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Longfellow Mine, San Juan County, Colorado, USA i
Regional Level Types
Longfellow Mine Mine
San Juan County County
Colorado State
USA Country

Longfellow Mine, Red Mountain Mining District, Colorado, USA

Regional Level Types
Longfellow Mine	Mine
San Juan County	County
Colorado	State
USA	Country

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Longfellow Shaft

Longfellow Mine, San Juan County, Colorado, USA

View of headframe and buildings

Longfellow Mine, San Juan County, Colorado, USA

Enargite

Longfellow Mine, San Juan County, Colorado, USA

Longfellow Shaft

Longfellow Mine, San Juan County, Colorado, USA

View of headframe and buildings

Longfellow Mine, San Juan County, Colorado, USA

Enargite

Longfellow Mine, San Juan County, Colorado, USA

Longfellow Shaft

Longfellow Mine, San Juan County, Colorado, USA

View of headframe and buildings

Longfellow Mine, San Juan County, Colorado, USA

Latitude & Longitude (WGS84):

37° 53' 48'' North , 107° 42' 39'' West

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Dfc : Subarctic climate

Nearest Settlements:

Place	Population	Distance
Telluride	2,399 (2018)	10.0km
Silverton	637 (2011)	10.3km
Ophir	169 (2017)	11.5km
Mountain Village	1,395 (2017)	13.3km
Ouray	1,008 (2017)	14.4km

Mindat Locality ID:

14922

Long-form identifier:

mindat:1:2:14922:3

GUID (UUID V4):

The Longfellow mine is just east of and near the crest of Red Mountain Pass (Ouray-San Juan County line) on U.S. Highway 550. The deposit penetrated by this mine is fairly typical of chimney ore deposits of the Red Mountain mining district in the western San Juan Mountains of southwestern Colorado. Mine development started in the late 1940's or early 1950's and has continued intermittently to the present; the mine workings explore what are considered to be north and south ore bodies by means of a shaft and several short tunnels on the 150-foot level. In a shallow pit about 150 feet south of the shafthouse, a bulldozer cut has exposed mineralized ground which may, in part, be the near-surface expression of the south ore body.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

20 valid minerals.

Detailed Mineral List:

ⓘ Aurichalcite ?

Formula: (Zn,Cu)₅(CO₃)₂(OH)₆

References:

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

ⓘ Baryte

Formula: BaSO₄

References:

Collected by Bill Dameron 2011

location definitely places origin as Longfellow mine

USGS Prof. Paper 750C

ⓘ Calcite

Formula: CaCO₃

References:

Lavinsky, Rob (n.d.) Specimens previously handled by The Arkenstone.

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

USGS Prof. Paper 750C

ⓘ 'Chlorite Group'

References:

USGS Prof. Paper 750C

Rosemeyer, Tom, Smith, Arthur E. (1986) Great Pockets: The National Belle Mine [Colorado]. The Mineralogical Record, 17 (4) 229-236

ⓘ Dickite

Formula: Al₂(Si₂O₅)(OH)₄

Description: Luedke and Hosterman (1971) say: The dickite is white or light grey, massive appearing, and moderately soft. It occurs principally as small pore and cavity fillings and locally encrusting about ore minerals. As seen in thin section, the dickite occurs as single and clustered irregular pseudohexagonal crystals with low birefringence.

References:

USGS Prof. Paper 750C

Rosemeyer, Tom, Smith, Arthur E. (1986) Great Pockets: The National Belle Mine [Colorado]. The Mineralogical Record, 17 (4) 229-236

ⓘ Enargite

Formula: Cu₃AsS₄

References:

USGS Prof. Paper 750C

2008 New Mexico Mineral Symposium abstracts

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

ⓘ Fluorapatite

Formula: Ca₅(PO₄)₃F

References:

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

ⓘ Fluorite

Formula: CaF₂

References:

USGS Prof. Paper 750C

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

ⓘ Galena

Formula: PbS

References:

USGS Prof. Paper 750C

ⓘ 'Illite-1Md'

Formula: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

References:

USGS Prof. Paper 750C

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

ⓘ 'Illite-2M'

Formula: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

References:

USGS Prof. Paper 750C

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

ⓘ Kaolinite

Formula: Al₂(Si₂O₅)(OH)₄

References:

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

ⓘ Montmorillonite

Formula: (Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O

References:

