| Deposit ID | 10002134 |
|---|---|
| MRDS ID | A013025 |
| Record type | Site |
| Current site name | Twin Lakes West |
| Geographic coordinates: | -153.83269, 60.67944 (WGS84) |
|---|---|
| Relative position | SEE LOCATION COMMENTS |
Political divisions (FIPS codes)
Lake and Peninsula(Borough)
Alaska(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Lake Clark C-3(quadrangle 1:63,360 scale)
Lake Clark NE(quadrangle 1:100,000 scale)
Lake Clark(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Mulchatna River(hydrologic unit)
Nushagak River(hydrologic accounting unit)
Southwest(hydrologic subregion)
Alaska(hydrologic region)
Federal lands
Lake Clark National Park(National Park)
National Park NPS(Type of land area)
NPS(Federal land areas administered by NPS)
| Country | State |
|---|---|
| United States | Alaska |
| Commodity | Importance |
|---|---|
| Zinc Critical | Primary |
| Lead | Secondary |
| Copper | Tertiary |
| Materials | Type of material |
|---|---|
| Chalcopyrite | Ore |
| Galena | Ore |
| Hematite | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Calcite | Gangue |
| Chlorite | Gangue |
| Epidote | Gangue |
| Host or associated | Host |
|---|---|
| Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite |
| (1) | -153.83269, 60.67944 |
|---|
| Development status | Occurrence |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Discovery year | 1976 |
| Discoverer | Research Associates Of Alaska, Inc. |
| District name | Bristol Bay |
|---|
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | A013025 | |
| USGS | Alaska Resource Data File | ARDF | LC017 | |
| USGS | Mineral Resources Data System | MRDS | A013026 |
Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: (Contract report for U.S. Bureau of Mines), 109 p.
Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska - Supplement to Open-File Report 76-485: U.S. Geological Survey Open-File Report 81-1343B, 20 p.
Nelson, W.H., King, H.D., Case, J.E., Tripp, R.B., Crim, W.D., and Cooley, E.F., 1985, Mineral resource map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-B, scale 1:250,000.
BAG-MF-1114-B-11
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.
Nelson, W.H., King, H.D., Case, J.E., Tripp, R.B., Crim, W.D., and Cooley, E.F., 1985, Mineral resource map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-B, 1 sheet, scale 1:250,000.
| Subject category | Comment text |
|---|---|
| Deposit | MINERALIZATION OCCURS AS FINE-GRAINED DISSEMINATIONS AND HAIRLINE FRACTURE FILLINGS OF PYRITE AND LESSER CHALCOPYRITE, SPHALERITE, AND GALENA IN SILICIFIED RHYOLITE AND RHYOLITE-DACITE VOLCANIC ROCKS AND BRECCIAS (NELSON AND OTHERS, 1983). RESOURCE ASSOCIATES OF ALASKA (1976) CONSIDERED THE SETTING AS A POSSIBLE VOLCANIC VENT CENTER. THESE ROCKS HAVE UNDERGONE EPIDOTE AND CHLORITE ALTERATION, SILICIFICATION, AND LESSER SERICITIZATION. THE VOLCANIC ROCKS HAVE POTASSIUM-ARGON AGES THAT RANGE FROM 56.2 TO 62.7 M.Y. (EAKINS AND OTHERS, 1978). |
| Deposit | SITE IS IN LAKE CLARK NATIONAL PARK AND PRESERVE. |
| Deposit | THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-MAR-1987 | Leonard, Kenneth R. (Huber, Donald F.) | U.S. Geological Survey | |
| Editor | 02-SEP-1994 | Mosier, Dan | U.S. Geological Survey | PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES. |
| Updater | 01-JUN-1998 | Miller, M.L. (Bickerstaff, Damon P.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
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