Johnson and Gouley; unnamed Occurrences, McLean Arm, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi

Regional Level Types
Johnson and Gouley; unnamed Occurrences	Group of Occurrences
McLean Arm	- not defined -
Prince of Wales Island	Island
Ketchikan Mining District	Mining District
Prince of Wales-Hyder Census Area	Census Area
Alaska	State
USA	Country

Location: The Johnson and Gouley prospect is reported to be about a mile south of the head of McLean Arm at an elevation of about 1,500 feet (Cobb, 1978) . Maas and others (1991) could not find the prospect, but they did locate two other mineral occurrences in the vicinity. The occurrences are at elevations of 1,450 and 1,480 feet, near the center of the E1/2 of section 2, T. 82 S., R. 89 E. Their location is accurate within 0.2 mile. The Johnson and Gouley prospect is often combined with the Polson and Ickis prospect (DE039), about a mile to the east.
Geology: Although Maas and others (1991) could not find the Johnson and Gouley prospect, which reportedly is near this site, they found two other mineral occurrences nearby. Those occurrences are described in this record. The rocks in the area consist of Silurian or Ordovician syenite and quartz monzonite (Gehrels, 1992). One occurrence is at at elevation of about 1,480 feet. It consists of silicified monzonite that contains clots of pyrite-bearing quartz and calcite. A selected sample contained 208 parts per billion (ppb) gold, 4.4 parts per million (ppm) silver, and 364 ppm molybdenum. The other occurrence is at an elevation of 1,450 feet. It is in monzonite and consists of a quartz-calcite vein up to 0.4 foot thick. The vein contains pyrite, chalcopyrite, and malachite and the monzonite in the wall rock is silicified. Two samples, 0.3 and 0.4 feet long, across the vein contained 1.25 and 7.54 percent copper, 49 and 52 ppb gold, and 17.5 and 46.4 ppm silver. Samples of silicified monzonite wall rock contained 635 to 932 ppm copper, 0.3 to 0.5 ppm silver, and 8 to 14 ppb gold.
Workings: Although a prospect is reported in this area, the only work that can be documented is the sampling of mineralization by government geologists.
Age: Silurian or Ordovician or younger.
Alteration: The monzonite wall rock of the vein is silicified.

Commodities (Major) - Ag, Au, Cu, Mo
Development Status: None
Deposit Model: Quartz-calcite vein with copper, silver, molybdenum, and gold.

Other Databases

Link to USGS - Alaska:	DE037

Other Regions, Features and Areas containing this locality

References