REF:Deposit:: U.S. BUREAU OF MINES, 1954, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 1, BUREAU OF MINES INFORMATION CIRCULAR 7688
Deposit:: USBM STAFF,1955,REG.V,I.C.7707.PP.118-119
Deposit:: PAGE,L.R.ET AL.,1953,USGS PROF.PAPER 247.PP.102-104
Deposit:: FISHER, D.J., 1945, PRELIMINARY REPORT ON THE MINERALOGY OF SOME PEGMATITES NEAR CUSTER, SOUTH DAKOTA GEOLOGICAL
Commodities (Major) - Feldspar, Mica, Beryllium; (Trace) - Lithium
Development Status: Past Producer
Host Rock Unit: Pegmatite
Host Rock: Sandstone, Graywacke

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

ⓘ Beryllium

ⓘ Feldspar

ⓘ Mica

Mineral List

10 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ 'Greywacke'

ⓘ Sandstone

Detailed Mineral List:

ⓘ Albite

Formula: Na(AlSi₃O₈)

References:

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

ⓘ Albite var. Cleavelandite

Formula: Na(AlSi₃O₈)

References:

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

ⓘ Beryl

Formula: Be₃Al₂(Si₆O₁₈)

References:

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

ⓘ Lithiophilite

Formula: LiMn²⁺PO₄

References:

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

ⓘ Löllingite

Formula: FeAs₂

References:

Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology

ⓘ Microcline

Formula: K(AlSi₃O₈)

References:

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

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

References:

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

ⓘ Purpurite

Formula: Mn³⁺(PO₄)

References:

Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology

ⓘ Quartz

Formula: SiO₂

References:

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

ⓘ Schorl

Formula: NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

References:

Roberts, Willard Lincoln, Rapp, George Jr. (1965) Mineralogy of the Black Hills. Bulletin 18. South Dakota School of Mines and Technology

ⓘ 'Tourmaline'

Formula: AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z

References:

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

ⓘ Triphylite

Formula: LiFe²⁺PO₄

References:

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

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Löllingite	2.EB.15a	FeAs₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂
Group 8 - Phosphates, Arsenates and Vanadates
ⓘ	Lithiophilite	8.AB.10	LiMn²⁺PO₄
ⓘ	Purpurite	8.AB.10	Mn³⁺(PO₄)
ⓘ	Triphylite	8.AB.10	LiFe²⁺PO₄
Group 9 - Silicates
ⓘ	Beryl	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Schorl	9.CK.05	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	Microcline	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Cleavelandite	9.FA.35	Na(AlSi₃O₈)
Unclassified
ⓘ	'Tourmaline'	-	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Li	Lithium
Li	ⓘ Lithiophilite	LiMn²⁺PO₄
Li	ⓘ Triphylite	LiFe²⁺PO₄
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
B	Boron
B	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
B	ⓘ Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
O	Oxygen
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Lithiophilite	LiMn²⁺PO₄
O	ⓘ Microcline	K(AlSi₃O₈)
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Purpurite	Mn³⁺(PO₄)
O	ⓘ Quartz	SiO₂
O	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
O	ⓘ Tourmaline	AD₃G₆ (T₆O₁₈)(BO₃)₃X₃Z
O	ⓘ Triphylite	LiFe²⁺PO₄
O	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Na	Sodium
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Na	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Al	Aluminium
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Microcline	K(AlSi₃O₈)
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Al	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
Si	Silicon
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Microcline	K(AlSi₃O₈)
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Si	ⓘ Albite var. Cleavelandite	Na(AlSi₃O₈)
P	Phosphorus
P	ⓘ Lithiophilite	LiMn²⁺PO₄
P	ⓘ Purpurite	Mn³⁺(PO₄)
P	ⓘ Triphylite	LiFe²⁺PO₄
K	Potassium
K	ⓘ Microcline	K(AlSi₃O₈)
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Mn	Manganese
Mn	ⓘ Lithiophilite	LiMn²⁺PO₄
Mn	ⓘ Purpurite	Mn³⁺(PO₄)
Fe	Iron
Fe	ⓘ Löllingite	FeAs₂
Fe	ⓘ Schorl	NaFe₃²⁺Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)
Fe	ⓘ Triphylite	LiFe²⁺PO₄
As	Arsenic
As	ⓘ Löllingite	FeAs₂

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

Wyoming DomainDomain

USA

Black HillsMountain Range

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Earl Lode, Custer Mining District, Custer County, South Dakota, USAiRegional Level TypesEarl LodeLode Custer Mining DistrictMining District Custer CountyCounty South DakotaState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

Select Mineral List Type

Commodity List

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Other Regions, Features and Areas containing this locality

Earl Lode, Custer Mining District, Custer County, South Dakota, USA i
Regional Level Types
Earl Lode Lode
Custer Mining District Mining District
Custer County County
South Dakota State
USA Country