Unnamed Occurrence (ARDF - CR086), Cape Addington, Noyes Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Unnamed Occurrence (ARDF - CR086) | - not defined - |
Cape Addington | - not defined - |
Noyes Island | Island |
Ketchikan Mining District | Mining District |
Prince of Wales-Hyder Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
55° 27' 2'' North , 133° 48' 39'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
200646
Long-form identifier:
mindat:1:2:200646:1
GUID (UUID V4):
d7edf292-477c-48bc-956b-ac8d1f01ef8f
Location: This occurrence is in a cliff face about 1.0 mile north-northeast of Cape Addington at the north end of a rocky beach. It is about 0.2 mile south of the center of section 14, T. 74 S., R. 76 E.
Geology: This occurrence is at the contact between Silurian Heceta Limestone and a Cretaceous quartz monzonite and granodiorite pluton (Clark, 1970 [OF 420]; D.J. Grybeck, unpublished field notes and analyses, 1984). The pluton extends south to Cape Addington. Patches of calc-silicate gneiss and hornfels less than a few tens of feet thick mark the contact; locally there is quartz veining. The contact is also copper stained in places and there are disseminated and scattered small masses of sulfides, including chalcopyrite, sphalerite, galena, and pyrite. Almost all of the sulfides are within 10 feet of the contact and the mineralization is sparse. Selected samples contain up to several percent copper and zinc, and up to 50 parts per million silver.
Workings: Only limited surface sampling during geologic mapping.
Age: In the contact of a Cretaceous granitic pluton.
Alteration: Sparse skarn minerals at contact of granitic pluton and marble.
Commodities (Major) - Ag, Cu, Zn; (Minor) - Pb
Development Status: None
Deposit Model: Contact-metamorphic Ag-Cu-Zn deposit.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
ⓘ Galena Formula: PbS |
ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
ⓘ 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 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Unclassified | |||
ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
O | Oxygen | |
O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
O | ⓘ Quartz | SiO2 |
O | ⓘ Garnet Group | X3Z2(SiO4)3 |
Al | Aluminium | |
Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | Silicon | |
Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Galena | PbS |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Sphalerite | ZnS |
Ca | Calcium | |
Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | ⓘ Sphalerite | ZnS |
Pb | Lead | |
Pb | ⓘ Galena | PbS |
Other Databases
Link to USGS - Alaska: | CR086 |
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