Unnamed (head Lucky Six Creek near Gull Pass) (ARDF #SP012) Ag, Au, Cu, Sb

Unnamed (head Lucky Six Creek near Gull Pass)

Prospect, Inactive

Commodities and mineralogy

Main commodities	Ag; Au; Cu; Sb
Ore minerals	bornite; chalcopyrite; malachite; pyrite; stibnite

Geographic location

Quadrangle map, 1:250,000-scale	SP
Quadrangle map, 1:63,360-scale	C-4
Latitude	67.628
Longitude	-154.8167
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The site is based on early descriptions of several mineral prospects and minor placer gold production on Lucky Six Creek (Schrader 1904). The prospects apparently were not visited by Schrader who based their location on reports by prospectors. Their exact location remains undetermined. The coordinates are that of a sample with metal values collected by Kurtak and others (2002). Their sample site is about 1.7 miles north of Gull Pass and about 0.5 mile east of the center of section 33, T. 26 N., R. 18 E. Kurtak's location is accurate but the old Schrader location is vague. Also see ARDF SP012, Lucky Six Creek, which is nearby and may refer to the same site.

Geologic setting

Geologic description Based solely on information from prospectors, Schrader (1904) reported that six or more quartz veins, 10 to 75 ft. thick, occur in a belt 6 miles long. Samples given to him by prospectors contained pyrite, chalcopyrite, bornite, malachite, and stibnite. The veins were reported to have been discovered in 1902-1903. The country rock in the area is marble interlayered with chlorite schist of the Devonian and Silurian Skajit Limestone (Nelson and Grybeck, 1980). Kurtak and others (2002) collected a sample of quartz-carbonate float with tetrahedrite(?), malachite, and azurite in Lucky Six Creek about 1.7 miles north of Gull Pass. The sample contained 43 parts per million (ppm) silver, 672 ppm arsenic, and 3,580 ppm antimony.
Geologic map unit	(-154.819491811398, 67.6275049413241)
Mineral deposit model	Unclear; only a vague early report of mineralization.
Age of mineralization	Silurian or younger based on the age of the host rocks.
Alteration of deposit	None.

Production and reserves

Workings or exploration	Minor prospecting in the early 1900s. The area was examined by several government parties from the early 1980 to 2002; none found any significant mineralization.
Indication of production	Undetermined
Reserve estimates	None.
Production notes	None.
Additional comments Located in Gates of the Arctic National Park.

References

MRDS Number	A011924
References Grybeck, D.J., and Nelson, S.W., 1981, Mineral deposit map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-F, 1 sheet, scale 1:250,000. Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Maclean, E.A., 2002, Mineral investigations in the Koyukuk mining district, Alaska: Bureau of Land Management Technical Report 50, 2 vols., paged by sections. Nelson, S.W., and Grybeck, D.J., 1980, Geologic map of the Survey Pass quadrangle, Brooks Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1176-A, 2 sheets, scale 1:250,000. Schrader, F.C., 1904, A reconnaissance in northern Alaska across the Rocky Mountains, along Koyukuk, John, Anaktuvuk, and Colville rivers and the Arctic coast to Cape Lisburne, in 1901, with notes by W.J. Peters: U.S. Geological Survey Professional Paper 20, 139 p.
Reporters	S.W. Nelson (Anchorage, Alaska); D.J. Grybeck (Contractor, USGS)
Last report date	2/1/2011