Iron Mask; Mascot Occurrences, Hope Mining District, Kenai Peninsula Borough, Alaska, USAi
Regional Level Types | |
---|---|
Iron Mask; Mascot Occurrences | Group of Occurrences |
Hope Mining District | Mining District |
Kenai Peninsula Borough | Borough |
Alaska | State |
USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
60° 39' 53'' North , 149° 35' 23'' West
Latitude & Longitude (decimal):
Type:
Group of Occurrences
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Moose Pass | 219 (2014) | 23.0km |
Cooper Landing | 289 (2017) | 23.3km |
Hope | 192 (2017) | 28.2km |
Primrose | 111 (2006) | 35.0km |
Girdwood | 2,250 (2017) | 38.5km |
Mindat Locality ID:
198165
Long-form identifier:
mindat:1:2:198165:3
GUID (UUID V4):
fb543817-6748-4c5f-9eda-62a84820555f
Location: This map site is located in the SW1/4 section 26, T. 7 N., R. 2 W., of the Seward Meridian. It is situated at about 3,300 feet of elevation on the divide between Colorado and Fresno Creeks. This site represents two occurrences, the Iron Mask and the Mascot, which are mislocated on the 1951 Seward C-7 topographic map. This location is accurate to within a quarter of a mile. This is location 21 of Cobb and Richter (1972), locations 41 and 42 of Tysdal (1978 (MF-880-A)), location 29 of MacKevett and Holloway (1977), and location S-263 of Jansons and others (1984).
Geology: This occurrence consists of two dikes, the Mascot and Iron Mask (Martin and others, 1915). The deposits in both dikes are auriferous, sulfide-bearing, quartz-calcite veins similar to those at the Gilpatrick Dike mine (SR136). The Mascot dike crops out at the head of the creek on a ridge between Colorado and Fox Creeks. This dike strikes north, dips vertically, and is traceable for several hundred feet. At the discovery monument, the dike is 40 inches wide; 3 feet to the east is a smaller dike that ranges from 3 inches to 1 foot wide (Martin and others, 1915). On the spur to the north, the main dike has split into six distinct stringers. The Iron Mask dike crops out on the Colorado Creek slope between the Mascot dike and the Gilpatrick dike. It is 4 feet wide at the discovery monument. The mineralization of both dikes is similar to that in the Gilpatrick dike. The quartz-calcite veins heal fractures in the felsic dikes and contain gold, arsenopyrite, galena, sphalerite and possibly chalcopyrite. The dikes are probably Eocene; the country rock is sedimentary strata of the Valdez Group of Late Cretaceous age (Tysdal, 1978 [MF-880-A]).
Workings: There are mining claim discovery monuments on both dikes (Martin and others, 1915), but no workings are reported. The U.S. Bureau of Mines searched for the occurrences in 1980 but did not locate them (Hoekzema and Sherman, 1983).
Age: Eocene or younger; the dikes are probably Eocene in age.
Commodities (Major) - Au; (Minor) - Cu?, Pb, Zn
Development Status: None
Deposit Model: Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
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
7 valid minerals.
Detailed Mineral List:
β Arsenopyrite Formula: FeAsS |
β Calcite Formula: CaCO3 |
β Chalcopyrite Formula: CuFeS2 |
β Galena Formula: PbS |
β Gold Formula: Au |
β Quartz Formula: SiO2 |
β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
β | Sphalerite | 2.CB.05a | ZnS |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Galena | 2.CD.10 | PbS |
β | Arsenopyrite | 2.EB.20 | FeAsS |
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 Arsenopyrite | FeAsS |
S | β Chalcopyrite | CuFeS2 |
S | β Galena | PbS |
S | β Sphalerite | ZnS |
Ca | Calcium | |
Ca | β Calcite | CaCO3 |
Fe | Iron | |
Fe | β Arsenopyrite | FeAsS |
Fe | β Chalcopyrite | CuFeS2 |
Cu | Copper | |
Cu | β Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
As | Arsenic | |
As | β Arsenopyrite | FeAsS |
Au | Gold | |
Au | β Gold | Au |
Pb | Lead | |
Pb | β Galena | PbS |
Other Databases
Link to USGS - Alaska: | SR134 |
---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainDomain
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.