Grand Junction and Hartford Group, Unorganized mining district [1], Custer County, South Dakota, USAi
Regional Level Types | |
---|---|
Grand Junction and Hartford Group | - not defined - |
Unorganized mining district [1] | Mining District |
Custer County | County |
South Dakota | State |
USA | Country |
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Latitude & Longitude (WGS84):
43° 50' 55'' North , 103° 40' 20'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Custer | 1,952 (2017) | 10.8km |
Hill City | 995 (2017) | 12.1km |
Keystone | 343 (2017) | 21.0km |
Pringle | 109 (2017) | 27.4km |
Johnson Siding | 659 (2017) | 32.2km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
Club | Location | Distance |
---|---|---|
Western Dakota Gem & Mineral Society | Rapid City, South Dakota | 44km |
Mindat Locality ID:
121268
Long-form identifier:
mindat:1:2:121268:9
GUID (UUID V4):
95be3215-cd11-4aaf-8ca4-31f69880e2a7
REF:Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.P.87
Deposit:: ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOG
Commodities (Major) - Silver, Gold
Deposit Type: Replacement
Development Status: Past Producer
Host Rock Unit: Diorite
Host Rock: Schist
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.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!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
β Arsenopyrite Formula: FeAsS |
β Galena Formula: PbS |
β Gold Formula: Au |
β Graphite Formula: C References: |
β Grunerite Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2 References: |
β Magnetite Formula: Fe2+Fe3+2O4 References: |
β Pyrrhotite Formula: Fe1-xS |
β Quartz Formula: SiO2 |
β Silver Formula: Ag |
β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Silver | 1.AA.05 | Ag |
β | Gold | 1.AA.05 | Au |
β | Graphite | 1.CB.05a | C |
Group 2 - Sulphides and Sulfosalts | |||
β | Sphalerite | 2.CB.05a | ZnS |
β | Pyrrhotite | 2.CC.10 | Fe1-xS |
β | Galena | 2.CD.10 | PbS |
β | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
β | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
β | Grunerite | 9.DE.05 | β»{Fe2+2}{Fe2+5}(Si8O22)(OH)2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
C | Carbon | |
C | β Graphite | C |
O | Oxygen | |
O | β Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
O | β Magnetite | Fe2+Fe23+O4 |
O | β Quartz | SiO2 |
Si | Silicon | |
Si | β Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
Si | β Quartz | SiO2 |
S | Sulfur | |
S | β Arsenopyrite | FeAsS |
S | β Galena | PbS |
S | β Pyrrhotite | Fe1-xS |
S | β Sphalerite | ZnS |
Fe | Iron | |
Fe | β Arsenopyrite | FeAsS |
Fe | β Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
Fe | β Magnetite | Fe2+Fe23+O4 |
Fe | β Pyrrhotite | Fe1-xS |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
As | Arsenic | |
As | β Arsenopyrite | FeAsS |
Ag | Silver | |
Ag | β Silver | Ag |
Au | Gold | |
Au | β Gold | Au |
Pb | Lead | |
Pb | β Galena | PbS |
Other Regions, Features and Areas containing this locality
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