Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities W
Ore minerals pyrite; scheelite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-2
Latitude 63.1395
Longitude -144.984
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence on the Daisy claims is along the West Fork Chistochina River about 1.2 mile above the confluence of West Fork Chistochina River and the main channel of the Chistochina River. It is in the SE1/4NW1/4 section 36, T. 20 S., R. 14 E., Fairbanks Meridian. The site corresponds to location 30 of Rose (1967) and is accurate. It is also near a location at which scheelite was panned from gravel of the West Fork Chistochina (Rose, 1967).

Geologic setting

Geologic description

A stock of granodiorite or quartz monzonite is exposed in outcrops on the north and south sides of the West Fork Chistochina River near this site (Rose, 1967). To the northwest, the intrusion is in contact with volcanic rocks that are locally pyritized and iron-stained. The gravel nearby in the West Fork Chistochina River probably contains some placer scheelite (Rose, 1967; W.J. Nokleberg, written communication, 1996).
The pyritized volcanic rocks and adjacent intrusion were covered by eight Daisy claims in 1966. The Daisy claims were part of an 85-claim group staked in 1985 by Norman Moore, possibly on a porphyry copper prospect (Rose, 1967).
Geologic map unit (-144.986218262314, 63.1390959436889)
Mineral deposit model Porphyry Cu? (Cox and Singer, 1986; model 20c?); Placer W.
Mineral deposit model number 20c?
Age of mineralization Holocene placer and Mesozoic pyritization.
Alteration of deposit Pyritic alteration of granitic and volcanic rocks.

Production and reserves

Workings or exploration Claims were staked in 1966; only limited surface sampling has been done.
Indication of production None


MRDS Number D002722


Reporters W.T. Ellis (Alaska Earth Sciences), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)
Last report date 7/13/2003