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Ontario-Key West-Boss-Gold Flake-Fair Fountain-Bondholder Mine group, Farncomb Hill, French Gulch, Breckenridge Mining District, Summit Co., Colorado, USAi
Regional Level Types
Ontario-Key West-Boss-Gold Flake-Fair Fountain-Bondholder Mine groupGroup of Mines
Farncomb HillHill
French GulchGulch
Breckenridge Mining DistrictMining District
Summit Co.County
ColoradoState
USACountry

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Key
Latitude & Longitude (WGS84):
39° 29' 15'' North , 105° 57' 37'' West
Latitude & Longitude (decimal):
Locality type:
Group of Mines
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Breckenridge4,896 (2017)6.7km
Blue River904 (2017)9.6km
Keystone1,079 (2011)12.6km
Frisco3,035 (2017)15.2km
Copper Mountain385 (2011)15.7km


Former Ag-Zn-Pb-Au occurrences/mine group located in sec. 35, T6S, R77W, 6th PM, on Humbug and Farncomb Hills. MRDS database stated accuracy for this location is 250 meters.

Local rocks include the Cretaceous Pierre Shale.

Workings include underground openings comprised of several adits and shafts (Bondholder Mine: adit; Boss Mine: adit; Fair Mine: adit; Fountain Mine: shaft; Gold Flake Mine: adit; Key West Mine: adit; Ontario Mine: shaft).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Detailed Mineral List:

Calcite
Formula: CaCO3
Reference: USGS Proffesional Paper 75
Gold
Formula: Au
Description: Pseudomorph after sylvanite
Reference: Minerals of Colorado (1997) E.B. Eckel; USGS Proffesional Paper 75; R. P Rothwell (1898) The Mineral Industry, its statistics, technology and trade. Vol. 6 Scientific Publishing Co., New York
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Minerals of Colorado (1997) E.B. Eckel; R. P Rothwell (1898) The Mineral Industry, its statistics, technology and trade. Vol. 6 Scientific Publishing Co., New York
'Wad'
Reference: Minerals of Colorado (1997) E.B. Eckel

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Gold1.AA.05Au
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Wad'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Gold1.1.1.1Au
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Unclassified Minerals, Mixtures, etc.
'Limonite'-(Fe,O,OH,H2O)
'Wad'-

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
CCarbon
C CalciteCaCO3
OOxygen
O Limonite(Fe,O,OH,H2O)
O CalciteCaCO3
CaCalcium
Ca CalciteCaCO3
FeIron
Fe Limonite(Fe,O,OH,H2O)
AuGold
Au GoldAu

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Rothwell, R. P. (1898), The Mineral Industry, its statistics, technology and trade. Volume 6, Scientific Publishing Company, New York, NY.
Ransome, F.L. (1911), Geology and Ore Deposits of the Breckenridge District, Colorado, USGS Professional Paper 75, 187 pp.
Raines, E. and Smith, A.E. (1987). "Famous mineral localities: Breckenridge, Colorado." Mineralogical Record, 18(1): 51-61.
Wilson, Anna B. and La Rock, Edward J. (1991), ASCII database for Principal Lode Mines and Mineralized Areas in Southern Summit County, Colorado, USGS Open File Report 91-0027A and B, 22 pp. and one diskette.
Wilson, Anna B. and La Rock, Edward J. (1992), Map showing mineralized areas and principal lode mines in southern Summit County, Colorado, Miscellaneous Field Studies Map 2163, scale 1:50,000
Eckel, Edwin Butt, Robert R. Cobban, Shirley K. Mosburg (1997), Minerals of Colorado, updated & revised., 676 pp., Fulcrum Publishing [ ISBN-10: 1555913652; ISBN-13: 978-1555913656 ].
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, deposit ID #10018292.
USGS MRDS ID #DC05168.

USGS MRDS Record:10018292

Other Regions, Features and Areas containg this locality

North America
North America PlateTectonic Plate

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