Montana · Granite County
Past Producer
Royal Mine
Granite County, Montana, United States
Gold
Silver
Lead
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USGS source ↗
Commodities
Primary
Gold
Secondary
Silver, Lead
Commodity type
M
Deposit
Deposit size
S
Workings
Underground
Orebody form
TABULAR
Ore control
Best Ore Found In Granite Near The Porphyry Dike.
Materials
Ore minerals
Galena, Gold
Gangue
Pyrite, Quartz
Geology
Host rock
Granite
Associated rock
Granite · Royal Stock;Granite Porphyry
Structure
Philipsburg Batholith, Royal Stock
Tectonic setting
Cordilleran Miogeosyncline
Alteration
Biotite And Feldspar In Granite Altered To Calcite, Sericite, And Chlorite.
Economic & production
Development status
Past Producer
First production
1890
Identification
Deposit ID
10105712
MRDS ID
W014637
Alternate names
Royal Basin Dump
Region
NA
Data score
B
Coordinates
46.41072, -113.09258
References
USGS PP 78, P. 246-47.SILVERMAN, BILLINGS SOC. 16TH FIELD CONFERENCE