Marion Mine (Jack Wilcox Mine), Nutkwa Lagoon, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 8' 43'' North , 132° 28' 51'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
198749
Long-form identifier:
mindat:1:2:198749:5
GUID (UUID V4):
e36b108f-1a6d-4da6-9054-08fcf9d6da8e
Location: The Marion prospect is at an elevation of about 110 feet, 1.2 km (3,900 feet) NNE of Nutkwa Lagoon (coordinates of record), about 0.8 mile W of the mouth of the stream at the head of Nutkwa Lagoon. It is about 0.4 mile SE of the center of section 32, T77S, R86E.
Geology: By 1916, the Marion prospect had been explored by a 400-foot adit with a 50-foot winze about 190 feet from the portal (Chapin, 1916). Roehm (1939 [PE 119-18] ) called it the Jack Wilcox prospect, and it was restaked in 1944 (Twenhofel and others, 1949). Wolff and Heiner (1971) indicate that the property has produced about 50 ounces of gold, 3 ounces of silver, and 36 pounds of lead. The rocks in the vicinity are greenschist of the Wales Group of Late Proterozoic and Cambrian age. The adit follows a calcite-bearing quartz vein up to 6 feet thick that is along a shear zone that strikes N20-30W and dips 80W (Herreid and others, 1978). The vein contains small amounts of arsenopyrite, chalcopyrite, galena, pyrite, and sphalerite. Roehm (1939 [PE 119-18]) collected 21 samples across the mineralized zone that averaged 0.06 ounce of gold per ton, and 0.66 ounce of silver per ton; the highest value was 0.66 ounce of gold per ton. As described by Roehm, the mineralized zone is 3 to 12 feet wide and extends for 3,000 feet to an elevation of about 1,000 feet. Maas and others (1991) could not locate the workings under a landslide and recent logging. However, they identified several thin, mineralized fault zones on the surface nearby. A sample from a 4-inch quartz vein in the footwall of a 11-foot-wide fault zone contained 3,828 parts per million (ppm) Au, 12.6 ppm Ag, and 5,590 ppm Zn.
Workings: By 1916, the Marion prospect had been explored by a 400-foot adit with a 50-foot winze about 190 feet from the portal (Chapin, 1916). Roehm (1939 [PE 119-18] ) called it the Jack Wilcox prospect, and it was restaked in 1944 (Twenhofel and others, 1949).
Alteration: None specifically noted, but the mineralized quartz vein occurs along a shear zone.
Commodities (Major) - Ag, Au, Cu, Zn
Development Status: Yes
Deposit Model: Sulfide-bearing gold-quartz vein (Cox and Singer, 1986; model 36a).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
7 valid minerals.
Detailed Mineral List:
ⓘ Arsenopyrite Formula: FeAsS |
ⓘ Calcite Formula: CaCO3 |
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Galena Formula: PbS |
ⓘ Pyrite Formula: FeS2 |
ⓘ Quartz Formula: SiO2 |
ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Sphalerite | 2.CB.05a | ZnS |
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Galena | 2.CD.10 | PbS |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
C | Carbon | |
---|---|---|
C | ⓘ Calcite | CaCO3 |
O | Oxygen | |
O | ⓘ Calcite | CaCO3 |
O | ⓘ Quartz | SiO2 |
Si | Silicon | |
Si | ⓘ Quartz | SiO2 |
S | Sulfur | |
S | ⓘ Arsenopyrite | FeAsS |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Galena | PbS |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Sphalerite | ZnS |
Ca | Calcium | |
Ca | ⓘ Calcite | CaCO3 |
Fe | Iron | |
Fe | ⓘ Arsenopyrite | FeAsS |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | ⓘ Sphalerite | ZnS |
As | Arsenic | |
As | ⓘ Arsenopyrite | FeAsS |
Pb | Lead | |
Pb | ⓘ Galena | PbS |
Other Databases
Link to USGS - Alaska: | CR163 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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