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Kirk Mine, Quartz Hill, Central City District, Gilpin Co., Colorado, USA

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Latitude & Longitude (WGS84): 39° 47' 15'' North , 105° 32' 0'' West
Latitude & Longitude (decimal): 39.78753,-105.53334
GeoHash:G#: 9xhfqe0gn
Locality type:Mine
Age:~4600 to 541 ± 1.0 Ma
Geologic Time:Precambrian
Reference for age:Sims, P.K. and others (1963) Geology of Uranium and Associated Ore Deposits Central Part of the Front Range Mineral Belt Colorado. U.S. Geological Survey Professional Paper 371, prepared on behalf of the U.S. Atomic Energy Commission.
Köppen climate type:Dfc : Subarctic climate


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Regions containing this locality

Rocky Mountains, North America

Mountain Range - 2,058 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


12 valid minerals.

Detailed Mineral List:

Chalcocite
Formula: Cu2S
Reference: U.S. Geological Survey Professional Paper 371
Chalcopyrite
Formula: CuFeS2
Reference: U.S. Geological Survey Professional Paper 371
Enargite
Formula: Cu3AsS4
Reference: Minerals of Colorado (1997) Eckel, E. B.
Galena
Formula: PbS
Reference: U.S. Geological Survey Professional Paper 371
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey Professional Paper 371
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey Professional Paper 371
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey Professional Paper 371
Quartz
Formula: SiO2
Reference: U.S. Geological Survey Professional Paper 371
Sphalerite
Formula: ZnS
Reference: U.S. Geological Survey Professional Paper 371
Tennantite
Formula: Cu6[Cu4(Fe,Zn)2]As4S13
Reference: U.S. Geological Survey Professional Paper 371
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: U.S. Geological Survey Professional Paper 371
Uraninite
Formula: UO2
Reference: Van King
Uraninite var: Pitchblende
Formula: UO2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey Professional Paper 371; USGS Trace Elements Investigations #433
Zippeite
Formula: K3(UO2)4(SO4)2O3(OH) · 3H2O
Reference: Minerals of Colorado (1997) Eckel, E. B.; U.S. Geological Survey Professional Paper 371

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcocite'2.BA.05Cu2S
'Chalcopyrite'2.CB.10aCuFeS2
'Enargite'2.KA.05Cu3AsS4
'Galena'2.CD.10PbS
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Tennantite2.GB.05Cu6[Cu4(Fe,Zn)2]As4S13
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Uraninite4.DL.05UO2
var: Pitchblende4.DL.05UO2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Zippeite7.EC.05K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 8 - Phosphates, Arsenates and Vanadates
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Group 9 - Silicates
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 3 - SULFOSALTS
ø = 4
Enargite3.2.1.1Cu3AsS4
3 <ø < 4
Tennantite3.3.6.2Cu6[Cu4(Fe,Zn)2]As4S13
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 31 - HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
Miscellaneous
Zippeite31.10.4.1K3(UO2)4(SO4)2O3(OH) · 3H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Rocks, etc.
Muscovite
var: Sericite
-KAl2(AlSi3O10)(OH)2
Uraninite
var: Pitchblende
-UO2

List of minerals for each chemical element

HHydrogen
H MuscoviteKAl2(AlSi3O10)(OH)2
H Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
OOxygen
O MuscoviteKAl2(AlSi3O10)(OH)2
O Uraninite (var: Pitchblende)UO2
O QuartzSiO2
O Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O UraniniteUO2
O ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
AlAluminium
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
SiSilicon
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
PPhosphorus
P TorberniteCu(UO2)2(PO4)2 · 12H2O
SSulfur
S ChalcociteCu2S
S ChalcopyriteCuFeS2
S EnargiteCu3AsS4
S GalenaPbS
S PyriteFeS2
S SphaleriteZnS
S TennantiteCu6[Cu4(Fe,Zn)2]As4S13
S ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K Muscovite (var: Sericite)KAl2(AlSi3O10)(OH)2
K ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O
FeIron
Fe ChalcopyriteCuFeS2
Fe PyriteFeS2
CuCopper
Cu ChalcociteCu2S
Cu ChalcopyriteCuFeS2
Cu EnargiteCu3AsS4
Cu TennantiteCu6[Cu4(Fe,Zn)2]As4S13
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
ZnZinc
Zn SphaleriteZnS
AsArsenic
As EnargiteCu3AsS4
As TennantiteCu6[Cu4(Fe,Zn)2]As4S13
PbLead
Pb GalenaPbS
UUranium
U Uraninite (var: Pitchblende)UO2
U TorberniteCu(UO2)2(PO4)2 · 12H2O
U UraniniteUO2
U ZippeiteK3(UO2)4(SO4)2O3(OH) · 3H2O

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleoproterozoic
1600 - 2500 Ma



ID: 2206683
Quartz-feldspar gneiss

Age: Proterozoic (1600 - 2500 Ma)

Description: Gray, dark-gray, white, pinkish-gray, and tan, moderately foliated to well-foliated, layered, fine- to coarse-grained (mostly medium grained) quartz-plagioclase-microcline-biotite gneiss. Proportion of minerals varies widely. Layers typically 10 cm to several tens of meters thick and commonly wavy. Locally contains layers of foliated monzogranite and granodiorite. May contain minor, thin layers of hornblende gneiss and amphibolite. Commonly migmatitic. U-Pb date on weakly foliated rock of monzogranitic composition in northwestern part of Indian Hills 7.5-minute quadrangle is 1,776±4 Ma. Weathers tan to pinkish tan in rounded outcrops. Crops out widely throughout map area

Reference: Kellogg, K.S., Shroba, R.R., Bryant, Bruce, and Premo, W.R. Geologic Map of the Denver West 30' x 60' Quadrangle, North- Central Colorado. USGS Geologic Investigations Series 3000. [35]

Paleoproterozoic
1600 - 2500 Ma



ID: 2855553
Felsic and hornblendic gneisses, either separate or interlayered

Age: Proterozoic (1600 - 2500 Ma)

Description: Includes metabasalt, metatuff, and interbedded metagraywacke; locally contains interlayered biotite gneiss. Derived principally from volcanic rocks

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{gneiss}, Minor:{metabasalt,metagraywacke}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Paleoproterozoic
1600 - 2500 Ma



ID: 3186950
Paleoproterozoic crystalline metamorphic rocks

Age: Proterozoic (1600 - 2500 Ma)

Lithology: Orthogneiss/paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Sims, P.K. and others (1963) Geology of Uranium and Associated Ore Deposits Central Part of the Front Range Mineral Belt Colorado. U.S. Geological Survey Professional Paper 371, prepared on behalf of the U.S. Atomic Energy Commission.
Eckel, Edwin B. (1997), Minerals of Colorado, updated & revised.


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