1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Pook

Prospect in Alaska, United States with commodities Silver, Gold, Mercury
Map
XML
JSON
KML
C
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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10308143
Record type Site
Current site name Pook

Geographic coordinates

Geographic coordinates: -160.62741, 55.19423 (WGS84)
Relative position This prospect is approximately 4,000 feet northwest of Apollo Mountain on Unga Island (Wilson and others, 1988, locality 28). The map site is at an elevation of about 750 feet, in the SE1/4 of sec. 35, T. 75 S., R. 75 W., of the Seward Meridian. The location is accurate to within 1,200 feet.

Site location context

Political divisions (FIPS codes)

Aleutians East(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Port Moller A-2(quadrangle 1:63,360 scale)

Unga Island(quadrangle 1:100,000 scale)

Port Moller(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Cold Bay(hydrologic unit)

Aleutian Islands(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Unga Corporation(ANCSA Village)

ANCSA Village NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Mercury Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) The only alteration reported is silicification.

Nearby scientific data

(1) Thi
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The Pook prospect is in rocks mapped as the late Eocene to early Oligocene Popof volcanic rocks (Wilson and others, 1995). It is a northeast-striking, gold-bearing pyritic quartz-calcite vein system 10 to 70 feet wide and 2,000 feet long (Trujillo and others, 1981). A trace of chalcopyrite occurs in some of the veins. Individual veins in the system are as much as15 feet thick. The mineralized zone occurs along a fault contact between a basalt flow and a sequence of pyroclastic rocks and andesite flows. The vein material is sheared and crushed and shows evidence of repeated movement, resulting in a complex structural pattern. Anomalous gold values occur throughout the entire length of the zone. The best surface grades are 0.098 ounce of gold per ton, 1.47 ounces of silver per ton, 210 ppm copper, 1,000 ppm lead, 130 ppm zinc, 300 ppm arsenic, and 0.15 ppm mercury (Trujillo and others, 1981). A single drill hole apparently missed this zone at depth but hit a deeper, 76-foot-thick zone. A 35-foot section of this deeper zone assayed 0.005 to 0.020 ounce of gold per ton and 0.02 to 0.06 ounce of silver per ton. In 1991 Battle Mountain Exploration Company collected 26 power auger, 19 rock, and 15 soil samples at the prospect in a 2,600- by 1,000-foot area. Eighty percent of these samples returned low-level gold values between 26 ppb and 100 ppb. One high grade vein sample assayed 0.13 ounce of gold per ton (Ellis and Randolph, 1991).
  • Age = Eocene or younger.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = In 1981 Resource Associates of Alaska mapped the prospect, collected about 300 samples, conducted magnetometer and EM surveys, and drilled one 365-foot diamond drill hole. The best metal values obtained from the prospect include 0.098 ounce of gold per ton, 1.47 ounces of silver per ton, 210 ppm copper, 1,000 ppm lead, 130 ppm zinc, 300 ppm arsenic, and 0.15 ppm mercury. Eighty percent of rock, soil, and power auger samples collected by Battle Mountain Exploration Company in 1991 contained gold values between 26 ppb and 100 ppb. The remainder lacked gold, except for one sample of Pook vein material, which assayed 0.13 ounce of gold per ton.

Reference information

Bibliographic references

  • Deposit

    Trujillo, R.S., Anderson, G., MacLeod, T., Hendrick, K., Farnham, S., Peterson, J., 1981. Exploration and evaluation of the Unga-Popof-Korovan Islands portion of lands leased from Aleut Native Corporation: Resource Associates of Alaska report, 70 p., 38 map sheets, various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Wilson, F.H., White, W.H., and DuBois, G.D., 1988, Brief descriptions of mines, prospects, and mineral occurrences in the Port Moller and Stepovak Bay quadrangles, Alaska Peninsula: U.S. Geological Survey Open-File Report 88-666, 128 p., scale 1:250,000.

  • Deposit

    Ellis, W.T., and Randolph, D., 1991, Unga project 1991 final report: Battle Mountain Exploration Company report, 36 p. 13 map sheets at various scales. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    Wilson, F.H., Detterman, R.L., Miller, J. W., and Case, J.E., 1995, Geologic map of the Port Moller, Stepovak Bay, and Simeonof Island quadrangles, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-2272, 1 map sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Trujillo and others, 1981

General comments

Subject category Comment text
Deposit Model Name = Epithermal gold vein
Deposit Other Comments = the prospect is located on land patented by, or interim-conveyed to, the Aleut Corporation.

Reporter information

Type Date Name Affiliation Comment
Reporter 10-JAN-01 S.H. Pilcher U.S. Geological Survey

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.