| Deposit ID | 10000970 |
|---|---|
| MRDS ID | A011642 |
| Record type | Site |
| Current site name | West Twin Peak |
| Alternate or previous names | West Ridge, Eklutna Creek |
| Related records | 10233800 |
| Geographic coordinates: | -149.23265, 61.44955 (WGS84) |
|---|---|
| Relative position | On ridge 2 miles west of West Twin Peak summit, at 2,500 ft elevation. Accurate within 1,000 ft. Locality 41 of Cobb (1972) and locality 31 of MacKevett and Holloway (1977). |
Political divisions (FIPS codes)
Anchorage(Municipality)
Alaska(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Anchorage B-6(quadrangle 1:63,360 scale)
Anchorage SW(quadrangle 1:100,000 scale)
Anchorage(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Matanuska(hydrologic unit)
Knik Arm(hydrologic accounting unit)
South Central Alaska(hydrologic subregion)
Alaska(hydrologic region)
Federal lands
BLM(Federal land areas administered by BLM)
| Country | State |
|---|---|
| United States | Alaska |
| Commodity | Importance |
|---|---|
| Chromium Critical | Primary |
| Materials | Type of material |
|---|---|
| Chromite | Ore |
| Model code | 15 |
|---|---|
| USGS model code | 8a |
| Deposit model name | Podiform chromite (minor) |
| Mark3 model number | none |
| Model code | 23 |
| USGS model code | 9 |
| Deposit model name | Alaskan Cr-Pt (PGE) |
| Mark3 model number | 120 |
| (1) | -149.23265, 61.44955 |
|---|
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| District name | Anchorage |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | A011642 | |
| USGS | Alaska Resource Data File | ARDF | AN096 |
Brooks, A.H., 1918, Mineral resources of Alaska, 1916: U.S. Geological Survey Bulletin 662, 469 p.
Clark, S.H.B., and Bartsch, S.R., 1971, Reconnaissance geologic map and geochemical analyses of stream sediment and rock samples of the Anchorage B-6 quadrangle, Alaska: U.S. Geological Survey Open-File Report 475, 63 p., 2 sheets, scale 1:36,360.
Clark, S.H.B., 1972, Reconnaissance bedrock geologic map of the Chugach Mountains near Anchorage, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 350, 1 sheet, scale 1:250,000.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000.
Cobb, E.H., 1972, Metallic mineral resources map of the Anchorage quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-409, 1 sheet, scale 1:250,000.
MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.
Cobb, E.H., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials in the Anchorage quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-1095, 184 p.
| Subject category | Comment text |
|---|---|
| Deposit | Model Name = Podiform chromite or Alaskan PGE (Cox and Singer, 1986; models 8a or 9) |
| Deposit | Other Comments = Unconfirmed report of the presence of tin ore (Brooks, 1918). Some confusion exists about the name of this locality. Cobb (1972, loc. 41) refers to it as Eklutna Creek, while others refer to it as West Twin Peak. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 30-JUL-1998 | D.P. Bickerstaff | U.S. Geological Survey | |
| Reporter | 30-JUL-1998 | S.W. Huss | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.