Unnamed Occurrence (ARDF - TL066), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TL066) | - not defined - |
| Yentna Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
62° 31' 33'' North , 152° 13' 48'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
202681
Long-form identifier:
mindat:1:2:202681:0
GUID (UUID V4):
b2070716-95e9-45ed-874b-76815ee08a27
This site is located within Denali National Park and Preserve.
Location: Reed and others (1978, locality 20) locate this occurrence in the southeast quarter of Section 10, T. 28 N., R. 16 W., of the Seward Meridian, approximately 3.5 miles southeast of Mt. Dall within Denali National Park and Preserve.
Geology: At this site Reed and others (1978) describe disseminated sulfide minerals (unidentified) within secondary hydrous iron- and manganese-oxide stained Mesozoic argillite and graywacke (KJs) cut by stringers of the Cascade pluton. The 64.6 m.y. Cascade pluton is one of the composite plutons (Tcp) mapped by Reed and Nelson (1980). They report copper and gold mineralization is indicated by stream sediment and pan concentrate samples from Cascade Creek, approximately one mile to the southeast from this site. Foley and others (1997) report mean values of 20 ppb gold, 1 ppb palladium, 42 ppb platinum, 139 ppm nickel, and 26 ppm copper from six rock samples of the Cascade pluton. Also see TL021.
Workings: Reconnaissance mapping, stream silt, pan concentrate and rock sampling by the U.S. Geological Survey (Reed and others, 1978; Reed and Nelson, 1980) are all that have been described here. The Cascade pluton is one of the composite plutons (Tcp) mapped by Reed and Nelson (1980). They report copper and gold mineralization is indicated by stream sediment and pan concentrate samples from Cascade Creek, approximately one mile to the southeast from this site. Foley and others (1997) report mean values of 20 ppb gold, 1 ppb palladium, 42 ppb platinum, 139 ppm nickel, and 26 ppm copper from six rock samples of the Cascade pluton.
Age: Late Cretaceous/early Tertiary; mineralization is interpreted to be linked to the Cascade pluton dated as 64.6 +/- 1.8 m.y. by K/Ar methods (Reed and Lanphere, 1972).
Commodities (Major) - Ag, Cu, Zn; (Minor) - Fe, Mn
Development Status: None
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | TL066 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
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.
References
