|Quadrangle map, 1:250,000-scale||CR|
|Quadrangle map, 1:63,360-scale||A-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Brooks (1902) and Wright and Wright (1908) describe the location and geology of the Salmon prospect differently. For this record, the location follows Wright and Wright (1908), who place the prospect about 0.2 mile northwest of the head of Dolomi Bay, on the south side of the creek that leads to Paul Lake. It is about 0.3 mile east-southeast of the center of section 6, T. 78 S., R. 89 E. Brooks' location is less than 0.1 mile to the north, on the north side of the creek.|
The only descriptions of the Salmon prospect are by Brooks (1902) and Wright and Wright (1908). Their descriptions differ significantly in detail and they may be describing different prospects, although both reports refer specifically to the Salmon prospect/claim.
As described by Brooks (1902), the workings on the Salmon claim are a small crosscut and pit in sheared limestone. The deposit consists of a quartz vein about 5 feet wide at the surface that narrows to about 1 foot at the bottom of the pit. The quartz contains native gold, pyrite, and galena. Samples averaged about $8 per ton in gold (at $20.67 per ounce). As described by Wright and Wright (1908), the deposit consists of a quartz breccia vein 5 to 15 feet wide that can be traced for about 300 feet in open cuts and a shallow pit. The vein strikes about N80W; it is much oxidized at the surface, but fresh samples contain native gold, pyrite, and chalcopyrite.The geology of the Dolomi area is dominated by an arcuate, generally north-trending, fault system and by a large dome centered over the eastern third of Paul Lake (Herreid, 1967). The Wales Group country rocks consist chiefly of several marble layers 200 to 1300 feet thick, interbedded with calcareous chlorite schist and marble.
|Geologic map unit||(-132.054610252227, 55.1343141742469)|
|Mineral deposit model||Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).|
|Mineral deposit model number||36a|
|Age of mineralization||Vein is younger than the Late Proterozoic or Cambrian host rocks.|
|Workings or exploration||The deposit has been explored by open cuts, at least one pit, and, according to one description, a short crosscut.|
|Indication of production||None|
|Production notes||None apparently.|
Brooks, A.H., 1902, Preliminary report on the Ketchikan mining district, Alaska, with an introductory sketch of the geology of southeastern Alaska: U.S. Geological Survey Professional Paper 1, 120 p.
Cobb, E. H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-869, 262 p.
Herreid, Gordon, 1967, Geology and mineral deposits of the Dolomi area, Prince of Wales Island, Alaska: Alaska Division of Mines and Minerals Geologic Report 27, 17 p.
|Reporters||D.J. Grybeck (Applied Geology)|
|Last report date||5/1/2004|