Unnamed Occurrence (ARDF - TL022), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TL022) | - 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° 28' 58'' North , 152° 41' 38'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
202679
Long-form identifier:
mindat:1:2:202679:7
GUID (UUID V4):
907619c1-7be6-4c9c-a0f5-846150a7d7b5
This occurrence is within the Denali National Park and Preserve.
Location: Reed and others (1978, locality 16) show this occurrence 19.5 miles east-southeast from Shellabarger Pass, in the southwest quarter of Section 30, T. 28 N., R. 18 W., of the Seward Meridian. Located at about 4200 feet elevation on the east side of the Shadows Glacier the occurrence is within the Denali National Park and Preserve.
Geology: Mesozoic marine sedimentary rocks (KJs) exhibit calc-silicate (skarn) alteration and are cut by a quartz- tourmaline-wolframite-scheelite vein 10 to 20 centimeters wide; the vein contains trace gold (Reed and others, 1978). The occurrence is within the thermal aureole of the Tertiary Cathedral pluton (Tmc), a biotite- muscovite granite that is part of the 52.3 to 56.2 m.y. McKinley sequence (Reed and Nelson, 1980).
Workings: Reconnaissance mapping, prospecting, stream silt, and rock sampling are all that have been done here. The quartz-tourmaline-wolframite-scheelite vein, 10 to 20 centimeters wide, contains trace gold (Reed and others, 1978).
Age: Tertiary; mineralization is interpreted to be linked to the Tertiary Cathedral pluton (Tmc), a biotite- muscovite granite that is part of the 52.3 to 56.2 m.y. McKinley sequence (Reed and Lanphere, 1972; Reed and Nelson, 1980).
Alteration: Development of calc-silicate (skarn) mineral assemblage in country rocks (Reed and others, 1978).
Commodities (Major) - Au, W
Development Status: None.
Deposit Model: W veins (Cox and Singer, 1986; model 15a).
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:
| β Gold Formula: Au |
| β Quartz Formula: SiO2 |
| β Scheelite Formula: Ca(WO4) |
| β 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
| β 'Wolframite Group' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| β | 'Wolframite Group' | 4.DB.30 va | |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Scheelite | 7.GA.05 | Ca(WO4) |
| Unclassified | |||
| β | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
List of minerals for each chemical element
| B | Boron | |
|---|---|---|
| B | β Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | β Quartz | SiO2 |
| O | β Scheelite | Ca(WO4) |
| O | β Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| Ca | Calcium | |
| Ca | β Scheelite | Ca(WO4) |
| W | Tungsten | |
| W | β Scheelite | Ca(WO4) |
| Au | Gold | |
| Au | β Gold | Au |
Other Databases
| Link to USGS - Alaska: | TL022 |
|---|
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
