Lucky Jim

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities Cu; Pb
Ore minerals chalcopyrite; galena; gold; limonite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale MM
Quadrangle map, 1:63,360-scale C-2
Latitude 63.5833
Longitude -150.6974
Nearby scientific data Find additional scientific data near this location
Location and accuracy
The location of this prospect, which may coincide with that of the Lucky Jim prospect (Cobb, 1980 [OFR 80-363]), is at an elevation of about 4100 feet about 0.2 mile northeast of the top of Spruce Peak. The location is accurate; the correlation with the Lucky Jim prospect is uncertain.
Davis (1923), who first described the Lucky Jim prospect, did not specify its location. A prospect north of Spruce Peak is called Lucky Jim(?) by Bundtzen, Smith, and Tosdal (1976, occurrence 57), as is mineral deposit 263 by Hawley and Associates (1978). Apparently, the same prospect is number 65 of Bundtzen (1981), who called it the Mammoth or Lucky Jim(?). A prospect called Mammoth or Lucky Jim is occurrence 87 of Thornsberry, McKee, and Salisbury (1984). Regardless of the location of the Lucky Jim prospect, the correlation of the Mammoth with the Lucky Jim is unlikely. The Mammoth almost certainly is the same as the North Star prospect (see MM053).

Geologic setting

Geologic description

This deposit consists of a poorly exposed quartz vein in metafelsite or greenschist (meta-andesite) of the lower Paleozoic Spruce Creek sequence (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984, fig. K-2).
At about this location, Davis (1923, p. 132) described a foot-thick, 'rusty' quartz vein that contains galena and chalcopyrite, and pans free gold. At what may be the same site, Bundtzen, Smith, and Tosdal (1976) reported a N40E-trending, poorly-exposed zone containing quartz; and Thornsberry, McKee, and Salisbury (1984, v. 2, occurrence 87) mapped a N80E-striking vein that contains traces of gold and silver.
Geologic map unit (-150.699684158887, 63.5827996655741)
Mineral deposit model Polymetallic veins (Davis, 1923) or low-sulfide Au-quartz veins (Bundtzen, 1981; Thornsberry, McKee, and Salisbury, 1984) (Cox and Singer, 1986; models 22c and 36a).
Mineral deposit model number 22c or 36a
Age of mineralization The Lucky Jim vein described by Davis (1923) is probably Eocene (see record MM091).
Alteration of deposit Iron-oxide alteration.

Production and reserves

Workings or exploration The Lucky Jim vein was discovered during or before 1921 or before.
Indication of production None

Additional comments

The location of the Lucky Jim prospect described by Davis (1923) is uncertain. The area of the prospect is in Denali National Park and Preserve.

References

MRDS Number A011233

References

Reporters C.C. Hawley
Last report date 5/1/2001