epidote	Melonite
Mica	Nickeline	None	Pentlandite	Perovskite	Potarite	Pyrite	Pyroxene	Quartz	Rocksalt
Sphalerite	Spinel	Stillwaterite	Talc	Ullmannite

Augite ()*	Braggite ()*	Calcite ()*	Chalcopyrite ()*	Chromite ()*
Clinozoisite ()*	Cooperite ()*	Enstatite ()*	Epidote ()*	Erlichmanite ()*
Galena ()*	Gold ()*	Graphite ()*	Hessite ()*	Ilmenite ()*
Keithconnite ()*	Kotulskite ()*	Laurite ()*	Mackinawite ()*	Magnetite ()*
Melonite ()*	Merenskyite ()*	Michenerite ()*	Moncheite ()*	Palarstanide ()*
Pentlandite ()*	Phlogopite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*
Sperrylite ()*	Sphalerite ()*	Stibiopalladinite ()*	Talc ()*	Temagamite ()*
Tetraferroplatinum ()*	Tremolite ()*	Violarite ()*	Vysotskite ()*	Zvyagintsevite ()*

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 Cr Cu Fe H Hg K Mg Ni O Os Pb Pd Pt Ru S Sb Si Sn Te Ti Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Auricupride Calcite Chalcopyrite Clay Clinozoisite Copper Corundum Epidote Melonite
Mica Nickeline None Pentlandite Perovskite Potarite Pyrite Pyroxene Quartz Rocksalt
Sphalerite Spinel Stillwaterite Talc Ullmannite

40 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
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	2906	2681	1	234233	2060
Braggite ()*	None	PdPt₃S₄	2906	2188.3	2	234209,234236	101
Calcite ()*	Calcite	Ca(CO₃)	2906	2681	1	234233	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	2906	2188.3	19	234197,234200,234201,234203,234206,234207,234209,234214,234216,234220,234223,234224,234225,234228,234231,234233,234236,234240,234242	27198
Chromite ()*	Spinel	Fe²⁺Cr₂O₄	2906	2681	12	234194,234196,234198,234205,234210,234211,234217,234219,234223,234227,234241,234242	3902
Clinozoisite ()*	Clinozoisite Epidote	Ca₂Al₃[Si₂O₇][SiO₄]O(OH)	2906	2681	1	234233	1025
Cooperite ()*	None	PtS	2906	2681	1	234209	124
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	2906	2681	2	234209,234233	944
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	2906	2681	2	234209,234233	8173
Erlichmanite ()*	Pyrite	OsS₂	2906	2681	1	234209	110
Galena ()*	Rocksalt	PbS	2906	2681	1	234228	24243
Gold ()*	Copper	Au	2906	2681	2	234223,234228	30554
Graphite ()*	None	C	2906	2681	2	234228,234233	2812
Hessite ()*	None	Ag₂Te	2906	2681	1	234223	804
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	2906	2681	2	234223,234233	5433
Keithconnite ()*	None	Pd₂₀Te₇	2906	2681	1	234233	40
Kotulskite ()*	Nickeline	Pd(Te,Bi)_2-x (x ≈ 0.4)	2906	2681	2	234209,234233	116
Laurite ()*	Pyrite	RuS₂	2906	2681	1	234242	226
Mackinawite ()*	None	(Fe,Ni)_1+xS (x = 0-0.07)	2906	2681	1	234223	451
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	2906	2681	15	234197,234200,234201,234203,234206,234207,234214,234216,234220,234224,234225,234228,234231,234233,234240	14899
Melonite ()*	Melonite	NiTe₂	2906	2681	1	234223	207
Merenskyite ()*	Melonite	PdTe₂	2906	2681	1	234223	155
Michenerite ()*	Ullmannite	PdBiTe	2906	2681	1	234223	114
Moncheite ()*	Melonite	Pt(Te,Bi)₂	2906	2681	2	234209,234233	133
Palarstanide ()*	Stillwaterite	Pd₅(Sn,As)₂	2906	2681	1	234233	13
Pentlandite ()*	Pentlandite	(Ni,Fe)₉S₈	2906	2188.3	19	234197,234200,234201,234203,234206,234207,234209,234214,234216,234220,234223,234224,234225,234228,234231,234233,234236,234240,234242	1512
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	2906	2681	3	234216,234231,234240	2273
Pyrite ()*	Pyrite	FeS₂	2906	2681	7	234209,234216,234223,234228,234231,234233,234240	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	2906	2188.3	18	234197,234200,234201,234203,234206,234207,234209,234214,234216,234220,234223,234224,234225,234228,234231,234233,234236,234240	9056
Quartz ()*	Quartz	SiO₂	2906	2681	1	234233	61156
Sperrylite ()*	Pyrite	PtAs₂	2906	2681	3	234228,234233,234242	337
Sphalerite ()*	Sphalerite	ZnS	2906	2681	1	234228	21482
Stibiopalladinite ()*	None	Pd₅Sb₂	2906	2681	1	234233	75
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	2906	2681	5	234209,234216,234231,234233,234240	3337
Temagamite ()*	None	Pd₃HgTe₃	2906	2681	1	234233	24
Tetraferroplatinum ()*	Potarite	PtFe	2906	2681	1	234209	66
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	2906	2681	5	234209,234216,234231,234233,234240	2562
Violarite ()*	Spinel	FeNi₂S₄	2906	2681	1	234223	380
Vysotskite ()*	None	PdS	2906	2681	1	234209	53
Zvyagintsevite ()*	Auricupride Perovskite	Pd₃Pb	2906	2681	1	234209	32

