Irad

Prospect in Alaska, United States with commodity Gold

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Materials information
Nearby scientific data
Economic information about the deposit and operations
Mining district
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10307438
Record type	Site
Current site name	Irad

Geographic coordinates

Geographic coordinates:	-148.00895, 64.86866 (WGS84)
Relative position	The Irad prospect is near the head of the east fork of Eva Creek at an elevation of about 1,000 feet. It is about 1.5 miles north-northeast of the town of Ester in the SW1/4 sec. 32, T. 1 N., R. 2 W., Fairbanks Meridian.

Site location context

Political divisions (FIPS codes)

Fairbanks North Star(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fairbanks D-3(quadrangle 1:63,360 scale)

Fairbanks N(quadrangle 1:100,000 scale)

Fairbanks C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country	State
United States	Alaska

Commodities

Commodity	Importance
Gold	Primary

Materials information

Materials	Type of material
Gold	Ore

Nearby scientific data

(1)	-148.00895, 64.86866	ListMap

Economic information

Comments on the geologic information

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).

Economic information about the deposit and operations

Development status	Prospect

Comments on exploration

Status = Inactive

Mining district

District name	Fairbanks

Comments on the workings information

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.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Alaska Resource Data File	ARDF	FB045

Bibliographic references

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.)
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.

Comments on the references

Primary Reference = Rogers and others,1998

General comments

Subject category	Comment text
Deposit	Model Name = Schist-hosted gold-quartz vein

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	31-JUL-01	J.R. Guidetti Schaefer and C.J. Freeman	Avalon Development Corporation

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.