Unnamed Occurrence (ARDF - MH212; northeast of 'Miller Mine'), Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 20' 43'' North , 145° 42' 0'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of 2,700 feet at the north end of Rainbow Ridge about 1.1 miles northeast of the 'Miller Mine' on the Richardson Highway (Hanson, 1963, p. 71). It is near the foot of a steep canyon in the NE1/4NE1/4 section 19, T. 18 S., R. 11 E., Fairbanks Meridian. This location corresponds to locality S101 of table 2 in Nokleberg and others (1991) and to locality 16 of Cobb (1979 [OFR 79-238]).
Geology: At this locality disseminated pyrite and chalcopyrite occur in graywacke and conglomerate with pyrite and chalcopyrite (Hanson, 1963, p. 71). The mineralized rock is iron stained and is exposed over a few hundred square feet. Samples of the mineralized conglomerate assayed 0.12 ounce of gold per ton (Hanson, 1963). The host rocks are part of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991).
Workings: Samples of the mineralized conglomerate assayed 0.12 ounce of gold per ton (Hanson, 1963). The occurrence is on active claims of Northeast Exploration.
Age: Permian (?) or younger.
Alteration: The rocks are iron stained.
Commodities (Major) - Au, Cu
Development Status: None
Deposit Model: Polymetallic vein(s) (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.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | MH212 |
|---|
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