Keystone, South Dakota
The Star Lode is near 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 Star 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 20 meters (65 feet). The ore mined is composed of lepidolite, mica and beryl. The ore body extends 6 meters (20 feet) in width. Associated rock in this area is pegmatite 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.
Site identification and general characteristics. Learn about USGS mines.
Additional textual information about a site or mine.
Formal or informal mining district names.
Workings at the site.
DEVELOPMENT INCLUDES AN INCLINED SHAFT, AN OPENCUT, A SMALL DRIFT AND A STOPE.
Characteristics of the ore body.
Geological materials at the site.
Physiographic area where the resource is found.
Other deposits in the same region.
Wood Tin Lode
Ferguson Lode Claim
Glendale Gp Beryllium Prospect
* 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.
Learn more about the Bureau of Land Management, Public Land Survey System, and mining claims.
Understanding Claim Ownership
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Understanding BLM Administrative Areas
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Understanding Location Data
Mine handled by the Bureau of Land Management are not mapped by latitude and longitude, instead, these mines harken back to the Public Land Survey System.
A “township” can refer to two different things. Both are part of the PLSS measurement system but have different uses.
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