Free Gold Mine (Silver Dollar; Big Horn No. 1; Copper Butte; Gold Spark; Lancaster; MS 17457), Manhattan District, Larimer Co., Colorado, USA
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Deposit:: LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS O F THE FRONT RANGE, COLORADO: USGS PROF. PAPER 223, P. 285-286.
Deposit:: COLORADO DIV. MINES INF. REPT. AND ANNUAL OPERATOR REPTS.
Commodities (Major) - Silver, Gold; (Trace) - Copper
Deposit Type: Vein
Development Status: Past Producer
Host Rock Unit: Metamorphic Rocks--Felsic And Hornblendic Gneisses, Laramide Intrusive Rocks--Quartz Monzonite Porphyry
Structure: Front Range Uplift, Sherman Batholith, Poudre River Shear Zone, Elkhorn Creek Shear Zone
Host Rock: Gneiss, Schist
Tectonic Structure: Central Cordillera (Southern Rocky Mtns)
2 entries listed. 2 valid minerals.
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