Beryl Mica Lode
Pringle, South Dakota
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.
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MOST MICA WAS MINED THROUGH A GLORY HOLE ABOVE A CROSSCUT. FELDSPAR WAS MINED THROUGH A LARGE OPEN CUT FOLLOWING THE DIKE.
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Other deposits in the same region.
Dakota Feldspar Mine
Pink Monster Mine
Pink Monster Mine
Smith Feldspar Mine
Greene Feldspar Mine
Phenacite Feldspar Prospect
Pringle Beryllium Mine
* 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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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.