Beryl Mica Lode
Pringle, South Dakota
43.6332°N 103.5566°W
Mine Overview
The Beryl Mica Lode is near Pringle, South Dakota. Historically the site has been associated with the Pringle Mining District which is now part of the Black Hills National Forest. The Beryl Mica Lode 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. Subsurface depth reaches a maximum of 12 meters (40 feet) and extends 61 meters (200 feet) in length. The ore mined is composed of mica, microcline and beryl with waste material consisting primarily of tourmaline and quartz. The ore is found in dikes 30 meters (100 feet) long, 15 meters (50 feet) wide, and 2 meters (8 feet) thick. The host rock in this area is quartzite. The Black Hills of the Interior Plains characterize the geomorphology of the surrounding area.
Owner Name and Address
Dakota Feldspar Company
Custer, South Dakota- Type
- Owner-Operator
Commodities
Additional textual information about a site or mine.
- Commodity Type Importance
- Feldspar Non-Metallic Primary
- Beryllium Metallic Secondary
- Mica Non-Metallic Secondary
Workings
Workings at the site.
Workings #1
- Type: Surface and Underground
- Surface Width: 5.18 Meters
- Sub Surface Length: 60.96 Meters
- Sub Surface Depth: 12.19 Meters
Workings
MOST MICA WAS MINED THROUGH A GLORY HOLE ABOVE A CROSSCUT. FELDSPAR WAS MINED THROUGH A LARGE OPEN CUT FOLLOWING THE DIKE.
Orebody
Characteristics of the ore body.
- Length:
- Width: 15.24 meters (50.00 feet)
- Thickness: 2.44 meters (8.01 feet)
Rocks
Geological materials at the site.
- Class? 1st Order Name? 2nd Order Name? 3rd Order Name? 4th Order Name? Most Specific Name? Begin Time End Time Description?
- Associated Rock Plutonic Rock Pegmatite - - Pegmatite Neoproterozoic Neoproterozoic -
- Host Rock Metamorphic Rock Metasedimentary Rock Quartzite - Quartzite - - -
- Mineralization - - - - - Neoproterozoic Neoproterozoic -
Physiography
Physiographic area where the resource is found.
- Division Province? Section
- Interior Plains Great Plains Province Black Hills
Nearby Deposits
Other deposits in the same region.
-
Dakota Feldspar Mine
- Beryllium commodity Site type Mine status
- Custer, South Dakota
- Surface And Underground
- 0.61 miles
-
Pink Monster Mine
- Feldspar commodity Site type Mine status
- Custer, South Dakota
- Surface And Underground
- 1.25 miles
-
Pink Monster Mine
- Feldspar commodity Site type Mine status
- Custer, South Dakota
- Surface And Underground
- 1.25 miles
-
Tanner Property
- Beryllium commodity Site type Mine status
- Custer, South Dakota
- Surface
- 1.31 miles
-
Smith Feldspar Mine
- Feldspar commodity Site type Mine status
- Custer, South Dakota
- 1.65 miles
-
Greene Feldspar Mine
- Beryllium commodity Site type Mine status
- Custer, South Dakota
- 1.70 miles
-
Phenacite Feldspar Prospect
- Feldspar commodity Site type Prospect status
- Custer, South Dakota
- Surface
- 1.75 miles
-
Henwood Lode
- Feldspar commodity Site type Mine status
- Custer, South Dakota
- Surface
- 1.75 miles
-
Henwood Lode
- Beryllium commodity Site type Mine status
- Custer, South Dakota
- 1.77 miles
-
Pringle Beryllium Mine
- Beryllium commodity Site type Mine status
- Custer, South Dakota
- Surface
- 1.81 miles
Nearby Places
- Pringle (2.52 miles away)
- Custer (9.45 miles away)
- Hot Springs (14.52 miles away)
- Buffalo Gap (15.64 miles away)
- Fairburn (17.63 miles away)
- Keystone (19.39 miles away)
- Hill City (20.69 miles away)
Nearby Mining Districts
- Pringle Mining District (0 miles away)
- Custer Mining District (1.54 miles away)
Nearby Lands
- Black Hills National Forest (0 miles away)
- Wind Cave National Park (2.79 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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Deposit
THESE ARE NORTH WALL ZONE MEASUREMENTS. FELDSPAR IS FROM A 10 FEET THICK MASS THAT FORMED THE SOUTH WALL OF THE OLD MICA ZONE. 2 UNPATENTED CLAIMS.