Won - North

The Won - North is a silver and tin 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

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Site Name

Primary: Won - North
Secondary: Stockwork Zone
Secondary: Standoff Ridge

Commodity

Primary: Silver
Primary: Tin
Secondary: Lead
Secondary: Antimony
Secondary: Arsenic
Secondary: Copper
Secondary: Zinc

Location

State: Alaska
District: Innoko

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

Physiography

Not available

Mineral Deposit Model

Model Name: Sn-polymetallic vein

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Axinite and sericite.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Tetrahedrite
Ore: Sphalerite
Ore: Chalcopyrite
Ore: Cassiterite
Ore: Arsenopyrite
Gangue: Tourmaline
Gangue: Quartz
Gangue: Axinite

Comments

Comment (Reference): Primary Reference = Burleigh, 1992 (BMOFR 85-92)

Comment (Reserve-Resource): Reserves = No reserves were calculated from the drill program.

Comment (Deposit): Other Comments = See Won - South (MD024) and Gemini (MD023) prospects.

Comment (Workings): Workings / Exploration = The U.S. Geological Survey AMRAP program of the Medfra quadrangle (King and others, 1980, 1983; Patton and others, 1980) reported anomalous values of arsenic, bismuth, tin, silver, tungsten, and lead in stream sediment and pan concentrate samples from streams draining the project area. Duval Corporation and Anaconda Minerals Company followed up on these anomalies and found the Won-North prospect. In 1984, Anaconda Minerals company drilled the Standoff Ridge zone, and encountered up to 0.14 percent tin and 4.6 ounces/ton silver over narrow, sheeted veins up to 6 feet (1.8 m) wide. Online Exploration Services Inc., Anchorage, Alaska, has continued exploration at the Won-North prospect in recent years.

Comment (Geology): Age = Late Cretaceous-early Tertiary, inferred based on ages of nearby plutonic rocks (Bundtzen and Miller, 1997).

Comment (Geology): Geologic Description = The Won - North prospect is the northern-most group of silver-tin prospects that have been referred to by Burleigh (1992; BMOF 85-92) as the 'Won' deposit. Mineralization occurs as moderately dipping breccia vein structures in thermally altered rocks of the Upper Cretaceous Kuskokwim Group. The Stockwork zone consists of stockwork quartz veining and crosscutting tourmaline breccias that can be traced on the surface for about 1,000 feet (300 m) by 250 feet (76 m). Small 0.5 to 2 inch (1.2 to 5.0 cm) thick quartz veinlets occur often, with a density of 30 per foot (0.3 m). The Standoff Ridge Zone is a series of four or more north 25 degrees west -trending vein structures that can be traced for about 1,500 feet (457 m). Arsenopyrite and cassiterite are the dominant ore minerals found in the various zones. Age of mineralization is inferred to be Late Cretaceous-Early Tertiary, based on ages of nearby plutonic rocks (Bundtzen and Miller, 1997). Anaconda Mineral Company drilled the property in 1984 and encountered up to 0.14 percent tin and 4.6 ounces/ton silver over narrow, sheeted veins up to six feet (1.8 m) wide.

Comment (Deposit): Model Name = Tin-polymetallic (Cox and singer, 1986; model no. 20b)

Comment (Exploration): Status = Active

References

Reference (Deposit): Bundtzen, T.K., and Miller, M.L., 1997, Precious metals associated with Late Cretaceous-early Tertiary igneous rocks of southwestern Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Economic Geology Monograph #9, Mineral Deposits of Alaska, p. 242-286.

Reference (Deposit): Burleigh, R.E., 1992, Tin mineralization at the Won prospect, west-central Alaska: U.S. Bureau of Mines Open-File Report 85-92, 19 pages.

Reference (Deposit): Patton, W.W., Jr., Moll, E.J., Dutro, J.T., Jr., Silberman, M.L., and Chapman, R.M., 1980, Preliminary geologic map of Medfra quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-811-A, 1 sheet, scale l:250,000.

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