Irad

The Irad 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: Irad

Commodity

Primary: Gold

Location

State: Alaska
District: Fairbanks

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

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Gold

Comments

Comment (Exploration): Status = Inactive

Comment (Deposit): Model Name = Schist-hosted gold-quartz vein

Comment (Geology): Geologic Description = The rocks in the vicinity have been mapped as a bleached feldspathic schist unit of the Fairbanks Schist by Newberry and others (1996). However, this rock type was not seen in a trench excavated by Placer Dome Exploration in 1997; the rock exposed in these trenches appears to be more similar to the Fairbanks Schist described elsewhere as quartz-muscovite schist (Rogers and others, 1998). In 1990 to 1992, American Copper and Nickel Co. (ACNC) collected soil samples from the surrounding area. In 1998, Placer Dome Exploration conducted a soil program that identified a 300-meter by 100-meter soil anomaly of gold with upper values that varied from 500 to 1,000 ppb gold (Roger and others, 1998). The anomalous soils occur near the intersection of a northeast and northwest trend of anomalous soils that cross Ester Dome. The northeast trend has been interpreted to be related to a high-angle fault that transects the McQueen and Rhyolite prospects (FB011 and FB016, respectively) (Rogers and others, 1998). Follow-up trenching produced discouraging results; no sample containing more than 0.4 ppm gold. A magnetic high was identified over the prospect in both State of Alaska and ACNC airborne geophysical surveys. A ground-based geophysical survey conducted by Placer Dome Exploration gave similar results (Rogers and others, 1998).

Comment (Reference): Primary Reference = Rogers and others,1998

Comment (Workings): Workings / Exploration = Several old prospect pits were identified in the area. In 1990 to 1992, American Copper and Nickel Co. (ACNC) collected soil samples from the surrounding area. In 1998, Placer Dome Exploration conducted a soil program that identified a 300-meter by 100-meter anomaly in gold. Follow up work consisted of trench excavation. The prospect was then covered with a ground-based magnetic geophysical survey (Rogers and others, 1998). Airborne geophysics were conducted both by the State of Alaska and ACNC.

References

Reference (Deposit): Newberry, R.J., Bundtzen, T.K., Clautice, K.C., Combellick, R.A., Douglas, T., Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary geologic map of the Fairbanks mining district, Alaska: Alaska Division of Geological and Geophysical Surveys Public Data File 96-16, 17 p., 2 sheets, scale 1:63,360.

Reference (Deposit): Rogers, J.A., McCoy, D. T., Nerup, M., Yuengling, K., Bean, K., Cameron, C., Grahm, G., Frantz, P., and Athey, J., 1998, Placer Dome-Silverado lease, 1998 annual report for Ester Dome: 68 p. (Report held by Range Minerals, Inc., North Pole, AK 99705.)

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