|Quadrangle map, 1:250,000-scale||HG|
|Quadrangle map, 1:63,360-scale||D-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||McCann Creek is a small stream that flows north from the northern end of Red Mountain to Smalls River. The Platinum to Goodnews Bay Mining Camp road crosses McCann Creek at its confluence with Smalls River, which is 2 miles northeast of the summit of Red Mountain. The map site is at an elevation of about 200 feet on McCann Creek. This occurrence is included in locality 8 of Cobb (1972 [MF 362]; 1980 [OF 80-909]).|
Geologic descriptionPlatinum-group metals have been identified in this creek but no workable pay streak has been found. PGM-rich material contains 95.5 percent Pt, 2.8 percent Ir, 1.2 percent Rh, and 0.5 percent Pd (Mertie, 1976). The creek flows across Paleozoic or Mesozoic sedimentary and igneous rocks that are intruded by the Jurassic Red Mountain ultramafic pluton (Hoare and Coonrad, 1978). Dunite of this pluton is within a few hundred feet of the upstream limit of the creek.
|Geologic map unit||(-161.712226626921, 58.9792168173707)|
|Mineral deposit model||Placer PGE-Au (Cox and Singer, 1986; model 39b)|
|Mineral deposit model number||39b|
|Age of mineralization||Quaternary.|
|Workings or exploration||Some exploration drill holes have probably been drilled along this creek; no mining has been reported.|
|Indication of production||None|
|Reserve estimates||Fechner (1988, p. 28) estimates that there are 500,000 cubic yards of material grading 0.0030 ounce of PGM per cubic yard in McCann Creek.|
Cobb, E.H., 1977, Placer deposit map of central Alaska: U.S. Geological Survey Open-File Report 77-168-B, 64 p., 1 map, scale 1:1,000,000.
Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.
|Reporters||Travis L. Hudson|
|Last report date||3/18/2001|