Unnamed Occurrences (ARDF - CV059; below McCune/Heney Glaciers), Copper River Mining District, Valdez-Cordova Census Area, Alaska, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
60° 55' 12'' North , 144° 45' 0'' West
Latitude & Longitude (decimal):
Köppen climate type:
Chugach Alaska Corporation, Anchorage, Alaska has control of these lands.
Location: This site includes a placer occurrence and a lode occurrence. The placer occurrence includes the drainage below McCune Glacier and the southern outwash area of Heney Glacier. The placer covers an area of about 3 square miles. The map site is at about the midpoint of the placer, in the NE1/4 sec. 18, T. 11 S., R. 4 E., of the Copper River Meridian; the location is accurate to within 2000 ft. This site corresponds to loc. P-5 in Jansons and others (1984), which presumably represents both the placer and the lode occurrences.
Geology: The placer occurrence consists of small amounts of gold in alluvial and colluvial gravels derived from underlying metasedimentary rocks of the Upper Cretaceous Valdez Group (Nelson and others, 1985), and from the dunes near the terminus of Heney Glacier (Kodosky and Teller, 1989). A 0.1- cubic-yard sample assayed 0.0006 oz. Au/cubic yard (Jansons and others, 1984). In addition to the placer occurrence, Jansons and others (1984) describe a shear zone in Valdez Group metasedimentary and metavolcanic rocks in this area that contains galena and pyrrhotite. Analysis of a sample from the shear zone contained 0.14% Pb.
Workings: Site was sampled as part of a U.S. Bureau of Mines and U.S.G.S. mineral resource assessment of the Chugach National Forest (Jansons and others, 1984; Nelson and others, 1984). The area near the terminus of Heney Glacier was examined by industry in 1988 for placer gold (Kodosky and Teller, 1989).
Age: Placer Au is Holocene. Sulfide mineralization is Late Cretaceous or younger, based on the age of the host rocks.
Commodities (Major) - Au, Pb
Development Status: None
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a) and Cyprus massive sulfide (Cox and
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | CV059 |
|---|
Other Regions, Features and Areas containing this locality
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
