Greenpoint Prospect, Hyder Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Greenpoint Prospect | Prospect |
| Hyder Mining District | Mining District |
| Prince of Wales-Hyder Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
56° 1' 30'' North , 130° 19' 19'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Stewart | 496 (2013) | 23.1km |
Mindat Locality ID:
197817
Long-form identifier:
mindat:1:2:197817:2
GUID (UUID V4):
78f4c10d-f237-4e45-8b02-f3e6521e0c82
The Greenpoint claims staked in 1970 (Berg and others, 1977, p. 94) extend beyond the Greenpoint prospect described in this record and cover the old Heckla prospect, which is described separately (BC024). Site is in Misty Fiords National Monument.
Location: The Greenpoint prospect is at an elevation of about 2700 feet on an untimbered point about 750 feet south of the confluence of Greenpoint and Through glaciers (Berg and others, 1977, p. 93-96; Elliott and Koch, 1981, p. 10, loc. 23). The location is probably accurate to within about a quarter of a mile. Also see Additional Comments field, below.
Geology: The country rocks in the area of the Greenpoint prospect are pelitic metasedimentary and andesitic metavolcanic rocks of the Jurassic or older Mesozoic Hazelton Group, and quartz monzonite and granodiorite of the Eocene Hyder Quartz Monzonite (Berg and others, 1977, p. 15-17, 22-23; Smith, 1977; Koch, 1996). The deposit (Berg and others, 1977, p. 93-96) consists of numerous quartz-calcite fissure veinlets up to 6 inches thick in multiple fracture sets that cut pelitic hornfels of the Hazelton Group. The veinlets contain up to 5% pyrite, lesser amounts of galena and molybdenite, and traces of chalcopyrite. Chip samples of the veinlets collected in 1972 by U.S. Bureau of Mines investigators contained as much as 30 ppm Ag. Average metal content was 2.4 ppm Ag, 400 ppm Pb, and 65 ppm Mo. One sample assayed 1100 ppm Zn.
Workings: Explored, probably in 1920's, by a small pit and open cut. Chip samples of veinlets collected in 1972 by the U. S. Bureau of Mines averaged 2.4 ppm Ag, 400 ppm Pb, and 65 ppm Mo. One sample contained 30 ppm Ag, and one assayed 1100 ppm Zn.
Commodities (Major) - Ag, Cu, Mo, Pb
Development Status: None
Deposit Model: Polymetallic veins
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
6 valid minerals.
Detailed Mineral List:
| β Calcite Formula: CaCO3 |
| β Chalcopyrite Formula: CuFeS2 |
| β Galena Formula: PbS |
| β Molybdenite Formula: MoS2 |
| β Pyrite Formula: FeS2 |
| β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Galena | 2.CD.10 | PbS |
| β | Molybdenite | 2.EA.30 | MoS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | β Calcite | CaCO3 |
| O | Oxygen | |
| O | β Calcite | CaCO3 |
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Galena | PbS |
| S | β Molybdenite | MoS2 |
| S | β Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Mo | Molybdenum | |
| Mo | β Molybdenite | MoS2 |
| Pb | Lead | |
| Pb | β Galena | PbS |
Other Databases
| Link to USGS - Alaska: | BC023 |
|---|
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References
