Gilliland Creek

Mine, Undetermined

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale EA
Quadrangle map, 1:63,360-scale A-1
Latitude 64.1688
Longitude -141.4212
Nearby scientific data Find additional scientific data near this location
Location and accuracy Gilliland Creek is a small north headwater tributary of Jack Wade Creek. Placer workings are present near the mouth of the creek. The coordinates correspond to the approximate location of the workings, in section 35, T. 28 N., R. 20 E., of the Copper River Meridian. The location is accurate. This site is locality 102 of Burleigh and Lear (1994), locality 31 of Eberlein and others (1977), and locality 59 of Cobb (1972 [MF-393]).

Geologic setting

Geologic description

Bedrock in the Gilliland Creek area consists of Paleozoic amphibolite-facies paragneiss, quartzite, amphibolite, schist, and marble (Szumigala and others, 2002). Near the head of the creek, the metamorphic rocks are intruded by granitic and pegmatitic dikes that are compositionally and mineralogically similar to Jurassic intrusions nearby.
Placer gold was recovered near the mouth of Gilliland Creek in an old channel about 125 feet wide; the channel is located west of Gilliland Creek, and the floor of this channel is 3 to 4 feet below the present creek level. The gravel is 5 feet thick and is overlain by 3 to 4 feet of muck. The gold has a fineness of 865 parts of gold per thousand and 129 parts of silver per thousand. Coarse gold was mined in the 1930s (Mertie, 1938).
Geologic map unit (-141.423485135285, 64.1684842176661)
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 Placer gold was recovered near the mouth of Gilliland Creek in an old channel about 125 feet wide; the channel is located west of Gilliland Creek, and the floor of this channel is 3 to 4 feet below the present creek level. The gravel is 5 feet thick and is overlain by 3 to 4 feet of muck. Coarse gold was mined in the 1930s (Mertie, 1938).
Indication of production Yes
Production notes The gold has a fineness of 865 parts of gold per thousand and 129 parts of silver per thousand (Mertie, 1938).

References