Unnamed Occurrence (ARDF - MH231; south-southeast of Rainbow Mountain), Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 17' 7'' North , 145° 36' 32'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of 5,800 feet on the crest of Rainbow Ridge, 1.8 miles south-southeast of Rainbow Mountain. It is at the center of section 10, T. 19 S., R. 11 E., Fairbanks Meridian. The occurrence is described by Hanson (1963, locality 8), and it corresponds to locality 23 in Cobb (1979 [OFR 79-238]) and locality S113 in table 2 of Nokelberg and others (1991). It is a quarter-mile southeast of MH230.
Geology: This occurrence consists of two quartz veins as much as 2 feet thick and several smaller veins that contain chalcopyrite, galena, pyrite, and traces of gold and silver (Hanson, 1963). The veins strike N5W, dip 83W, cut andesite to dacite flow breccia, and are truncated on the north by a thrust fault. The flow breccias are part of the Tetelna Volcanics of Pennsylvanian age (Nokleberg and others, 1991). Samples of the mineralized veins assayed 0.3 to 0.4 percent copper, 0.5 to 0.6 percent lead, and a trace each of gold and silver (Hanson, 1963).
Workings: Samples of the mineralized veins assayed 0.3 to 0.4 percent copper, 0.5 to 0.6 percent lead, and a trace each of gold and silver (Hanson, 1963).
Age: Pennsylvanian or younger.
Commodities (Major) - Cu, Pb; (Minor) - Ag, 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
4 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
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 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MH231 |
|---|
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