Unnamed Occurrence (ARDF - SR219; central Chenega Island), Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
60° 19' 11'' North , 148° 3' 43'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201726
Long-form identifier:
mindat:1:2:201726:9
GUID (UUID V4):
e6c6d388-36ea-49bc-8c2e-1782fc57e955
Location: The occurrence is located on the northeast side of Chenega Peak at an elevation of about 1,660 feet. It is in the SE1/4 section 28, T. 3 N., R. 8 E., of the Seward Meridian. This is location 221 of Tysdal (1978 [MF-880-A]) and location S-87 of Jansons and others (1984). This location is accurate to within a quarter of a mile.
Geology: The occurrence consists of greenstone with remnant pillow structures that is interbedded with shale. The greenstone contains quartz stringers, epidote blebs, and traces of pyrite. The bedrock strikes N5E and dips steeply to the west (Kurtak and Jeske, 1986). Bedrock in the area is Orca Group of early Teriary age (Nelson and others,1985). Two random chip samples of quartz-epodite-pyrite blebs contained as much as 2.3 ppm silver, 520 ppm chrome, 115 ppm nickel, and 1,350 ppm manganese (Kurtak and Jeske, 1986).
Workings: Two random chip samples were collected from greenstone with quartz-epodite blebs and stringers and a trace of pyrite, and from iron-stained greenstone with epidote. They contained as much as 2.3 ppm silver, 520 ppm chrome, 115 ppm nickel, and 1,350 ppm manganese (Kurtak and Jeske, 1986). Not workings or improvements are present.
Age: Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.
Commodities (Major) - Cu; (Minor) - Cr, Mn, Ni
Development Status: None
Deposit Model: Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
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
3 valid minerals.
Detailed Mineral List:
ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
ⓘ Pyrite Formula: FeS2 |
ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | 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) |
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 |
Al | Aluminium | |
Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | Silicon | |
Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Si | ⓘ Quartz | SiO2 |
S | Sulfur | |
S | ⓘ Pyrite | FeS2 |
Ca | Calcium | |
Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | Iron | |
Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
Fe | ⓘ Pyrite | FeS2 |
Other Databases
Link to USGS - Alaska: | SR219 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Yakutat-Malaspina DomainDomain
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