Bullion Mine Pennington County
Keystone, South Dakota
43.8982°N 103.4194°W
Mine Overview
The Bullion Mine Pennington County is in Keystone, South Dakota. Historically the site has been associated with the Keystone Mining District which is now part of the Black Hills National Forest. The site was first discovered in 1877. The Bullion Mine Pennington County was closed at the time of data entry with no known plans to re-open. Production size when active was considered to be small. Mine operations consist of surface and underground workings. There is one known shaft. The ore mined is composed of gold, chalcopyrite and pyrrhotite with waste material consisting primarily of cummingtonite, graphite and quartz. The ore body has a lenticular or lens shaped form 9 meters (29 feet) in width. Associated rock in this area is diorite from the Neoproterozoic era 1.00 to 0.54 billion years ago. The Black Hills of the Interior Plains characterize the geomorphology of the surrounding area.
Commodities
Additional textual information about a site or mine.
- Commodity Type Importance
- Gold Metallic Primary
- Silver Metallic Primary
- Arsenic Metallic Secondary
Deposit
THREE SHOOTS RANGING IN WIDTH FROM 10 TO 30 FEET. A SMALLER VEIN LIES EAST OF THE MAIN VEIN, 8 TO 10 FEET WIDE.
Location Info
- Pennington , South Dakota County / State
- Continent Country State County
- North America The United States South Dakota Pennington
Workings
Workings at the site.
Workings #1
- Type: Surface and Underground
- Surface Length: 60.96 Meters
Workings
DEVELOPMENT IS BY CROSSCUTS FROM THE SURFACE AND BY DRIFTS AND CROSSCUTS FROM A SHAFT AT THE NEARBY COLUMBIA MINE. A SMALLER VEIN LYING TO THE EAST OF THE MAIN VEIN IS 8 TO 10 FEET WIDE AND HAS BEEN DEVELOPED THROUGH A LENGTH OF 100 FEET.
Materials
Minerals or other materials present in the mine.
Orebody
Characteristics of the ore body.
- Width: 9.14 meters (29.99 feet)
Rocks
Geological materials at the site.
Physiography
Physiographic area where the resource is found.
- Division Province? Section
- Interior Plains Great Plains Province Black Hills
Alteration
Mineralogical and chemical alteration at or near the site, which may help to indicate the geographic extent of the geological processes producing the mine.
- Type? Alterations
- Local Surface Ore Is Oxidized
Ore Control
Controls on emplacement of ore such as faults or other structural features.
- Text?
- Shear Zone Along Diorite Dike
Reserve-resource
CONTAINING $12. 75 A TON IN GOLD
Nearby Deposits
Other deposits in the same region.
-
Holy Terror Mine
- Gold commodity Site type Mine status
- Pennington, South Dakota
- Underground
- 0.09 miles
-
Columbia Silver Mine
- Gold commodity Site type Mine status
- Pennington, South Dakota
- 0.09 miles
-
Holy Terror Mine
- Gold commodity Site type Mine status
- Pennington, South Dakota
- Vein
- 0.10 miles
-
Lucky Boy Lode
- Gold commodity Site type Mine status
- Pennington, South Dakota
- Underground
- 0.13 miles
-
Gold Hill Lode
- Gold commodity Site type Prospect status
- Pennington, South Dakota
- Underground
- 0.17 miles
-
Lucky Boy Mine
- Gold commodity Site type Mine status
- Pennington, South Dakota
- Vein
- 0.18 miles
-
Henry Tin Occurrence
- Beryllium commodity Site type Occurrence status
- Pennington, South Dakota
- 0.19 miles
-
Columbia Gold Mine
- Gold commodity Site type Mine status
- Pennington, South Dakota
- Underground
- 0.20 miles
-
Grand Island Group
- Gold commodity Site type Prospect status
- Pennington, South Dakota
- Underground
- 0.29 miles
-
Keystone District
- Beryllium commodity District type Mine status
- Pennington, South Dakota
- 0.33 miles
Nearby Places
- Keystone (0.19 miles away)
- Rockerville (5.12 miles away)
- Hill City (8.10 miles away)
- Colonial Pine Hills (9.16 miles away)
- Hermosa (12.07 miles away)
- Custer (12.75 miles away)
- Johnson Siding (12.91 miles away)
- Silver City (14.72 miles away)
- Rapid City (15.69 miles away)
- Rapid Valley (17.69 miles away)
- Fairburn (17.95 miles away)
- Green Valley (18.02 miles away)
- Blackhawk (18.32 miles away)
- Summerset (20.50 miles away)
- Nemo (20.87 miles away)
- Pringle (21.82 miles away)
- Piedmont (23.08 miles away)
Nearby Mining Districts
- Keystone Mining District (0 miles away)
- Hill City Mining District (2.98 miles away)
- Spokane Mining District (3.02 miles away)
- Spring Creek Area (4.62 miles away)
Nearby Lands
- Black Hills National Forest (0 miles away)
- Mount Rushmore National Memorial (0.76 miles away)
- Black Elk Wilderness (2.35 miles away)
Footnotes
* Mine bounds on map indicate the general area that a mine occupies. For an detailed map, refer to the overseeing BLM field office.
** The mine central point is based on an average of the mine's bounding box(es) and does not necessarily fall on the claim itself.
1 World-class significance is determined by total endowment of the contained commodity. This includes all past production and remaining reserves. Each commodity is considered separately and commodities cannot be combined to arrive at a significant size. The tonnage thresholds are from the mine model grade-tonnage studies. As of June 2008, many entries were classified as significant under less strict rules.
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Notes
ORE FROM LOWER LEVELS WAS HIGHER GRADE BUT IS DIFFICULT TO TREAT BECAUSE OF THE SULFIDES.