Helen Beryl Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USAi
| Regional Level Types | |
|---|---|
| Helen Beryl Mine | Mine |
| Fourmile | Unincorporated Community |
| Custer Mining District | Mining District |
| Custer County | County |
| South Dakota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
43° 42' 46'' North , 103° 41' 48'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Custer | 1,952 (2017) | 9.9km |
| Pringle | 109 (2017) | 14.2km |
| Hill City | 995 (2017) | 26.3km |
| Keystone | 343 (2017) | 30.2km |
| Hot Springs | 3,532 (2017) | 36.0km |
Other/historical names associated with this locality:
Sweepstakes Beryl; Big Tom claim; Kem claim
A beryl mine located in sec. 7, T.4S., R.4E., at Fourmile, SW of Custer. Operated chiefly in the 1940s (WWII).
Mineralization is an irregular, oval, zoned pegmatite body in quartz-mica schist. Rare-element pegmatite.
Workings include a large open cut.
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Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
22 valid minerals. 2 erroneous literature entries.
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 DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | 'Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series' | 4.. | |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Opal var. Opal-AN | 4.DA.10 | SiO2 · nH2O |
| ⓘ | 4.DA.10 | SiO2 · nH2O | |
| ⓘ | Cassiterite | 4.DB.05 | SnO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Triphylite var. Ferrisicklerite | 8.AB.10 | Li1-x(Fe3+xFe2+1-x)PO4 |
| ⓘ | Heterosite | 8.AB.10 | (Fe3+,Mn3+)PO4 |
| ⓘ | Purpurite ? | 8.AB.10 | Mn3+(PO4) |
| ⓘ | Lithiophilite var. Sicklerite ? | 8.AB.10 | Li1-x(Mn3+xMn2+1-x)PO4 |
| ⓘ | Triphylite | 8.AB.10 | LiFe2+PO4 |
| ⓘ | Alluaudite | 8.AC.10 | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| ⓘ | Amblygonite | 8.BB.05 | LiAl(PO4)F |
| ⓘ | Fluorapatite | 8.BN.05 | Ca5(PO4)3F |
| ⓘ | Vivianite | 8.CE.40 | Fe2+Fe2+2(PO4)2 · 8H2O |
| ⓘ | Childrenite | 8.DD.20 | Fe2+Al(PO4)(OH)2 · H2O |
| Group 9 - Silicates | |||
| ⓘ | Eucryptite ? | 9.AA.05 | LiAlSiO4 |
| ⓘ | Sillimanite | 9.AF.05 | Al2(SiO4)O |
| ⓘ | Bertrandite | 9.BD.05 | Be4(Si2O7)(OH)2 |
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Beryl | 9.CJ.05 | Be3Al2(Si6O18) |
| ⓘ | Schorl | 9.CK.05 | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) |
| ⓘ | Spodumene | 9.DA.30 | LiAlSi2O6 |
| ⓘ | var. Hiddenite | 9.DA.30 | LiAlSi2O6 |
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 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 |
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Tantalite' | - | (Mn,Fe)(Ta,Nb)2O6 |
| ⓘ | 'Hornblende Root Name Group' | - | ◻Ca2(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2 |
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
| ⓘ | 'Columbite-Tantalite' | - | |
| ⓘ | 'Manganese Oxides' | - | |
| ⓘ | 'Triphylite Group' | - | VIM1VIM2TO4 |
| ⓘ | 'Jahnsite Group' | - | XM1M22M32(H2O)8(OH)2(PO4)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Bertrandite | Be4(Si2O7)(OH)2 |
| H | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| H | ⓘ Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Opal var. Opal-AN | SiO2 · nH2O |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Opal | SiO2 · nH2O |
| H | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| H | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| H | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Jahnsite Group | XM1M22M32(H2O)8(OH)2(PO4)4 |
| Li | Lithium | |
| Li | ⓘ Amblygonite | LiAl(PO4)F |
| Li | ⓘ Eucryptite | LiAlSiO4 |
| Li | ⓘ Triphylite var. Ferrisicklerite | Li1-x(Fex3+Fe2+1-x)PO4 |
| Li | ⓘ Lithiophilite var. Sicklerite | Li1-x(Mnx3+Mn2+1-x)PO4 |
| Li | ⓘ Spodumene | LiAlSi2O6 |
| Li | ⓘ Triphylite | LiFe2+PO4 |
| Li | ⓘ Spodumene var. Hiddenite | LiAlSi2O6 |
| Be | Beryllium | |
| Be | ⓘ Bertrandite | Be4(Si2O7)(OH)2 |
| Be | ⓘ Beryl | Be3Al2(Si6O18) |
| B | Boron | |
| B | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| C | Carbon | |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| O | ⓘ Amblygonite | LiAl(PO4)F |
| O | ⓘ Bertrandite | Be4(Si2O7)(OH)2 |
| O | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | ⓘ Beryl | Be3Al2(Si6O18) |
| O | ⓘ Cassiterite | SnO2 |
| O | ⓘ Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Eucryptite | LiAlSiO4 |
| O | ⓘ Triphylite var. Ferrisicklerite | Li1-x(Fex3+Fe2+1-x)PO4 |
| O | ⓘ Fluorapatite | Ca5(PO4)3F |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Heterosite | (Fe3+,Mn3+)PO4 |
| O | ⓘ Opal var. Opal-AN | SiO2 · nH2O |
| O | ⓘ Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series | |
