Two Johns Mine (Rua Group Mine), Bald Mountain Mining District (Portland Mining District), Lawrence County, South Dakota, USAi
| Regional Level Types | |
|---|---|
| Two Johns Mine (Rua Group Mine) | Mine |
| Bald Mountain Mining District (Portland Mining District) | Mining District |
| Lawrence County | County |
| South Dakota | State |
| USA | Country |
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Latitude & Longitude (WGS84):
44° 21' 25'' North , 103° 51' 38'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Central City | 130 (2017) | 7.1km |
| Lead | 2,999 (2017) | 7.6km |
| Deadwood | 1,258 (2017) | 10.6km |
| Spearfish | 11,283 (2017) | 14.9km |
| North Spearfish | 2,285 (2017) | 16.8km |
Mindat Locality ID:
121847
Long-form identifier:
mindat:1:2:121847:6
GUID (UUID V4):
f11b66a8-3e39-4b7b-a3e4-204de315ebbe
REF:US BUREAU OF MINES, 1954 , BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART I, BUREAU OF MINES INFORMATION CIRCULAR 7688P.56
Deposit:: SHAPIRO & GRIES,1970,USGS HEAVY METALS PROGRAM CONTRACT #14-
Deposit:: -10650 P 76
Deposit:: THIS COMBINDS THE TWO NEARLY CONTIGUOUS CLAIMS,UPPER & LOWER
Deposit:: HNS,WITH THE UPPER TWO JOHN
Commodities (Major) - Silver, Gold
Deposit Type: Replacement
Development Status: Past Producer
Host Rock Unit: Deadwood Formation
Structure: North Trending Fault With 500 Ft. Throw
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| ⓘ | Silver | 1.AA.05 | Ag |
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