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Breckenridge District, Summit Co., Colorado, USA
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Also known as Bevan, Union or Minnesota district. Au, Zn, Pb, Ag.

HISTORY
In the summer of 1859 a group of prospectors discovered rich placer ground on the north side of Farncomb Hill, and within the next 20 years about $7,000,000 in gold was washed from the placers of the Blue River, Swan River, French Gulch, Illinois Gulch, and their tributary gulches. It was not until 1880 that gold was found in place on Farncomb Hill; for the next 10 years the rich narrow vein of crystallized gold yielded most of the gold output. Gold dredges were introduced in 1898 and have been working the deep gravels of the larger gulches ever since, recovering a total of a little more than $7,OO0,000 in gold through 1937.
Lead-silver ores were first mined in the district in 1869, but little interest was shown in lead veins until the completion of the railroad from Denver to Breckenridge in 1880.


A wide variety of ore and gangue minerals has been found in the Breckenridge district, but the only ore minerals sufficiently abundant to be of commercial importance are gold, various silver minerals, sphalerite, galena, and pyrite. Contact-metamorphic ores, stock-works, veins, blanket ores, and placers have been exploited, but most of the output has come from the veins and placers.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Acanthite
Albite
var: Andesine

'Allanite'
Amphibole Supergroup
Andradite
Anglesite
Ankerite
Augite
Azurite
Baryte
Bismuth
Bismuthinite
Calcite
Cerussite
Chalcopyrite
Chlorargyrite
'Chlorite Group'
Chrysocolla
Epidote
Fluorite
Galena
'Garnet'
Goethite
Gold
Gypsum
Hematite
'Hypersthene'
Iridium
Jarosite
Kaolinite
Lead
'Limonite'
Magnetite
Malachite
Marcasite
Microcline
Muscovite
var: Sericite
Orthoclase
Platinum
Pyrite
Quartz
Quartz
var: Jasper

Rhodochrosite
Siderite
Silver
Smithsonite
Sphalerite
Sulphur
Tetrahedrite
Titanite
Vanadinite
'Wad'
Wulfenite
Zircon


73 entries listed. 46 valid minerals.

Localities in this Region

USA
USA

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

- Ransome, F. L. (1911) Geology and ore deposits of the Breckenridge district, Colorado. USGS Prof Paper 75

- Lakes, Arthur (1912) Geology of the Breckenridge Placers. Mines and Minerals - Feb, 1912.

- Raines, E. and Smith, A.E. (1987). "Famous mineral localities: Breckenridge, Colorado." Mineralogical Record, 18(1): 51-61.

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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