USGS Prof. Paper 750C

Rosemeyer, Tom, Smith, Arthur E. (1986) Great Pockets: The National Belle Mine [Colorado]. The Mineralogical Record, 17 (4) 229-236

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

USGS Prof. Paper 750C

Rosemeyer, Tom, Smith, Arthur E. (1986) Great Pockets: The National Belle Mine [Colorado]. The Mineralogical Record, 17 (4) 229-236

ⓘ Muscovite var. Illite

Formula: K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

References:

USGS Prof. Paper 750C

Rosemeyer, Tom, Smith, Arthur E. (1986) Great Pockets: The National Belle Mine [Colorado]. The Mineralogical Record, 17 (4) 229-236

ⓘ Muscovite var. Sericite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

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

ⓘ Pyrite

Formula: FeS₂

References:

USGS Prof. Paper 750C

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

ⓘ Pyrophyllite

Formula: Al₂Si₄O₁₀(OH)₂

References:

USGS Prof. Paper 750C

Rosemeyer, Tom, Smith, Arthur E. (1986) Great Pockets: The National Belle Mine [Colorado]. The Mineralogical Record, 17 (4) 229-236

ⓘ Quartz

Formula: SiO₂

References:

USGS Prof. Paper 750C

2008 New Mexico Mineral Symposium abstracts

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

ⓘ Rectorite

Formula: (Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O

References:

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

ⓘ Scorodite

Formula: Fe³⁺AsO₄ · 2H₂O

References:

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

ⓘ Sphalerite

Formula: ZnS

References:

USGS Prof. Paper 750C

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

ⓘ 'Tennantite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)As₄S₁₂S

References:

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

ⓘ 'Tetrahedrite Subgroup'

Formula: Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S

References:

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

ⓘ Wurtzite

Formula: (Zn,Fe)S

References:

Rocks & Min.: 64:502.

ⓘ Zunyite

Formula: Al₁₃Si₅O₂₀(OH,F)₁₈Cl

References:

