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Craig

Prospect, Inactive

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Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; magnetite; pyrite; pyrrhotite

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale B-4
Latitude 56.4652
Longitude -131.2605
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect consists of about 60 claims staked in 1977 about 4 miles west-northwest of Mt. Pounder. Their location is not well known and somewhat arbitrarily, the center of the claims is plotted about 0.5 mile east of the center of section 30, T. 62 S., R. 91 E., of the Copper River Meridian. This location may be a mile or more from the center of the claims.

Geologic setting

Geologic description

Sixty 'Craig' claims were staked here in 1977 but were allowed to lapse after two years; there apparently has been no activity since.
The country rocks in the general area of the Craig occurrence are Mesozoic or Paleozoic metasedimentary rocks, locally including marble, and subordinate metavolcanic rocks (Elliott and Koch, 1981; Koch, 1996).
As described by Elliott and Koch (1981), the mineralization consists of chalcopyrite, pyrite, and pyrrhotite disseminated in the metasedimentary rocks; the chalcopyrite also occurs in thin veinlets. Skarn float at or near the prospect contains magnetite and minor chalcopyrite. Still and others (2002) sampled rubblecrop from talus in the area. Several samples contained layered and disseminated sulfides, mainly pyrite; with disseminated chalcopyrite. A sample of hornblendite (skarn?) with 25 percent sulfides, mainly pyrite and pyrrhotite, contained 5,706 parts per million (ppm) copper and 3.1 percent zinc. Sample with layered and disseminated pyrite contained negligible base metal values and the highest gold value in the 7 samples that were selected for analysis was only 30 parts per billion gold.
Geologic map unit (-131.262206403631, 56.4648596753725)
Mineral deposit model Layered and disseminated sulfides in metamorphic rocks and skarn.
Age of mineralization Mesozoic or Paleozoic (?).

Production and reserves

Workings or exploration Sixty 'Craig' claims were staked here in 1977 but were allowed to lapse after two years; there apparently has been no activity since. Limited sampling by the U.S.G.S. and Bureau of Land Management.
Indication of production None

References

MRDS Number A010216

References

Still, J.C., Bittenbender, P.E., Bean, K.W., and Gensler, E.G., 2002, Mineral assessment of the Stikine area, central southeast Alaska: Bureau of Land Management Technical Report 51, 560 p.
Reporters H. C. Berg (Fullerton, California); D.J. Grybeck (Port Ludlow, WA)
Last report date 3/4/2008