Rex prospect (Idela prospect), Green Monster Mountain, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 14' 17'' North , 132° 31' 28'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hydaburg | 391 (2017) | 19.5km |
| Hollis | 112 (2011) | 36.1km |
| Thorne Bay | 483 (2017) | 50.0km |
Mindat Locality ID:
199673
Long-form identifier:
mindat:1:2:199673:2
GUID (UUID V4):
c2d26544-17ad-419b-af92-e05396fbc898
Location: A Ag-Cu-Zn-Pb occurrence/prospect located 0.1 mile N of the center sec. 32, T76S, R85E, at an elevation of about 1,900 feet, about 0.5 mile SE of the top of Green Monster Mountain. The prospect is on a large block of (14?) patented claims that extends northwest to the Green Monster Mine (CR153). MRDS database stated accuracy for this location is 1,000 meters. This locality is probably the same as Summit Lake A and Summit Lake B occurrences in the Alaska Division of Geological and Geophysical Surveys (ADGGS) Geologic Report 48.
Geology: The deposit (Deposit Model: Copper skarn (Cox and Singer, 1986) model: 18b), hosted in limestone and consists of mineralized zones along faults in garnet-epidote-diopside skarn. The zone is several hundred feet long. The skarn is developed at the contact between Cretaceous granodiorite and Late Proterozoic or Cambrian marble of the Wales Group. The mineralized zones contain disseminations and irregular masses of magnetite, chalcopyrite, and sphalerite. Associated rocks include diorite. Local rocks include intermediate granitic rocks, mostly quartz diorite and tonalite, magmatic garnet and epidote 85-110 Ma.
Age: Probably Cretaceous.
Workings: several short adits and surface workings. This prospect consists of three short caved adits and some pits and trenches that probably date from before WWI.
Analysis test results: One high-grade sample contained 16.0% Cu, 2.0% Zn, 175 parts per million Pb, and 5.1 ounces of Ag/ton.
Production: There is no record of production.
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
5 valid minerals.
Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| β Chalcopyrite Formula: CuFeS2 |
| β Diopside Formula: CaMgSi2O6 |
| β Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| β 'Garnet Group' Formula: X3Z2(SiO4)3 |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Sphalerite | 2.CB.05a | ZnS |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 9 - Silicates | |||
| β | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| β | Diopside | 9.DA.15 | CaMgSi2O6 |
| Unclassified | |||
| β | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | β Diopside | CaMgSi2O6 |
| O | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Garnet Group | X3Z2(SiO4)3 |
| Mg | Magnesium | |
| Mg | β Diopside | CaMgSi2O6 |
| Al | Aluminium | |
| Al | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | β Diopside | CaMgSi2O6 |
| Si | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | β Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | β Diopside | CaMgSi2O6 |
| Ca | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | β Sphalerite | ZnS |
Other Databases
| Link to USGS - Alaska: | CR154 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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References
