Unnamed Occurrence (ARDF - MH211; northeast of 'Miller Mine'), Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 20' 50'' North , 145° 41' 49'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of 3,500 feet at the north end of Rainbow Ridge about 1.25 miles northeast of 'Miller Mine' on the Richardson Highway. It is at the northeast corner of section 19, T. 18 S., R. 11 E., Fairbanks Meridian. The occurrence corresponds to locality 1 in Hanson (1963), locality 15 in Cobb (1979 [OFR 79-238]), and locality S100 of table 2 in Nokleberg and others (1991).
Geology: This occurrence consists of disseminated to massive chalcopyrite and galena in a small swarm of quartz veins as much as 3 inches wide (Hanson, 1963). The veins cut sedimentary and volcanic rocks of the Slana Spur Formation of Pennsylvanian age, which is locally intruded by granodiorite and dacite (Nokleberg and others, 1991). Samples of veins assay 1.6 to 1.7 percent copper, 2.0 to 2.1 percent lead, a trace of gold, and 2.4 ounces of silver per ton (Hanson, 1963).
Workings: Samples of veins assay 1.6 to 1.7 percent copper, 2.0 to 2.1 percent lead, a trace of gold, and 2.4 ounces of silver per ton (Hanson, 1963). The occurrence is on active claims of Northeast Exploration.
Age: Permian(?) or younger.
Commodities (Major) - Ag, Cu, Pb; (Minor) - Au
Development Status: None
Deposit Model: Polymetallic veins (Cox and Singer, 1986; model 22c).
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 | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | 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 | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MH211 |
|---|
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