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Elkhorn Mine (Tinsley Mine), Custer, Custer Mining District, Custer County, South Dakota, USAi
Regional Level Types
Elkhorn Mine (Tinsley Mine)Mine
CusterCity
Custer Mining DistrictMining District
Custer CountyCounty
South DakotaState
USACountry

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Latitude & Longitude (WGS84):
43° 44' 48'' North , 103° 31' 0'' West
Latitude & Longitude (decimal):
43.74690,-103.51667
GeoHash:
G#: 9xy2u7vkn
GRN:
N30W54
Type:
Mine
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Custer1,952 (2017)6.9km
Pringle109 (2017)16.6km
Keystone343 (2017)18.3km
Hill City995 (2017)21.2km
Hermosa392 (2017)28.1km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Western Dakota Gem & Mineral SocietyRapid City, South Dakota44km
Mindat Locality ID:
44835
Long-form identifier:
mindat:1:2:44835:5
GUID (UUID V4):
7e0ce151-d82e-4517-a5de-a20af50809d1


Granite pegmatite. 5 miles ESE of Custer

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


17 valid minerals.

Detailed Mineral List:

β“˜ Albite
Formula: Na(AlSi3O8)
β“˜ Albite var. Cleavelandite
Formula: Na(AlSi3O8)
β“˜ Alluaudite
Formula: (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
β“˜ Andalusite
Formula: Al2(SiO4)O
β“˜ Beryl
Formula: Be3Al2(Si6O18)
β“˜ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜ Cassiterite
Formula: SnO2
β“˜ Fluorapatite
Formula: Ca5(PO4)3F
β“˜ 'Garnet Group'
Formula: X3Z2(SiO4)3
β“˜ Heterosite
Formula: (Fe3+,Mn3+)PO4
β“˜ Hureaulite
Formula: Mn2+5(PO3OH)2(PO4)2 · 4H2O
β“˜ Kaolinite
Formula: Al2(Si2O5)(OH)4
β“˜ 'Limonite'
β“˜ Lithiophilite var. Sicklerite
Formula: Li1-x(Mn3+xMn2+1-x)PO4
β“˜ LΓΆllingite
Formula: FeAs2
β“˜ Microcline
Formula: K(AlSi3O8)
β“˜ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
β“˜ Quartz
Formula: SiO2
β“˜ Quartz var. Rose Quartz
Formula: SiO2
β“˜ Schorl
Formula: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜ Sillimanite
Formula: Al2(SiO4)O
β“˜ Svanbergite
Formula: SrAl3(PO4)(SO4)(OH)6
β“˜ Triphylite
Formula: LiFe2+PO4
Description: Mn/Mn + Fe = 0.28

Gallery:

Be3Al2(Si6O18)β“˜ Beryl

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
β“˜LΓΆllingite2.EB.15aFeAs2
Group 4 - Oxides and Hydroxides
β“˜Quartz
var. Rose Quartz		4.DA.05SiO2
β“˜4.DA.05SiO2
β“˜Cassiterite4.DB.05SnO2
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Lithiophilite
var. Sicklerite		8.AB.10Li1-x(Mn3+xMn2+1-x)PO4
β“˜Heterosite8.AB.10(Fe3+,Mn3+)PO4
β“˜Triphylite8.AB.10LiFe2+PO4
β“˜Alluaudite8.AC.10(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
β“˜Svanbergite8.BL.05SrAl3(PO4)(SO4)(OH)6
β“˜Fluorapatite8.BN.05Ca5(PO4)3F
β“˜Hureaulite8.CB.10Mn2+5(PO3OH)2(PO4)2 Β· 4H2O
Group 9 - Silicates
β“˜Sillimanite9.AF.05Al2(SiO4)O
β“˜Andalusite9.AF.10Al2(SiO4)O
β“˜Beryl9.CJ.05Be3Al2(Si6O18)
β“˜Schorl9.CK.05NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)
β“˜Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
β“˜Kaolinite9.ED.05Al2(Si2O5)(OH)4
β“˜Microcline9.FA.30K(AlSi3O8)
β“˜Albite
var. Cleavelandite		9.FA.35Na(AlSi3O8)
β“˜9.FA.35Na(AlSi3O8)
Unclassified
β“˜'Limonite'-
β“˜'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
β“˜'Garnet Group'-X3Z2(SiO4)3

