Asmyrahha

The Asmyrahha is a zinc 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: Asmyrahha

Commodity

Primary: Zinc

Location

State: Alaska
District: McGrath

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: Mississippi Valley, S.E. Missouri Pb-Zn

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Ferricrete oxidation at surface.

Rocks

Role: Host
Age Type: Host Rock
Age Young: Silurian

Analytical Data

Not available

Materials

Ore: Smithsonite
Gangue: Dolomite

Comments

Comment (Exploration): Status = Inactive

Comment (Geology): Age = Host rocks are Silurian; age of mineralization is unknown.

Comment (Reference): Primary Reference = Andrews and Rishel, 1982

Comment (Geology): Geologic Description = Smithsonite-bearing rubble is exposed for 150 feet (45 m) of strike length in an old burn area. Host rock for the mineralization is a banded to micritic limestone that is probably equivalent to the Paradise Fork Formation of Dutro and Patton (1982); this is the 'Sic' unit of Andrews and Rishel (1982). The age of the mineralization is unknown. Smithsonite bearing carbonate units strike N 50 E and dip approximately 55 degrees South. Smithsonite mineralization is parallel to the strike of the limestone, but dips 15 degrees South along a low angle structure. Grab samples of the gossan contain up to 8.4 percent zinc with no appreciable lead. A trench cut at right angles to the strike of the ridgeline averaged 0.5 percent zinc and no lead across 10 feet (3 m).

Comment (Deposit): Model Name = Southeast Missouri lead-zinc (Cox and Singer, 1986; model no. 32a) or Mississippi Valley Type

Comment (Workings): Workings / Exploration = The Asmyrahha prospect was discovered by WGM Inc. and Patino Ltd. during exploration for base metals in the late 1970s on lands selected by Doyon Ltd. (Andrews and Rishel, 1982). Grab samples of the gossan contain up to 8.4 percent zinc with no appreciable lead. A trench that was cut at right angles to the strike of the ridgeline averaged 0.5 percent zinc and no lead over 10 feet (3 m).

Comment (Deposit): Other Comments = See Soda Creek (MD056), Midway (MD046), and Saddle (MD054) and other Mississippi Valley Type zinc-lead showings in the Medfra quadrangle. The Asmyrahha prospect is on land selected or conveyed to Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave., Fairbanks, Alaska, 99701.

References

Reference (Deposit): Dutro, T.T. Jr., and Patton,W.W. Jr., 1982, New Paleozoic Formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.

Reference (Deposit): Andrews, Tom, and Rishel, John, 1982, Annual Report for 198, Reef Ridge I-to-XIII Project Areas, Kuskokwim Block, Alaska: Anchorage, Alaska, WGM Inc., Project Report 4, 45 pages, two sheets at 1:63,360 and 1:20,000 scales. (Report held by Doyon, Limited, Fairbanks, Alaska.)

Reference (Deposit): Schmidt, J.M., 1997, Shale-hosted Zn-Pb-Ag and barite deposits of Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska, 1997: Economic Geology Monograph 9, p. 35-65.

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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