Unnamed (in the headwaters of an east fork of Ahtell Creek)

The Unnamed (in the headwaters of an east fork of Ahtell Creek) 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

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Site Name

Primary: Unnamed (in the headwaters of an east fork of Ahtell Creek)

Commodity

Primary: Gold

Location

State: Alaska
District: Chistochina

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Extensive silica-carbonate alteration of dioritic rocks.

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Magnetite
Ore: Gold
Ore: Pyrite
Gangue: Quartz

Comments

Comment (Reference): Primary Reference = WGM Inc., 1979

Comment (Geology): Age = Possibly related to a Jurassic diorite complex.

Comment (Exploration): Status = Inactive

Comment (Commodity): Gangue = Carbonate minerals

Comment (Geology): Geologic Description = The occurrence is in the Jurassic 'tectonic, diorite to quartz diorite complex' of Richter that underlies the eastern part of the Ahtell Creek area (Richter, 1966; Richter and Matson, 1968; Richter, Lanphere, and Matson, 1975). It was discovered in 1979 following up a 1978 stream sediment survey of the area for the Ahtna Native corporation (WGM Inc., 1979). It is within a several-mile-long, gold-bearing trend aligned northwest that was called area 1 by WGM Inc. WGM found six streams in the belt with gold values from 200 to 850 ppb gold. During the follow up at this location, WGM Inc.(1980) identified a 50-foot- wide silica-carbonate-altered diorite that contained 205 ppb gold. Up hill from the diorite, a 2-foot-thick hanging wall of a quartz-pyrite vein contained 335 ppb gold. A float cobble of magnetite from the same area contained 3,260 ppb gold (0.095 ounce of gold per ton). It is not known if further work has been done in the area.

Comment (Deposit): Other Comments = Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.

Comment (Workings): Workings / Exploration = Stream sediments collected by WGM in 1978 were followed up in 1979 by outcrop sampling.

Comment (Deposit): Model Name = Porphyry Au?

References

Reference (Deposit): WGM Inc., 1980, 1979 Summary report of gold potential, Slana District, Ahtna project: WGM Inc., 10 p., 1:63,360-scale map. (Report held by Ahtna Mineral Co., Anchorage, Alaska).

Reference (Deposit): WGM Inc., 1979, 1978 Annual Progress Report, Uranium Exploration, Ahtell Creek Area, Volume I: WGM Inc., 39 p., appendices and 4 maps. (Report available, Ahtna Mineral Co., Anchorage, Alaska).

Reference (Deposit): Richter, D.H., Lanphere, M.A., and Matson, N. A., Jr., 1975, Granite plutonism and metamorphism, Eastern Alaska Range, Alaska: Geological Society of American Bulletin, v. 86, p. 819-820.

Reference (Deposit): Richter, D.H., and Matson, N.A., 1968, Distribution of gold and some base metals in the Slana area, eastern Alaska Range, Alaska: U.S. Geological Survey Circular 593, 20 p.

Reference (Deposit): Richter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 2l, 36b p., 3 sheets, scale 1:63,360.

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