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Gonnason Prospect, Copper Mountain, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
Regional Level Types
Gonnason ProspectProspect
Copper MountainMountain
Prince of Wales IslandIsland
Ketchikan Mining DistrictMining District
Prince of Wales-Hyder Census AreaCensus Area
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
55° 14' 45'' North , 132° 37' 1'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Hydaburg391 (2017)14.0km
Hollis112 (2011)34.6km
Klawock765 (2017)45.5km
Thorne Bay483 (2017)49.5km
Mindat Locality ID:
197750
Long-form identifier:
mindat:1:2:197750:2
GUID (UUID V4):
c5cc1974-8ecd-44ab-9894-b9a1d865ace5


The Gonnason prospect is on a large block of patented claims. The land around it has been conveyed to the Sealaska Corporation or is under application for transfer to them.
Location: The Gonnason prospect is about 0.7 mile north-northwest of Copper Mountain and about 0.2 mile north-northwest of the southeast corner of section 27, T. 76 S., R. 84 E.
Geology: The Gonnason prospect was found in 1960 by the Hanna Mining Company (Hogg, 1965; Herreid and others, 1978). The deposit consists of a body of magnetite with chalcopyrite in skarn. As exposed on the surface, the body is about 150 by 225 feet in area and of unknown depth. A channel sample about 80 feet long across the deposit averaged 50.6 percent iron and 0.94 percent copper. Hogg (1965) estimated that the deposit is comparable in tonnage and grade to the Magnetite Cliff deposit (CR148). Although the body is in skarn, Kennedy (1953) and Herreid and others (1978) map the rocks in the area only as Cretaceous granodiorite. The deposit is probably in a small roof pendant of skarn in the granodiorite and is similar to the deposits at the nearby Jumbo Mine (CR150) and Magnetite Cliff (CR148).
Workings: Surface sampling and geophysical surveys.
Age: Iron-copper skarn probably related to a nearby Cretaceous granodiorite intrusion.
Alteration: Associated with magnetite-bearing skarn.
Reserves: Hogg (1965) estimated that the deposit is comparable in tonnage and grade to the Magnetite Cliff deposit (CR148).

Commodities (Major) - Cu, Fe
Development Status: None
Deposit Model: Iron-copper skarn (Cox and Singer, 1986; model 18d).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4

List of minerals for each chemical element

OOxygen
O MagnetiteFe2+Fe23+O4
SSulfur
S ChalcopyriteCuFeS2
FeIron
Fe ChalcopyriteCuFeS2
Fe MagnetiteFe2+Fe23+O4
CuCopper
Cu ChalcopyriteCuFeS2

Other Databases

Link to USGS - Alaska:CR149

Other Regions, Features and Areas containing this locality


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