| O | ⓘ Microcline | K(AlSi3O8) |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Purpurite | Mn3+(PO4) |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| O | ⓘ Lithiophilite var. Sicklerite | Li1-x(Mnx3+Mn2+1-x)PO4 |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Sillimanite | Al2(SiO4)O |
| O | ⓘ Spodumene | LiAlSi2O6 |
| O | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| O | ⓘ Triphylite | LiFe2+PO4 |
| O | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| O | ⓘ Spodumene var. Hiddenite | LiAlSi2O6 |
| O | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| O | ⓘ Triphylite Group | VIM1VIM2TO4 |
| O | ⓘ Jahnsite Group | XM1M22M32(H2O)8(OH)2(PO4)4 |
| F | Fluorine | |
| F | ⓘ Amblygonite | LiAl(PO4)F |
| F | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| F | ⓘ Fluorapatite | Ca5(PO4)3F |
| F | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Na | Sodium | |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| Na | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Mg | Magnesium | |
| Mg | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| Mg | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | Aluminium | |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Amblygonite | LiAl(PO4)F |
| Al | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | ⓘ Beryl | Be3Al2(Si6O18) |
| Al | ⓘ Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Eucryptite | LiAlSiO4 |
| Al | ⓘ Microcline | K(AlSi3O8) |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Al | ⓘ Sillimanite | Al2(SiO4)O |
| Al | ⓘ Spodumene | LiAlSi2O6 |
| Al | ⓘ Spodumene var. Hiddenite | LiAlSi2O6 |
| Al | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Bertrandite | Be4(Si2O7)(OH)2 |
| Si | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | ⓘ Beryl | Be3Al2(Si6O18) |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Eucryptite | LiAlSiO4 |
| Si | ⓘ Opal var. Opal-AN | SiO2 · nH2O |
| Si | ⓘ Microcline | K(AlSi3O8) |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Si | ⓘ Sillimanite | Al2(SiO4)O |
| Si | ⓘ Spodumene | LiAlSi2O6 |
| Si | ⓘ Spodumene var. Hiddenite | LiAlSi2O6 |
| Si | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| P | Phosphorus | |
| P | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| P | ⓘ Amblygonite | LiAl(PO4)F |
| P | ⓘ Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| P | ⓘ Triphylite var. Ferrisicklerite | Li1-x(Fex3+Fe2+1-x)PO4 |
| P | ⓘ Fluorapatite | Ca5(PO4)3F |
| P | ⓘ Heterosite | (Fe3+,Mn3+)PO4 |
| P | ⓘ Purpurite | Mn3+(PO4) |
| P | ⓘ Lithiophilite var. Sicklerite | Li1-x(Mnx3+Mn2+1-x)PO4 |
| P | ⓘ Triphylite | LiFe2+PO4 |
| P | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| P | ⓘ Jahnsite Group | XM1M22M32(H2O)8(OH)2(PO4)4 |
| Cl | Chlorine | |
| Cl | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| 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 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Fluorapatite | Ca5(PO4)3F |
| Ca | ⓘ Hornblende Root Name Group | ◻Ca2(Z42+Z3+)(AlSi7O22)(OH,F,Cl)2 |
| Ti | Titanium | |
| Ti | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| V | Vanadium | |
| V | ⓘ Triphylite Group | VIM1VIM2TO4 |
| Mn | Manganese | |
| Mn | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| Mn | ⓘ Heterosite | (Fe3+,Mn3+)PO4 |
| Mn | ⓘ Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series | |
| Mn | ⓘ Purpurite | Mn3+(PO4) |
| Mn | ⓘ Lithiophilite var. Sicklerite | Li1-x(Mnx3+Mn2+1-x)PO4 |
| Mn | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| Fe | Iron | |
| Fe | ⓘ Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| Fe | ⓘ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | ⓘ Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Triphylite var. Ferrisicklerite | Li1-x(Fex3+Fe2+1-x)PO4 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Heterosite | (Fe3+,Mn3+)PO4 |
| Fe | ⓘ Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series | |
| Fe | ⓘ Schorl | NaFe32+Al6(Si6O18)(BO3)3(OH)3(OH) |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| Fe | ⓘ Triphylite | LiFe2+PO4 |
| Fe | ⓘ Vivianite | Fe2+Fe22+(PO4)2 · 8H2O |
| Nb | Niobium | |
| Nb | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
| Sn | Tin | |
| Sn | ⓘ Cassiterite | SnO2 |
| I | Iodine | |
| I | ⓘ Triphylite Group | VIM1VIM2TO4 |
| Ta | Tantalum | |
| Ta | ⓘ Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series | |
| Ta | ⓘ Tantalite | (Mn,Fe)(Ta,Nb)2O6 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Wyoming CratonCraton
- Wyoming DomainDomain
USA
- Black HillsMountain Range
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Helen Beryl Mine, Fourmile, Custer Mining District, Custer County, South Dakota, USA