South Dakota · Lawrence County
Past Producer
American Express Mine
Lawrence County, South Dakota, United States
Silver
Gold
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USGS source ↗
Commodities
Primary
Silver, Gold
Commodity type
M
Deposit
Deposit type
Replacement
Deposit size
S
Ore control
Vertical Fractures Trending Northeast; Lower Contact Zone; Below The Sill
Materials
Ore minerals
Gold, Silver
Geology
Associated rock
Rhyolite · Rhyolite Sill
Economic & production
Development status
Past Producer
Identification
Deposit ID
10055471
MRDS ID
SD02024
Alternate names
Imperial Mine, Chance, Costello Claim, Costello Fraction, Dolphin, Greenough, Winneshiek, Rudolph Claims
Region
NA
Data score
C
Coordinates
44.38024, -103.77975
References
US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688