Twelvemile Creek Placer

The Twelvemile Creek Placer is a gold mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Twelvemile Creek Placer  

State:  Alaska

County:  na

Elevation:

Commodity: Gold

Lat, Long: 67.5, -151.50000

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Twelvemile Creek Placer

Twelvemile Creek Placer MRDS details

Site Name

Primary: Twelvemile Creek Placer
Secondary: Forks of Twelvemile Creek
Secondary: Potato Creek


Commodity

Primary: Gold


Location

State: Alaska
District: Koyukuk District


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

Not available


Mineral Deposit Model

Not available


Orebody

Not available


Structure

Not available


Alterations

Not available


Rocks

Not available


Analytical Data

Analytical Data: GOLD FINENESS 914 (BENCH).


Materials

Ore: Gold


Comments

Comment (Location): LOCATION MIDWAY BETWEEN UPPER FORK AND LOWER FORK. EXTENT OF PLACER NOT CLEARLY KNOWN, PROBABLY WITHIN 3 MI UPSTREAM AND DOWNSTREAM FROM LOCATION ON MAIN AND TRIBUTARY CHANNELS

Comment (Development): EXPL.COM: DRIFTING, SLUICING, HYDRALIC MINING (1937) PROPERTY WAS ACTIVE 1900-09, INTERMITTANTLY TO 1935 AND IN 1937.

Comment (Deposit): BURIED PLACER APPARENTLY MINOR CONTRIBUTOR TO PRODUCTION. GRAVELSON HIGH BENCH ARE 6 TO 9 FT THICK WITH GOLD THROUGHOUT.

Comment (Geology): GEOL.COM: GEOLOGY DESCRIPTION OF HIGHEST BENCH PLACER OF TWO PRESENT. BOULDERS UP TO 2 FT IN DIAMETER, PREDOMMANTLY GREENSTONE, MINOR QTZ DIORITE, GNEISS. ; MAJOR.UNITS: BEDROCK IS GRAPHITE AND QUARTZITE SCHIST.

Comment (Production): MAIN HIGH BENCH YIELDED 75 CENTS PER CU YD. SOME RAN 35 CENTS PER SQ FT BEDROCK (1937).


References

Reference (Production): USGS BULL 532, P. 69.

Reference (Deposit): USGS OFR 76-340, P. 163.

Reference (Deposit): REED, 1938, ALASKA DEPT OF MINES UNPUBL REPT, P. 105-111.

Reference (Deposit): USGS BULL 532, P. 69, 85.


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