Unnamed Occurrence (ARDF - MH119; ridge between the middle and east forks in Broxson Gulch), Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 20' 54'' North , 146° 4' 48'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of 4,900 feet on the ridge between the locally named middle and east forks of the stream(s) in Broxson Gulch (see figure 2 of Rose, 1965). The occurrence is at the southeast corner of section 18, T. 18 S., R. 9 E, Fairbanks Meridian. This location corresponds to locality 20 on figure 2 of Rose (1965).
Geology: The rock at this site appears to be sandstone or quartzite of the Slana Spur Formation of Late Paleozoic age faulted into Upper Triassic peridotite (Rose, 1965). The deposit consists of pyrrhotite disseminated in sandstone. A sample assayed 0.2 percent nickel, 0.18 ounce of silver per ton, and small amounts of copper and gold (Rose, 1965, p. 31). Stream-sediment sample 284 collected below the occurrence contained 420 parts per million nickel (Rose, 1965).
Workings: A sample contained 0.2 parts per million nickel. The occurrence is on active MAN Resources claims.
Alteration: The sandstone apparently is hornfelsed to quartzite.
Commodities (Major) - Ag, Ni; (Minor) - Au, Cu
Development Status: None
Deposit Model: Pyrrhotite-bearing replacement (?) of sandstone in fault contact with mafic-ultr
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Pyrrhotite Formula: Fe1-xS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
Other Databases
| Link to USGS - Alaska: | MH119 |
|---|
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