Prospects, Inactive

Commodities and mineralogy

Main commodities Ag; Cu; Pb
Ore minerals chalcopyrite; galena; gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale C-3
Latitude 55.53364
Longitude -132.67693
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Buckhorn prospect is at an elevation of about 3,000 feet about 0.3 mile north of Granite Mountain and 0.5 mile south of the center of section 17, T. 73 S., R. 84 E. The location is accurate.

Geologic setting

Geologic description

The rocks in the vicinity of the Buckhorn prospect are part of a large granodiorite-quartz diorite stock (Sainsbury, 1961; Eberlein and others, 1983; Brew, 1996). Early workers considered it to be Mesozoic or Cretaceous, but recent radiometric dating indicates that it is Devonian (S.M. Karl, oral communication, 2003). Wright and Wright (1908) described the Buckhorn prospect as 9 claims explored by open cuts and several tunnels. A quartz vein about 15 inches wide that strikes N5W and dips 45NE can be traced for several miles. The vein has free gold and sulfides. The sulfides are unspecified but the vein reportedly is similar to quartz veins at the Flagstaff Mine (CR043) that contain chalcopyrite, galena, and pyrite. Maas and others (1991) found a trench and caved adit. A 1-foot sample across a quartz vein in the trench had negligible metal values. A sample of quartz with pyrite from the dump of the adit contained 2.2 parts per million (ppm) gold and 15.7 ppm silver.
Geologic map unit (-132.678579688625, 55.5332800445149)
Mineral deposit model Gold-quartz vein (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a
Age of mineralization Unknown, other than that the vein is in Devonian granitic rocks.

Production and reserves

Workings or exploration The workings consist of a trench and a caved adit.
Indication of production None

Additional comments

This prospect is in the Karta River Wilderness Area, which is closed to exploration and mining.


MRDS Number A010043


Reporters D.J. Grybeck (Applied Geology)
Last report date 5/1/2004