Willow Creek

Mine, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale RB
Quadrangle map, 1:63,360-scale B-6
Latitude 64.41014
Longitude -155.58144
Nearby scientific data Find additional scientific data near this location
Location and accuracy Willow Creek is a southwest-flowing headwater tributary of Basin Creek. A misprint on the USGS Ruby Quadrangle map (1952, limited revisions in 1984) renames Willow Creek as Swift Creek. Coordinates given correspond to the Willow Creek location 11 of Cobb (1972 [MF405]), and mark the center of tailings shown on the USGS Ruby (B-6) Quadrangle map (1952, minor revisions in 1973). The tailings are in the headwater section of the creek, in section 36, T. 12 S., R. 16 E. of the Kateel River meridian The location is accurate.

Geologic setting

Geologic description

The bedrock under the mined areas of Willow Creek is greenstone and argillite, although the creek apparently drains a contact zone between schist and greenstone (Mertie, 1936; Eberlein and others, 1977). The gravels in the creek contain a carbonaceous layer, sheared chert, greenstone, sandy phyllite and schist, and some vein quartz (Mertie and Harrington, 1916; Mertie, 1936).
The pay streak was in the present day creek bottom and is about 10 feet wide and ran 25 to 30 cents per square foot of bedrock (gold at $20.67 per ounce) (Mertie, 1936). The gold is present in the lower one foot of gravel before bedrock and within the top foot of bedrock. The gold is both fine and coarse; at least one nugget weighed about 2.4 ounces (Mertie and Harrington, 1916).
In 1915, the upper part of the creek, where the ground was 5 to 6 feet deep, was worked using open-cut methods (Mertie and Harrington, 1916). Farther downstream in 1915, miners sluiced off 10 to 12 feet of muck and then mined 6 to 8 feet of gravel. Mining by these methods was nearly continuous until 1933 (Mertie, 1936).
Geologic map unit (-155.583862603569, 64.4095333736329)
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 A few exploration holes were sunk about 1 mile from the mouth of Willow Creek, and gold was reported (Mertie and Harrington, 1916). In 1915, the upper part of the creek, where the ground was 5 to 6 feet deep, was worked using open-cut methods (Mertie and Harrington, 1916). Farther downstream in 1915, miners sluiced off 10 to 12 feet of muck and then mined 6 to 8 feet of gravel. Mining by these methods was nearly continuous until 1933 (Mertie, 1936).
Indication of production Yes; small

Additional comments

The USGS Ruby quadrangle map (1952, with limited revisions in 1984) misnames Willow Creek as the neighboring Swift Creek.

References