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:
Boulder County Tungsten District, Boulder Co., Colorado, USA

Oldest recorded age at locality: 1653
Youngest recorded age at locality: 935

mindat Locality ID: 134313
mindat URL: http://www.mindat.org/loc-134313.html

Tectonic Settings:

Total number of sublocalities beneath "Boulder County Tungsten District, Boulder Co., Colorado, USA": 158
Total number of bottom-level sublocalities: 156

Number of Child Localities: 156
Child Localities:
1903
Amy Paul
Anna C. Mine (Vacant Spot; Minnie Foy; Lone Pine; Beddig; Oregon; Niagara; Denver; Illinois; Greyback; Sunset Sisson; Spiderleg; Conger; Quay)
Arrow 1; 2; 3 Occurrence
Aztec
Barker (Barker Tunnel)
Barker No. 3
Bettig Mine
Big Cameron
Big Six
Birds Nest And Village Belle
Black Ace Claims
Black Hawk No. 1 Vein
Black Hawk No. 2 Vein
Black Iron Occurrence (Mammoth; Sunday; Mary Nelson; March; Tungsten; Elsie And Windy Tunnel; Tungsten Mtn. Nos. 6 & 9; Fitzsimmons No. 1)
Black King
Black River
Black Rose (12; 13; Rocky Mountain; Rogers No. 2; Blue Bell; Crackerjack; Black Squirrel)
Black Rover
Bobcat Occurrence (Mud Lake; Greenhorn; Philip Extension; Richard; Lone Tree; Crow; Nabob; Rake Off; Corkscrew)
Brace (Brace Tunnel)
Catastrophe
Chavez Mine
Clara
Clark Tunnel
Cold Spring Mine
Colorado Springs Tungsten Placer
Conger Mine
Copeland Mines (Copeland Group Of Mines)
Crete
Cross Mine
Cross No. 4
Cross Prospect (Cross No. 2; Holy Cross)
Cross Spider Mine
Crow No. 36
Crownpoint
Crucible Steel
Dillon
Dozer
Early Spring
Empress (Sylvan Ute)
Eureka Mine (Eureka Alta)
F. G. Watrous Tungsten Prospect
Fair Count Vein Occurrence
Fitzgerald
Fitzsimons No. One
Floyd
Fraction Lode (June; Lord Byron; Catastrophe; Evening Post Occurrence)
Gale Mine
Gem
Georgia A. Mine
Gold Coin
Good Friday Mine
Greenhorn
Greyback
Herald Occurrence
Herold
Hershoc (Comstock; Holland & Roxburg Lodes Occurrence)
Hildegarde (Oregon Occurrence)
Home Run
Hoosier Extension
Hoosier Mine
Horseshoe Comstock Holland Roxbury
Hugo Mine
Hugo Ranch (Hugo No. 2; Hugo Ranch Tungsten Property)
Hummer
Hurricane
Illinois (Quay)
Iron Dyke
Jack And Summit
Jap
Jay Bird
Kekionga Mine
Kicker
Lady Luck Occurrence (Protection; Bluebird; Exchange; Hillside; Columbine; Miser's Tunnel; Little Jack; Little Major; Rudy No. 2; Long Tunnel; Iowa)
Lake
Last Chance (Nancy Henderson; Forest Home; Cold Spring Veins Occurrence)
Lawrence
Lily
Long Shot
Lookout Occurrence (Pleasant Dream Annie L.; Balmoral; April Fool; Smith; Little Lester; Parker; Luckie No. 2; March Wind-Red Bird)
Lost Lake Lode Occurrence
Luckie 2 (Luckie 2 Tungsten; Luckie 3; Smith)
Ma W
Mackenzie
Mammoth
Manchester
May Flower Occurrence (Golden Harp; Cumberland; Rocky Mtn. Mammoth; Maud S.; Anna Clara; Bull Domingo)
McKenzie Tunnel (Big Six; Charley; Lonesome Polecat; Townlot Occurrence)
Minnie And Ohio Occurrence
Minnie Foy Mine
Misers Delight Mine
Misers Dream
Missing Link Occurrence (Roderick; Cross No. 2; Rambler-Lower Rambler; Minnesota; Brace Tract; Tennessee; Blackhalk)
Mock Shaft Occurrence (Big Six Mine)
Mogul Tunnel Occurrence
Niagra
No. 4
Norway
One And Three Quarters
Oneonta
Paymaster-Wheelman Tunnel Occurrence (Black Crystal; Black Prince; Mac Group; Pennsylvania)
Peewink Mountain Tunnel
Peewink Tungsten Blowout
Pennsylvania Lode Occurrence
Philadelphia
Phillip (Phillip Extension; Lone Tree; Rake Off)
Piddler
Poop-Out Claims
Post Boy
Poupout
Primos Mine
Primp
Quaker City; Ophir; Pennsylvania; Peewink
Rambler
Range View Mine
Red Signe Mine
Ridge
Rogers No. 1; 2; 3-5; 7-11 Occurrence
Roose Tunnel Occurrence
Roslyn
Silent Friend
Silver Queen
Sister Emma
Spider Leg
St Elmo
Steele Plate Tungsten
Sunday Vein Occurrence
Tanner
Ten
Tenderfoot
Terror
Town Lot
Trail & Diamond Claims
Tungsten Group (Tungsten Claims)
Tungsten King
Tungsten Lode Mine
Unknown Gold - Tungsten Occurrence (MRDS - 10091282)
Unknown Molybdenum Occurrence (MRDS - 10017284)
Unknown Molybdenum Occurrence (MRDS - 10017365)
Unknown Molybdenum Occurrence (MRDS - 10018001)
Unknown Tungsten Occurrence (MRDS - 10017297)
Vasco No. 1 Mine
Vasco No. 2 & 5
Vasco No. 6
Vasco No. 8; Barker Nos. 1; 2; 4; Bonanza; Clark Tunnel Occurrence
Vasco Nos. 4; 10 (Cross No. 1)
Walker Ranch
Western Star
White
Wild Tiger Mine
Wilderness (Wilderness 2 & 3 Great Northern M.S.; Great Northern 1-15 Occurrence)
William E. Walker Mine
Wisconsin
World Mine
X Ray And Sherly

