|Quadrangle map, 1:250,000-scale||LH|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at the toe of a glacier in small south tributary valley to the upper Chilligan River. It is at an elevation of about 4,800 feet, 0.4 mile southwest of peak 6017. The map site is in the SW/4 section 9, T 15 N, R22 W, of the Seward Meridian. It is locality 16 of MacKevett and Holloway (1977), locality 40 of Gamble and others (1989), and it is included under the name Pass Lake by Cobb and Reed (1981). It is approximately located, perhaps within one-half mile.|
Geologic descriptionThis occurrence represents an approximately 5-square-mile area of local base metal geochemical anomalies (Resource Associates of Alaska, 1976). At the map site, Tertiary biotite granite float containing disseminated molybdenite assayed 960 ppm molybdenum. Tertiary granite throughout the area locally contains molybdenite, pyrite, and pyrrhotite, and, less commonly, chalcopyrite and sphalerite. At least some of the mineralization is probably in quartz veins.
|Geologic map unit||(-153.235615381585, 61.3991696672407)|
|Mineral deposit model||Porphyry Cu-Mo (Cox and Singer, 1986, model 21a)|
|Mineral deposit model number||21a|
|Age of mineralization||Tertiary. Sulfide mineralization is in Tertiary granitic rocks.|
|Alteration of deposit||Quartz veining(?).|
|Workings or exploration||Reconnaissance surface observation and sampling has been completed in this area.|
|Indication of production||None|
Additional commentsThis occurrence is within Lake Clark National Park.
Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-1343-A, 25 p.
Gamble, B.M., Bailey, E.A., and Reed, B.L., 1989, Gold occurrences near Snowcap Mountain, Lime Hills B-2 quadrangle, Alaska: U.S. Geological Survey Open-File Report 89-0646, 8 p.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, Contract JO166108, 7 v.
|Reporters||Travis L. Hudson and Madelyn A. Millholland|
|Last report date||6/10/2001|