Unnamed Prospect (ARDF - MM070; upper East Fork of Glen Creek), Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Prospect (ARDF - MM070; upper East Fork of Glen Creek) | - not defined - |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
63° 34' 8'' North , 150° 43' 58'' West
Latitude & Longitude (decimal):
Köppen climate type:
The prospect is in Denali National Park and Preserve.
Location: This prospect is on the west side of the upper East Fork of Glen Creek at an elevation of about 3200 feet. It is about in the center of the N1/2 SW1/4 section 31, T. 15 S., R. 16 W., Fairbanks Meridian. The location is probably accurate within 500 feet. The prospect is occurrence 80 of Thornsberry, McKee, and Salisbury (1984).
Geology: The country rock in the area of this prospect is metafelsite of the Spruce Creek sequence. The metafelsite is cut by a dike or small plug of Tertiary dacite that has been sheared and brecciated. The shear zone strikes NE and is almost vertical (Thornsberry, McKee, and Salisbury, 1984, v. 2, occurrence 80). The deposit consists of mineralized brecciated dacite. The breccia is cemented by quartz containing as much as 35 percent pyrite, small amounts of arsenopyrite, and possibly some galena. The sulfides also replace the dacite. The deposit is nearly vertical. Selected samples contain as much as 4.2 ppm gold, 5.1 ppm silver, 0.031 percent lead, and 0.84 percent arsenic. The deposit has been explored by a short adit.
Workings: An adit was driven probably before 1920.
Age: The mineralization postdates the Eocene emplacement of the dacite. The deposit is assumed to be Eocene (see record MM091).
Alteration: Silicification; replacement of hostrock by sulfides.
Commodities (Major) - Ag, Au; (Minor) - As, Pb
Development Status: None
Deposit Model: Pyritic shear zone.
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
4 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| 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 | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MM070 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower 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.
