Iron Mask Prospect, Seward Mining District, Kenai Peninsula Borough, Alaska, USAi
Regional Level Types | |
---|---|
Iron Mask Prospect | Prospect |
Seward Mining District | Mining District |
Kenai Peninsula Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
59° 54' 25'' North , 149° 17' 20'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Seward | 2,790 (2017) | 23.6km |
Bear Creek | 1,956 (2017) | 29.2km |
Primrose | 111 (2006) | 52.4km |
Mindat Locality ID:
198164
Long-form identifier:
mindat:1:2:198164:6
GUID (UUID V4):
9087db77-4b9a-4286-ac2f-366de0874722
On the 1:250,000-scale map the island is called Fox Island while on the 1:63,000-scale map is Renard Island.
Location: The prospect is on the east shore of Resurrection Bay, opposite Renard Island (Fox Island) in the NW1/4 of section 21, T. 3 S., R. 1 E., of the Seward Meridian. A small adit has been driven above the high tide level in a brecciated metamorphosed basalt. The breccia as exposed is 12 feet thick and has been traced 100 feet or more along the shore. This is prospect number 78 of Martin and others (1915, p. 235) and location 108 of Tysdal (1978). This location is accurate to within a quarter of a mile.
Geology: The host rock is a Lower Cretaceous diabase (Tysdal and Case, 1979) that has been brecciated and recemented by quartz and sulfide mineralization. The breccia is composed of fine-grained, diabase fragments which range in size from less than a fourth of an inch to several inches in size. The matrix material is a greenish cement. The original breccia is probably a flow breccia mixed with tuffaceous material that has been slightly broken and rehealed with quartz, and pyrite with a little calcite and chalcopyrite (Martin and others, 1915). The breccia is about 12 feet wide at this location and an sample across this zone showed 1.1% copper (Grant and Higgins, 1909, p. 104-105).
Workings: A small adit above the high tide line assayed 1.1% copper (Grant and Higgins, 1909, p. 104-105).
Age: Probably Upper Cretaceous; massive sulfide.
Alteration: Silicification.
Reserves: None report.
Commodities (Major) - Cu, Zn
Development Status: No
Deposit Model: Cyprus massive sulfide (Cox and Singer, 1986; model 24a).
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
5 valid minerals.
Detailed Mineral List:
β Calcite Formula: CaCO3 |
β Chalcopyrite Formula: CuFeS2 |
β Pyrite Formula: FeS2 |
β Quartz Formula: SiO2 |
β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Sphalerite | 2.CB.05a | ZnS |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
C | Carbon | |
---|---|---|
C | β Calcite | CaCO3 |
O | Oxygen | |
O | β Calcite | CaCO3 |
O | β Quartz | SiO2 |
Si | Silicon | |
Si | β Quartz | SiO2 |
S | Sulfur | |
S | β Chalcopyrite | CuFeS2 |
S | β Pyrite | FeS2 |
S | β Sphalerite | ZnS |
Ca | Calcium | |
Ca | β Calcite | CaCO3 |
Fe | Iron | |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Pyrite | FeS2 |
Cu | Copper | |
Cu | β Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
Other Databases
Link to USGS - Alaska: | BS007 |
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