21 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	Age from other Locality	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
JP35_1717-00001	2906	2754	2830±76	Re-Os		high		81MVL217, 801M02, 355-64-556.0, 355-64-684.5, 355-	Yes	3883	Stillwater Complex, Nye, Stillwater Co., Montana, USA	Stillwater PGE deposit, Montana, USA	Lambert et al. (1994)	10.1093/petrology/35.6.1717	JP35_1717
JP35_1717-00002	2721	2681	2701±20	Sm-Nd		high			Yes	3883	Stillwater Complex, Nye, Stillwater Co., Montana, USA	Stillwater PGE deposit, Montana, USA	Lambert et al. (1994)	10.1093/petrology/35.6.1717	JP35_1717
USGS-Rb-Sr-03133	2912.61	2412.61	2662.61±250	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03134	2841.5	2679.5	2760.5±81	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03135	2832.86	2746.86	2789.86±43	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03136	2891.8	2801.8	2846.8±45	Rb-Sr	age of metamorphic crystallization		whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03137	2912.61	2412.61	2662.61±250	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03138	2681.14	2595.14	2638.14±43	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03139	2912.61	2412.61	2662.61±250	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03140	2841.5	2679.5	2760.5±81	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03141	2832.86	2746.86	2789.86±43	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03142	2891.8	2801.8	2846.8±45	Rb-Sr	age of metamorphic crystallization		whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03143	2912.61	2412.61	2662.61±250	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03144	2841.5	2679.5	2760.5±81	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03145	2832.86	2746.86	2789.86±43	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03146	2891.8	2801.8	2846.8±45	Rb-Sr	age of metamorphic crystallization		whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03147	2912.61	2412.61	2662.61±250	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03148	2841.5	2679.5	2760.5±81	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03149	2832.86	2746.86	2789.86±43	Rb-Sr			whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03150	2891.8	2801.8	2846.8±45	Rb-Sr	age of metamorphic crystallization		whole rock			163974	Pine Claim, Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr
USGS-Rb-Sr-03099	2608.3	2188.3	2398.3±210	Rb-Sr	minimum age of intrusion		whole rock			164889	Stillwater Mine (Johns-Manville Stillwater Platinum; Stillwater PGM Resources; Stillwater Platinum Project; M Prospect), Stillwater Complex, Sweet Grass Co., Montana, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...