Unnamed Prospect (ARDF - IL040; at head of locally named Sargent Creek; possibly McNeil No. 7 claim), Redoubt Mining District, Kenai Peninsula Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
59° 8' 34'' North , 154° 39' 18'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Kokhanok | 170 (2015) | 33.7km |
Mindat Locality ID:
202194
Long-form identifier:
mindat:1:2:202194:5
GUID (UUID V4):
69181f95-9cef-4cb0-953a-f60061dd50d9
Location: This prospect is at an average elevation of about 2,050 feet at the head of locally-named Sargent Creek (Richter and Herreid,1965). The prospect is in the N1/2 NW1/4 sec. 15, T. 12 S., R. 32 W., Seward Meridian. It is locality 6 of Richter and Herreid. The location is accurate for the approximate center of this six-acre prospect area.
Geology: The mineral deposits at this prospect are magnetite-rich skarns (tactites) in locally calcic, intermediate to mafic volcanic rocks and subordinate sedimentary rocks of the Jurassic Talkeetna Formation (Richter and Herreid, 1965; Detterman and Reed, 1980). The prospect comprises ten exposed bodies of magnetite-quartz skarn in an area of about six acres (Richter and Herreid, 1965). The largest body is nearly pure magnetite and is about 75 feet long and 10 feet wide. The other bodies are smaller and contain as much as 50 percent quartz. A ground-based magnetic survey suggests that the masses are isolated pods, not connected to a large mass at depth (Richter and Herreid, 1965, p. 14). The prospect appears to be the one described by Jasper (1956, p. 9), who reported two magnetite-rich pods, one containing an estimated 10,000 tons, and the other 5,000 tons, of ore. Richter and Herreid (1965) estimated 100 tons per vertical foot in the largest exposed body.
Workings: Exploration includes detailed geologic mapping and a ground-based magnetic survey by Richter and Herreid, (1965). There are no reports of any workings.
Age: Probably Jurassic.
Alteration: Contact-metasomatic replacement of calcic volcanic and sedimentary(?) rocks by magnetite and quartz.
Reserves: Jasper (1956) estimated a total of 15,000 tons of magnetite ore in two bodies. Richter and Herreid (1965) estimated 100 tons per vertical foot in the largest exposed body.
Commodities (Major) - 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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Fe | Iron | |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
Other Databases
| Link to USGS - Alaska: | IL040 |
|---|
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References
