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  3. Mineral Resource Data System (MRDS)

Twin Lakes West Zinc-Lead Occurrence

Occurrence in Alaska, United States with commodities Zinc, Lead, Copper
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10002128
MRDS ID A013026
Record type Site
Current site name Twin Lakes West Zinc-Lead Occurrence

Geographic coordinates

Geographic coordinates: -153.78741, 60.62833 (WGS84)
Location accuracy 2000(meters)

Site location context

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)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-1114-B, LOC. 11 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Zinc Critical Primary
Lead Secondary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Calcite Gangue
Chlorite Gangue
Epidote Gangue
Hematite Gangue
Pyrite Gangue

Alteration

  • (Local) Epidote And Chlorite, Silicification And Lesser Sericitization

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -153.78741, 60.62833
ListMap

Economic information

Comments on the geologic information

  • POSSIBLE VOLCANIC VENT CENTERS

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1976
Discoverer Research Associates Of Alaska, Inc.

Mining district

District name Bristol Bay

Comments on the workings information

  • NONE, OCCURRENCE ONLY

Reference information

Bibliographic references

  • Deposit

    USGS MF-1114-B, LOCATION 11 (1985)

  • Deposit

    RESOURCE ASSOCIATES OF ALASKA, INC., P. 33, 34 (1976)

  • Other Database

    BAG-MF-1114-B-11

General comments

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 VOLCANICS AND BRECCIAS
Deposit PORPHYRY TYPE MINERALIZATION RELATED TO A VOLCANIC BRECCIA DEPOSIT ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Reporter information

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.

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.