|Quadrangle map, 1:250,000-scale||HU|
|Quadrangle map, 1:63,360-scale||B-2|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is on the north side of Koyukuk River, about 0.5 mile north-northwest of the junction of Red Mountain Creek and Koyukuk River. The occurrence is at an elevation of about 750 feet, 0.2 mile east-northeast of the center of section 2, T. 10 N., R. 23 E. of the Kateel River Meridian. The location is accurate within one-half mile.|
Geologic descriptionThis occurrence is marked by a prominent gossan in a small, hypabyssal intrusion of Cretaceous(?) latite porphyry (Patton and Miller, 1966). The porphyry contains disseminated pyrite. Samples contained trace amounts of gold, zinc, and other metals (Patton and Miller, 1966). The latite porphyry intrudes Cretaceous graywacke and mudstone. Samples of latite porphyry, quartzite, and slate collected by Kurtak and others (1999) do not contain anomalous gold or other metals.
|Geologic map unit||(-153.894240193133, 66.2963721990455)|
|Age of mineralization||Patton and Miller (1966) suggest that the latite porphyry is Cretaceous.|
|Alteration of deposit||Gossan formed by oxidation of disseminated pyrite.|
|Workings or exploration||Only surface sampling.|
|Indication of production||None|
Berg, H.C., and Cobb, E.H., 1967, Metalliferous lode deposits of Alaska: U.S. Geological Survey Bulletin 1246, 254 p.
Bottge, R.G., 1988, Maps summarizing land availability for mineral exploration and development in western Alaska, 1986: U.S. Bureau of Mines Open-File Report 14-88, 38 quadrangle overlays.
Cobb, E.H., 1972, Metallic mineral resources map of the Hughes quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-458, 1 sheet, scale 1:250,000.
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in five quadrangles in west central Alaska (Hughes, Kotzebue, Melozitna, Selawik, Shungnak): U.S. Geological Survey Open-File Report 75-627, 58 p.
Cobb, E.H., and Miller, T.P., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Hughes, Kotzebue, Melozitna, Selawik and Shungnak quadrangles, west-central Alaska; Supplement to Open-File Report 75-627; Part B, Lists of references to January 1, 1981: U.S. Geological Survey Open-File Report 81-847-B, 14 p.
Eberlein, G.D., Chapman, R.M., Foster, H.L., and Gassaway, J.S., 1977, Map and table describing known metalliferous and selected nonmetalliferous mineral deposits in central Alaska: U.S. Geological Survey Open-File Report 77-168-D, 132 p., 1 sheet, scale 1:1,000,000.
Grybeck, Donald, 1977, Map showing known mineral deposits of the Brooks Range, Alaska: U.S. Geological Survey Open-File Report 77-166-C, 45 p., 1 sheet, scale 1:1,000,000.
Kurtak, J.M., Klieforth, R.F., Clark, J.M., and Williams, E.M., 1999, Mineral investigations in the Koyukuk mining district, northern Alaska--Progress Report: U.S. Bureau of Land Management Open-File Report 74, 158 p.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||8/1/2002|