Latitude: 39°58'42"N
Longitude: 105°28'9"W
Decimal Degree (lat, lon): 39.978333333333,-105.46916666667

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.

Alunite	Amorphous	Arsenopyrite	Baryte	Calcite	Chalcopyrite	Clay	Columbite	Copper	Corundum
Kaolinite	Lillianite	Marcasite	Melonite	Mica	Molybdenite	None	Pyrite	Pyrochlore	Quartz
Rocksalt	Scheelite	Smectite-vermiculite	Sphalerite	Stannite	Tetrahedrite	Tungstite

Ankerite ()*	Arsenopyrite ()*	Baryte ()*	Beidellite ()*	Calcite ()*
Chalcopyrite ()*	Coloradoite ()*	Dickite ()*	Famatinite ()*	Ferberite ()*
Fizélyite ()*	Galena ()*	Gold ()*	Goyazite ()*	Graphite ()*
Hematite ()*	Hübnerite ()*	Hydrokenoelsmoreite ()*	Ilsemannite ()*	Kaolinite ()*
Marcasite ()*	Melonite ()*	Molybdenite ()*	Muscovite ()*	Opal ()*
Pyrite ()*	Quartz ()*	Roscoelite ()*	Scheelite ()*	Sphalerite ()*
Stromeyerite ()*	Stützite ()*	Sylvanite ()*	Tetrahedrite-(Zn) ()*	Tungstite ()*

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 Ba C Ca Cu Fe H Hg K Mn Mo Na Ni O P Pb S Sb Si Sr Te V W Zn

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Alunite Amorphous Arsenopyrite Baryte Calcite Chalcopyrite Clay Columbite Copper Corundum
Kaolinite Lillianite Marcasite Melonite Mica Molybdenite None Pyrite Pyrochlore Quartz
Rocksalt Scheelite Smectite-vermiculite Sphalerite Stannite Tetrahedrite Tungstite

