Klery Creek

Mine, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities W
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale BM
Quadrangle map, 1:63,360-scale A-3
Latitude 67.18
Longitude -160.39
Nearby scientific data Find additional scientific data near this location
Location and accuracy This location includes placer ground on Klery Creek extending from the confluence of Bear Creek upstream to the confluence of Gold Run Creek downstream, a distance of approximately 13 miles. The description of Klery Creek includes Joe Gulch, a small left-limit tributary about 2 miles long, and Caribou Creek, a small right-limit tributary about 3 miles long just north of Jack Creek. Coordinates are for the mining camp of Klery Creek in section 34, T. 21 N., R. 8 W., of the Kateel River Meridian. Cobb (1972, MF-386), location 6 and Schmidt and Allegro (1988), location 281.

Geologic setting

Geologic description

Rocks in the area of Klery Creek include quartz-mica schist, mafic greenschist, calcareous schist, chloritic quartz schist, phyllite, graphitic schist and limestone of lower to mid-Paleozoic age. The limestone is bluish-white, thick bedded, fractured, and folded. The rocks are cut by steeply-dipping to vertical, milky quartz veins ranging from an inch to 30 feet wide. The bedrock in most of Klery Creek is schist. In the area of Klery Creek camp and downstream for perhaps 1/2 mile bedrock is a massive, much fractured, steeply-dipping limestone which transversely intersects the creek (Smith, 1913).
The gold placer deposits along Klery Creek are both in stream channel and bench deposits. Some of the richer deposits may have resulted from the reworking and reconcentrating of gold eroded from a paleo-channel. Smith (1911) reported two types of gold. One is coarse, angular, dark in color and often attached to or enclosed by quartz or black, graphitic schist. This type of gold occurs in a few locations along the streambed and in bench deposits. It is thought to be derived from the paleo-channel. Gold forms filaments in the black schist country rock, indicating that some of the placer gold was derived from this unit (Smith, 1913). The other type of gold is very fine and brightly colored. It is the more common gold found on the creek. An 8.5-ounce nugget of this type was found during the 1915 mining season (Brooks, 1916).
Pay gravels from 12 to 18 inches thick overlie schist bedrock. The pay gravels are overlain by 4 to 5 feet of overburden. During mining, the upper 1 to 2 feet of bedrock is taken up and processed. Depth to pay in the bench deposits varies from 6 to 20 feet. At the mouth of Klery Creek about 500 feet southeast of the mouth of Bear Creek, a shaft was sunk to a depth of 135 feet in frozen ground without hitting bedrock (Reed, 1932).
The ground on Klery Creek was said to run $1.10 per cubic yard in 1933 (gold at $20.67/ounce). This was a combination of both coarse and fine gold from a depth of 14 to 30 feet (Reed, 1932). Fineness of the coarse gold from Klery Creek was determined as 888.5 or a value of $18.50 per ounce. The fine gold, although not assayed, has a higher gold tenor and was worth $18.37 per ounce (Smith, 1913).
Concentrates contained much magnetite, some ilmenite, pyrite, limonite and very little garnet (Cobb and others, 1981). Three pan concentrate samples collected from the central portion of Klery Creek in 1978 contained tungsten values ranging from 10 to 18 ppm (Degenhart and others, 1978).
Geologic map unit (-160.392828568681, 67.1793819783617)
Mineral deposit model Placer Au (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Quaternary.
Alteration of deposit Limonite thought to be oxidized from pyrite.

Production and reserves

Workings or exploration Gold was first discovered on Klery Creek in 1909. Placer deposits were worked more or less continuously up to World War II. Mining operations resumed in the late 1940s when the ground was worked with a 3-cubic-yard dredge. The dredge worked for 6 years and was abandoned on the creek. In the late 1980s a small mine was in operation just upstream from the mining camp on Klery Creek for several years.
Indication of production Yes; small
Production notes Production from Klery Creek through 1931 estimated at 31,300 ounces (Schmidt and Allegro, 1988).

Additional comments

Klery Creek has a large drainage area and a confined stream bed which causes water to rise rapidly during heavy rains. his causes severe wash-out problems for placer mine operations.

References

MRDS Number A015610

References

Stevens, D.L., 1986, Report on a brief reconnaissance of the Klery Creek area, Baird Mountains quadrangle, Alaska: Stevens Exploration Management Company, Anchorage, Alaska, unpublished industry report, 8 p. (held by NANA Regional Corporation, Anchorage, Alaska).
Reporters Anita Williams (Anchorage, AK)
Last report date 12/29/1999