Holmason and Helde (ARDF #NM290) Cu

Holmason and Helde

Prospect, Inactive

Commodities and mineralogy

Main commodities	Cu
Ore minerals	chalcopyrite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale	NM
Quadrangle map, 1:63,360-scale	C-1
Latitude	64.7254
Longitude	-165.3584
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The Holmason and Helde lode prospect is at an elevation of about 350 feet in the headwaters of an unnamed east tributary to Goldbottom Creek. It is 0.8 mile due east of the Snake River road, in the NW1/4 section 7, T. 9 S., R. 33 W., Kateel River Meridian. This is locality 6 of Hummel (1962 [MF 247]) and 34 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).

Geologic setting

Geologic description Hummel (1962 [MF 247, locality 6]) reported copper and iron sulfides at this site. The deposit is near the contact between graphitic mica schist and graphitic quartz schist (mapping by Kennecott Exploration Co., 1994-5). Some marble occurs in the graphitic mica schist unit. No other information about the prospect is available.
Geologic map unit	(-165.361018758332, 64.7246386869634)
Alteration of deposit	Oxidation?

Production and reserves

Workings or exploration	Some surface prospecting pits may be present.
Indication of production	None

References

MRDS Number	A012808
References Cobb, E.H., 1972, Metallic mineral resources map of the Nome quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-463, 2 sheets, scale 1:250,000. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Nome quadrangle, Alaska: U.S. Geological Survey Open-File report 78-93, 213 p. Hummel, C.L., 1962, Preliminary geologic map of the Nome C-1 quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-247, 1 sheet, scale 1:63,360.
Reporters	C.C. Hawley and Travis L. Hudson
Last report date	7/10/2000