35 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	1	184332	3092
Arsenopyrite ()*	Arsenopyrite	FeAsS	1	184308	9052
Baryte ()*	Baryte	Ba(SO₄)	2	184403,184411	11547
Beidellite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3Al₂(Si,Al)₄O₁₀(OH)₂·nH₂O	1	184332	85
Calcite ()*	Calcite	Ca(CO₃)	1	184334	27770
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	2	184337,184435	27198
Coloradoite ()*	Sphalerite	HgTe	1	184347	169
Dickite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	2	184332,184348	651
Famatinite ()*	Stannite Sphalerite	Cu₃SbS₄	1	184337	163
Ferberite ()*	Columbite	Fe²⁺(WO₄)	43	184308,184311,184313,184318,184319,184320,184326,184332,184334,184337,184340,184341,184348,184354,184357,184359,184362,184368,184381,184386,184393,184394,184399,184401,184402,184409,184410,184411,184412,184413,184414,184416,184423,184424,184426,184434,184440,184442,184444,184450,184451,184452,184462	551
Fizélyite ()*	Lillianite	Ag₅Pb₁₄Sb₂₁S₄₈	1	184379	54
Galena ()*	Rocksalt	PbS	1	184426	24243
Gold ()*	Copper	Au	5	184348,184362,184409,184421,184445	30554
Goyazite ()*	Alunite	SrAl₃(PO₄)(PO₃OH)(OH)₆	1	184332	173
Graphite ()*	None	C	1	184334	2812
Hematite ()*	Corundum	Fe₂O₃	4	184318,184332,184348,184426	14640
Hübnerite ()*	Columbite	Mn²⁺(WO₄)	1	184383	469
Hydrokenoelsmoreite ()*	Pyrochlore	₂W₂O₆(H₂O)	1	184348	57
Ilsemannite ()*	None	Mo₃O₈·nH₂O (?)	1	184403	123
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	4	184348,184393,184410,184411	5591
Marcasite ()*	Marcasite	FeS₂	2	184308,184313	5674
Melonite ()*	Melonite	NiTe₂	2	184347,184458	207
Molybdenite ()*	Molybdenite	MoS₂	6	184334,184403,184435,184446,184447,184448	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	1	184332	17380
Opal ()*	Amorphous	SiO₂·nH₂O	1	184318	2994
Pyrite ()*	Pyrite	FeS₂	3	184332,184334,184426	39462
Quartz ()*	Quartz	SiO₂	13	184313,184318,184326,184332,184334,184340,184348,184357,184359,184410,184411,184426,184452	61156
Roscoelite ()*	Mica	KV³⁺₂(Si₃Al)O₁₀(OH)₂	1	184403	253
Scheelite ()*	Scheelite	Ca(WO₄)	6	184348,184381,184399,184426,184435,184450	4894
Sphalerite ()*	Sphalerite	ZnS	2	184313,184337	21482
Stromeyerite ()*	None	CuAgS	1	184337	332
Stützite ()*	None	Ag_5-xTe₃ (x = 0.24-0.36)	1	184347	92
Sylvanite ()*	Melonite	AgAuTe₄	4	184347,184362,184409,184424	337
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	2	184337,184348	5317
Tungstite ()*	Tungstite	WO₃·H₂O	1	184401	118

12 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
USGS-U-Th-Pb-02102_206_238	1414	1414	1414	206_238	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02102_207_206	1653	1653	1653	207_206	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02102_207_235	1512	1512	1512	207_235	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02103_206_238	1353	1353	1353	206_238	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02103_207_206	1646	1646	1646	207_206	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02103_207_235	1471	1471	1471	207_235	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02104_206_238	1179	1179	1179	206_238	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02104_207_206	1629	1629	1629	207_206	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02104_207_235	1349	1349	1349	207_235	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02105_206_238	935	935	935	206_238	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02105_207_206	1591	1591	1591	207_206	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb
USGS-U-Th-Pb-02105_207_235	1154	1154	1154	207_235	age of intrusion	zircon	Zircon	110604	Walker Ranch, Boulder County Tungsten District, Boulder Co., Colorado, USA	USGS-U-Th-Pb	USGS-U-Th-Pb

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...