Alder Creek

Mine, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale CY
Quadrangle map, 1:63,360-scale A-6
Latitude 65.25
Longitude -143.7
Nearby scientific data Find additional scientific data near this location
Location and accuracy Alder Creek is a northwest-flowing tributary of Webber Creek, which drains into the Yukon River. Alder Creek is approximately 6 miles long. The exact location of placer mining on Alder Creek is unknown. The latitude and longitude coordinates correspond to an arbitrarily chosen point near the midpoint of the creek, in section 19, T. 5 N., R. 20 E., of the Fairbanks Meridian. The location is accurate to within 3 miles.

Geologic setting

Geologic description

There has been historic placer gold mining on Alder Creek, and the creek shows evidence of worked ground (Mertie, 1942).
The headwaters and upper portion of Alder Creek are underlain by Cretaceous to Tertiary conglomerate and other sedimentary rocks, but the creek then crosses a high-angle normal fault, and its lower half is underlain by Paleozoic to Precambrian metamorphic rocks (Dover and Miyaoka, 1988). The gold-bearing gravels at other placer mines within the quadrangle appear to be derived from the Cretaceous to Tertiary sedimentary rocks, and this may be the case with Alder Creek. This interpretation seems especially likely since Webber Creek, which Alder Creek joins, does not contain much, if any, gold (Cobb, 1976 [OFR 76-632]).
Geologic map unit (-143.702404648097, 65.2496534152157)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.

Production and reserves

Workings or exploration Alder Creek is a site of historic placer exploration with possible minor production.
Indication of production Yes
Production notes There has not been much, if any, placer gold produced from Alder Creek (Mertie, 1942).

Additional comments

See also Webber Creek (CY037). This site lies within the Yukon-Charley Rivers National Preserve.

References