USGS Prof. Paper 750C

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Wurtzite	2.CB.45	(Zn,Fe)S
ⓘ	Galena	2.CD.10	PbS
ⓘ	Pyrite	2.EB.05a	FeS₂
ⓘ	'Tennantite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)As₄S₁₂S
ⓘ	'Tetrahedrite Subgroup'	2.GB.05	Cu₆(Cu₄C²⁺₂)Sb₄S₁₂S
ⓘ	Enargite	2.KA.05	Cu₃AsS₄
Group 3 - Halides
ⓘ	Fluorite	3.AB.25	CaF₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Aurichalcite ?	5.BA.15	(Zn,Cu)₅(CO₃)₂(OH)₆
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Baryte	7.AD.35	BaSO₄
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Fluorapatite	8.BN.05	Ca₅(PO₄)₃F
ⓘ	Scorodite	8.CD.10	Fe³⁺AsO₄ · 2H₂O
Group 9 - Silicates
ⓘ	Zunyite	9.BJ.55	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
ⓘ	Pyrophyllite	9.EC.10	Al₂Si₄O₁₀(OH)₂
ⓘ	Muscovite var. Illite	9.EC.15	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ		9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Sericite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Montmorillonite	9.EC.40	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
ⓘ	Rectorite	9.EC.60	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
ⓘ	Dickite	9.ED.05	Al₂(Si₂O₅)(OH)₄
ⓘ	Kaolinite	9.ED.05	Al₂(Si₂O₅)(OH)₄
Unclassified
ⓘ	'Chlorite Group'	-
ⓘ	'Illite-1Md'	-	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
ⓘ	'Illite-2M'	-	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
H	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
H	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
H	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
H	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
H	ⓘ Scorodite	Fe³⁺AsO₄ · 2H₂O
H	ⓘ Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
H	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Illite-1Md	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
H	ⓘ Illite-2M	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
C	Carbon
C	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
O	ⓘ Baryte	BaSO₄
O	ⓘ Calcite	CaCO₃
O	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Fluorapatite	Ca₅(PO₄)₃F
O	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
O	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
O	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
O	ⓘ Scorodite	Fe³⁺AsO₄ · 2H₂O
O	ⓘ Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
O	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Illite-1Md	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
O	ⓘ Illite-2M	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
F	Fluorine
F	ⓘ Fluorapatite	Ca₅(PO₄)₃F
F	ⓘ Fluorite	CaF₂
F	ⓘ Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
Na	Sodium
Na	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Na	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Mg	Magnesium
Mg	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Al	Aluminium
Al	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Al	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Al	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
Al	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Al	ⓘ Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
Al	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Illite-1Md	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Al	ⓘ Illite-2M	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	Silicon
Si	ⓘ Dickite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Si	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Si	ⓘ Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
Si	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Illite-1Md	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Si	ⓘ Illite-2M	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
P	Phosphorus
P	ⓘ Fluorapatite	Ca₅(PO₄)₃F
S	Sulfur
S	ⓘ Baryte	BaSO₄
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Enargite	Cu₃AsS₄
S	ⓘ Galena	PbS
S	ⓘ Pyrite	FeS₂
S	ⓘ Sphalerite	ZnS
S	ⓘ Tennantite Subgroup	Cu₆(Cu₄C₂²⁺)As₄S₁₂S
S	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
S	ⓘ Wurtzite	(Zn,Fe)S
Cl	Chlorine
Cl	ⓘ Zunyite	Al₁₃Si₅O₂₀(OH,F)₁₈Cl
K	Potassium
K	ⓘ Muscovite var. Illite	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Illite-1Md	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
K	ⓘ Illite-2M	K_0.65Al_2.0[Al_0.65Si_3.35O₁₀](OH)₂
Ca	Calcium
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Fluorapatite	Ca₅(PO₄)₃F
Ca	ⓘ Fluorite	CaF₂
Ca	ⓘ Montmorillonite	(Na,Ca)_0.33(Al,Mg)₂(Si₄O₁₀)(OH)₂ · nH₂O
Ca	ⓘ Rectorite	(Na,Ca)Al₄((Si,Al)₈O₂₀)(OH)₄ · 2H₂O
Fe	Iron
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Scorodite	Fe³⁺AsO₄ · 2H₂O
Fe	ⓘ Wurtzite	(Zn,Fe)S
Cu	Copper
Cu	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
Cu	ⓘ Chalcopyrite	CuFeS₂
Cu	ⓘ Enargite	Cu₃AsS₄
Cu	ⓘ Tennantite Subgroup	Cu₆(Cu₄C₂²⁺)As₄S₁₂S
Cu	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Zn	Zinc
Zn	ⓘ Aurichalcite	(Zn,Cu)₅(CO₃)₂(OH)₆
Zn	ⓘ Sphalerite	ZnS
Zn	ⓘ Wurtzite	(Zn,Fe)S
As	Arsenic
As	ⓘ Enargite	Cu₃AsS₄
As	ⓘ Scorodite	Fe³⁺AsO₄ · 2H₂O
As	ⓘ Tennantite Subgroup	Cu₆(Cu₄C₂²⁺)As₄S₁₂S
Sb	Antimony
Sb	ⓘ Tetrahedrite Subgroup	Cu₆(Cu₄C₂²⁺)Sb₄S₁₂S
Ba	Barium
Ba	ⓘ Baryte	BaSO₄
Pb	Lead
Pb	ⓘ Galena	PbS

Other Regions, Features and Areas containing this locality

North AmericaContinent

Rocky MountainsMountain Range

North America PlateTectonic Plate

Great Plains DomainDomain
Southern Rocky MountainsOrogenic Belt

USA

Colorado
- Red Mountain Mining DistrictMining District
San Juan MountainsMountain Range

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Rocks & Min.: 64:502.

https://www.mindat.org/mesg-647453.html

[1]Luedke R.G. and Hosterman J.W. (1971): Clay Minerals, Longfellow Mine, San Juan County, Colo.; U.S.G.S. Professional Paper 750-C; pp. 104-111

New Mexico Mineral Symposium abstracts (2008).

Quick NavTop Mineral List Other Regions References

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Longfellow Mine, San Juan County, Colorado, USAiRegional Level TypesLongfellow MineMine San Juan CountyCounty ColoradoState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); } Longfellow Mine, Red Mountain Mining District, Colorado, USA

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List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

References

Longfellow Mine, San Juan County, Colorado, USA i
Regional Level Types
Longfellow Mine Mine
San Juan County County
Colorado State
USA Country

Longfellow Mine, Red Mountain Mining District, Colorado, USA