Mine detail: Two Johns Mine

Previously called 'Rua Group Mine'

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Location

Lat / long:

44.3569, -103.86114

Resource(M)

Primary:	Gold, Silver
Ore:	Gold, Silver

Production

Operation type:	Unknown
Deposit type:	Replacement
Production size:	Small
Development status:	Past Producer
First production started:	1897

Geology

Associated rock:	Porphyry Sill
Associated type:	Plutonic Rock
Structure:	North Trending Fault With 500 Ft. Throw

References

MRDS	SD02095
DEP	10055527
Reference	US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688
Reporter	Barari, Rachel A.