Boot Flap Prospect, Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
Regional Level Types | |
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Boot Flap Prospect | Prospect |
Delta River Mining District | Mining District |
Southeast Fairbanks Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 19' 22'' North , 146° 18' 54'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
196603
Long-form identifier:
mindat:1:2:196603:2
GUID (UUID V4):
c28b98ab-8f20-46a8-a8f4-9d7a312dd787
Location: The Boot Flap prospect is at an elevation of 5,100 feet three-quarters of a mile east of the toe of the Eureka Glacier. It is about one-half mile south of peak 6563, in the SE1/4SE1/4 section 25, T. 18 S., R. 7 E., Fairbanks Meridian.
Geology: The rocks at the Boot Flap prospect appear to be a sill-like body of Upper Triassic gabbro and serpentinized peridotite and dunite (Rose, 1966 [ADMM GR 20, figure 2]). The body is informally called the Eureka ultramafic complex, which occupies strands of the Broxson Gulch thrust fault (W.T. Ellis, unpublished data, 1996). At the prospect, coarse-grained disseminated sulfides, principally pyrrhotite, occur in olivine melagabbro. Sulfide abundance increases to a maximum of about 10 percent downward in the sill-like body, and small amounts of magnetite, chalcopyrite, and pentlandite accompany the pyrrhotite. Samples contain as much as 0.03 percent copper, 0.09 percent nickel, 20 parts per billion (ppb) palladium, and 20 ppb platinum (W.T. Ellis, unpublished data, 1996).
Workings: The prospect is on active Fort Knox Gold Resource claims.
Age: Late Triassic, the age of the host rock.
Alteration: All of the ultramafic rock units are moderately to strongly serpentinized.
Commodities (Major) - Cu, Ni, Pd, Pt
Development Status: None
Deposit Model: Ni-Cu-PGE in differentiated mafic-ultramafic sill.
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:
β Chalcopyrite Formula: CuFeS2 |
β Magnetite Formula: Fe2+Fe3+2O4 |
β Pentlandite Formula: (NixFey)Ξ£9S8 |
β Pyrrhotite Formula: Fe1-xS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Pentlandite | 2.BB.15 | (NixFey)Ξ£9S8 |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrrhotite | 2.CC.10 | Fe1-xS |
Group 4 - Oxides and Hydroxides | |||
β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | β Magnetite | Fe2+Fe23+O4 |
S | Sulfur | |
S | β Chalcopyrite | CuFeS2 |
S | β Pentlandite | (NixFey)Ξ£9S8 |
S | β Pyrrhotite | Fe1-xS |
Fe | Iron | |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Magnetite | Fe2+Fe23+O4 |
Fe | β Pentlandite | (NixFey)Ξ£9S8 |
Fe | β Pyrrhotite | Fe1-xS |
Ni | Nickel | |
Ni | β Pentlandite | (NixFey)Ξ£9S8 |
Cu | Copper | |
Cu | β Chalcopyrite | CuFeS2 |
Other Databases
Link to USGS - Alaska: | MH102 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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