Cressmans Gulch Mine (Cressmans Gulch pegmatite), Clear Creek pegmatite Province, Jefferson County, Colorado, USA i
Regional Level Types
Cressmans Gulch Mine (Cressmans Gulch pegmatite) Mine
Clear Creek pegmatite Province Province
Jefferson County County
Colorado State
USA Country

Regional Level Types
Cressmans Gulch Mine (Cressmans Gulch pegmatite)	Mine
Clear Creek pegmatite Province	Province
Jefferson County	County
Colorado	State
USA	Country

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Latitude & Longitude (WGS84):

39° 47' 26'' North , 105° 16' 1'' West

Latitude & Longitude (decimal):

G#: 9xj4keduy

Type:

Köppen climate type:

Dfb : Warm-summer humid continental climate

Nearest Settlements:

Place	Population	Distance
Golden	20,330 (2017)	5.5km
Applewood	7,160 (2011)	9.6km
West Pleasant View	3,840 (2011)	9.9km
Genesee	3,609 (2011)	11.7km
East Pleasant View	356 (2011)	11.7km

Nearest Clubs:
Local clubs are the best way to get access to collecting localities

Club	Location	Distance
Mile High Rock and Mineral Society	Arvada, Colorado	15km
Colorado Mineral Society	Lakewood, Colorado	19km
Denver Gem and Mineral Guild	Denver, Colorado	25km
Friends of Mineralogy - Colorado Chapter	Denver, Colorado	25km
Western Interior Paleontological Society	Denver, Colorado	25km

Mindat Locality ID:

6235

Long-form identifier:

mindat:1:2:6235:3

GUID (UUID V4):

8980a212-2f5e-46b1-9da0-1e2d4f75470c

A pegmatite mine prospect located in the SE¼ sec. 17, T. 3 S., R. 70 W., in Cressmans Gulch, the first gulch north of Golden Gate Canyon.

Mineralization is comprised of 4 partially zoned pegmatite exposures, 1,500 feet long and 10 to 40 feet wide.

Workings include 2 sidehill cuts.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'

8 valid minerals.

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ 'Apatite'

Formula: Ca₅(PO₄)₃(Cl/F/OH)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Azurite

Formula: Cu₃(CO₃)₂(OH)₂

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).

ⓘ 'Biotite'

Formula: K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ 'Columbite-(Fe)-Columbite-(Mn) Series'

References:

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).

ⓘ Malachite

Formula: Cu₂(CO₃)(OH)₂

References:

Eckel, Edwin Butt , Cobban, Robert R., Mosburg, Shirley K., Foord, Eugene E. (1997) Minerals of Colorado. Fulcrum Publishing.

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Quartz

Formula: SiO₂

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ 'Tantalite'

Formula: (Mn,Fe)(Ta,Nb)₂O₆

References:

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).

ⓘ Tantalite-(Mn)

Formula: Mn²⁺Ta₂O₆

References:

Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).

ⓘ 'Tourmaline'

Formula: AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z

References:

Hanley, J.B., Heinrich, E.W., Page, L.R. (1950) Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944. Professional Paper 227. US Geological Survey doi:10.3133/pp227

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Tantalite-(Mn)	4.DB.35	Mn²⁺Ta₂O₆
Group 5 - Nitrates and Carbonates
ⓘ	Azurite	5.BA.05	Cu₃(CO₃)₂(OH)₂
ⓘ	Malachite	5.BA.10	Cu₂(CO₃)(OH)₂
Group 9 - Silicates
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
Unclassified
ⓘ	'Biotite'	-	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
ⓘ	'Tantalite'	-	(Mn,Fe)(Ta,Nb)₂O₆
ⓘ	'Tourmaline'	-	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
ⓘ	'Columbite-(Fe)-Columbite-(Mn) Series'	-
ⓘ	'Apatite'	-	Ca₅(PO₄)₃(Cl/F/OH)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
H	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
H	ⓘ Malachite	Cu₂(CO₃)(OH)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
B	Boron
B	ⓘ Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
C	Carbon
C	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
C	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
O	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Tantalite-(Mn)	Mn²⁺Ta₂O₆
O	ⓘ Malachite	Cu₂(CO₃)(OH)₂
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
O	ⓘ Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
O	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
F	Fluorine
F	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
F	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Mg	Magnesium
Mg	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
P	Phosphorus
P	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Cl	Chlorine
Cl	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
K	Potassium
K	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Apatite	Ca₅(PO₄)₃(Cl/F/OH)
Ti	Titanium
Ti	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Mn	Manganese
Mn	ⓘ Tantalite-(Mn)	Mn²⁺Ta₂O₆
Mn	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
Fe	Iron
Fe	ⓘ Biotite	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Fe	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
Cu	Copper
Cu	ⓘ Azurite	Cu₃(CO₃)₂(OH)₂
Cu	ⓘ Malachite	Cu₂(CO₃)(OH)₂
Nb	Niobium
Nb	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆
Ta	Tantalum
Ta	ⓘ Tantalite-(Mn)	Mn²⁺Ta₂O₆
Ta	ⓘ Tantalite	(Mn,Fe)(Ta,Nb)₂O₆

Other Regions, Features and Areas containing this locality

North America

Rocky MountainsMountain Range

North America PlateTectonic Plate

Great Plains DomainDomain

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References

Ref.: Eckel, E. B. (1997), Minerals of Colorado, updated & revised: 19; Meeves, H., et al (1966), Reconnaissance of beryllium-bearing pegmatite deposits in six western states, US Bur. Mines Info. Circ. 8298: 27 (Table A-1).

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