Unnamed Prospect (ARDF - SI007; southeast of mouth of Stag Bay), Chichagof Mining District (Chicagof Mining District), Hoonah-Angoon Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
57° 54' 32'' North , 136° 20' 24'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
202384
Long-form identifier:
mindat:1:2:202384:0
GUID (UUID V4):
596f6299-f6c9-4c98-b1d1-a65474138ad0
The prospect is in West Chichagof-Yakobi Wilderness.
Location: This prospect is on the northeast flank of Mount Hill, about 1.3 miles southeast of the mouth of Stag Bay. The prospect is at an elevation of about 500 feet, 0.4 mile east-southeast of the center of sec. 4, T. 46 S., R. 56 E. It is location P-37 of Bittenbender and others (1999), MAS no. 0021140088 (U.S. Bureau of Land Management, 2002), and is included in location 7 of Cobb (1972, 1978). The location is accurate within about 0.2 mile.
Geology: Johnson and Karl map two geologic units in the area of this prospect. One is the Freeburn assemblage, a collage of kilometer-scale, fault-bounded, lozenge-shaped blocks of Cretaceous and Cretaceous(?) metasedimentary and metavolcanic rocks. The other is Mesozoic or Paleozoic amphibolite, gneiss, schist, and marble. The contact between the units is the Border Ranges Fault, a northwest-striking, steeply-dipping or vertical regional fault that separates Cretaceous or younger rocks on the southwest from Mesozoic or Paleozoic rocks on the northeast. The prospect is on or near this fault. Bittenbender and others (1999), citing work by Asbury (1964) and Kimball (1982), describe the deposit as an iron-copper skarn in a fault near a diorite-gabbro contact with marble. Samples of the mineralized rock contained up to 51 percent iron, 0.93 percent titanium dioxide, and 100 parts per million copper. Workings included 3 trenches, one of which is caved.
Workings: Workings included three trenches, one of which is caved.
Alteration: Unspecified skarn minerals.
Commodities (Major) - Cu, Fe
Development Status: None
Deposit Model: Fe skarn (Cox and Singer, 1986; model 18d).
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
2 valid minerals.
Detailed Mineral List:
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Magnetite | Fe2+Fe23+O4 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
Link to USGS - Alaska: | SI007 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainDomain
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