List of minerals for each chemical element

HHydrogen
Hβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hβ“˜ HureauliteMn52+(PO3OH)2(PO4)2 · 4H2O
Hβ“˜ KaoliniteAl2(Si2O5)(OH)4
Hβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Hβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Hβ“˜ SvanbergiteSrAl3(PO4)(SO4)(OH)6
LiLithium
Liβ“˜ Lithiophilite var. SickleriteLi1-x(Mnx3+Mn2+1-x)PO4
Liβ“˜ TriphyliteLiFe2+PO4
BeBeryllium
Beβ“˜ BerylBe3Al2(Si6O18)
BBoron
Bβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
Oβ“˜ AlbiteNa(AlSi3O8)
Oβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Oβ“˜ AndalusiteAl2(SiO4)O
Oβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oβ“˜ BerylBe3Al2(Si6O18)
Oβ“˜ CassiteriteSnO2
Oβ“˜ FluorapatiteCa5(PO4)3F
Oβ“˜ Heterosite(Fe3+,Mn3+)PO4
Oβ“˜ HureauliteMn52+(PO3OH)2(PO4)2 · 4H2O
Oβ“˜ KaoliniteAl2(Si2O5)(OH)4
Oβ“˜ MicroclineK(AlSi3O8)
Oβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Oβ“˜ QuartzSiO2
Oβ“˜ Quartz var. Rose QuartzSiO2
Oβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Oβ“˜ Lithiophilite var. SickleriteLi1-x(Mnx3+Mn2+1-x)PO4
Oβ“˜ SillimaniteAl2(SiO4)O
Oβ“˜ SvanbergiteSrAl3(PO4)(SO4)(OH)6
Oβ“˜ TriphyliteLiFe2+PO4
Oβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Oβ“˜ Garnet GroupX3Z2(SiO4)3
FFluorine
Fβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fβ“˜ FluorapatiteCa5(PO4)3F
NaSodium
Naβ“˜ AlbiteNa(AlSi3O8)
Naβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Naβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Naβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
MgMagnesium
Mgβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Mgβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alβ“˜ AlbiteNa(AlSi3O8)
Alβ“˜ AndalusiteAl2(SiO4)O
Alβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alβ“˜ BerylBe3Al2(Si6O18)
Alβ“˜ KaoliniteAl2(Si2O5)(OH)4
Alβ“˜ MicroclineK(AlSi3O8)
Alβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Alβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Alβ“˜ SillimaniteAl2(SiO4)O
Alβ“˜ SvanbergiteSrAl3(PO4)(SO4)(OH)6
Alβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
SiSilicon
Siβ“˜ AlbiteNa(AlSi3O8)
Siβ“˜ AndalusiteAl2(SiO4)O
Siβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siβ“˜ BerylBe3Al2(Si6O18)
Siβ“˜ KaoliniteAl2(Si2O5)(OH)4
Siβ“˜ MicroclineK(AlSi3O8)
Siβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
Siβ“˜ QuartzSiO2
Siβ“˜ Quartz var. Rose QuartzSiO2
Siβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Siβ“˜ SillimaniteAl2(SiO4)O
Siβ“˜ Albite var. CleavelanditeNa(AlSi3O8)
Siβ“˜ Garnet GroupX3Z2(SiO4)3
PPhosphorus
Pβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Pβ“˜ FluorapatiteCa5(PO4)3F
Pβ“˜ Heterosite(Fe3+,Mn3+)PO4
Pβ“˜ HureauliteMn52+(PO3OH)2(PO4)2 · 4H2O
Pβ“˜ Lithiophilite var. SickleriteLi1-x(Mnx3+Mn2+1-x)PO4
Pβ“˜ SvanbergiteSrAl3(PO4)(SO4)(OH)6
Pβ“˜ TriphyliteLiFe2+PO4
SSulfur
Sβ“˜ SvanbergiteSrAl3(PO4)(SO4)(OH)6
KPotassium
Kβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kβ“˜ MicroclineK(AlSi3O8)
Kβ“˜ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Caβ“˜ FluorapatiteCa5(PO4)3F
TiTitanium
Tiβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
MnManganese
Mnβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Mnβ“˜ Heterosite(Fe3+,Mn3+)PO4
Mnβ“˜ HureauliteMn52+(PO3OH)2(PO4)2 · 4H2O
Mnβ“˜ Lithiophilite var. SickleriteLi1-x(Mnx3+Mn2+1-x)PO4
FeIron
Feβ“˜ Alluaudite(Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3
Feβ“˜ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feβ“˜ Heterosite(Fe3+,Mn3+)PO4
Feβ“˜ LΓΆllingiteFeAs2
Feβ“˜ SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3(OH)
Feβ“˜ TriphyliteLiFe2+PO4
AsArsenic
Asβ“˜ LΓΆllingiteFeAs2
SrStrontium
Srβ“˜ SvanbergiteSrAl3(PO4)(SO4)(OH)6
SnTin
Snβ“˜ CassiteriteSnO2

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate
USA

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

Staatz, M. H.; Page, L. R.; Norton, J. J.; Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C.
King, Vandall T. (2000) Mineralogy of Maine Vol. 2 - Mining History, Gems, and Geology. Maine Geological Survey.pp.333-336
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