Little Minook Creek Placer

Producer in Alaska, United States with commodities Gold, Silver, Copper, Chromium, Lead, Tungsten, Manganese

Geologic information

Identification information

Deposit ID 10002769
MRDS ID A015229
Record type Site
Current site name Little Minook Creek Placer
Related records 10281903

Geographic coordinates

Geographic coordinates: -150.03697, 65.45853 (WGS84)
Location accuracy 250(meters)
Relative position ABOUT 5 MILES SE OF RAMPART
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-371, LOC. 50. COORDINATES GIVEN FOR CENTER OF PLACER MINING, ABOUT 2 MILES UP LITTLE MINOOK CREEK. LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Tertiary
Chromium Tertiary
Lead Tertiary
Tungsten Tertiary
Manganese Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Argentite Gangue
Barite Gangue
Copper Gangue
Garnet Gangue
Hematite Gangue
Ilmenite Gangue
Magnetite Gangue
Picotite Gangue
Pyrite Gangue
Sphene Gangue
Tetradymite Gangue
Zircon Gangue
Chromite Unknown
Galena Unknown
Scheelite Unknown
Silver Unknown

Analytical data

Result ASSAYS SHOW FINENESS ABOUT 920 AU AND 75 AG
Result 13 GLM3 AU, 1.1 GLM3 AG.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel

Nearby scientific data

(1) -150.03697, 65.45853

Comments on the geologic information

  • CREEK CUTS AURIFEROUS GRAVEL BENCHES (CALIFORNIA AND IDAHO BARS, SEE TANANA (B-1) EAST OF MINOOK CREEK. VALLEY IS STRAIGHT, V-SHAPED, AND CUTS 500-700 FT. BELOW SURFACE OF BENCH. ; MAJOR.UNITS: BEDROCK IS PERM-TRI SLATE, SHALE, LIMESTONE, CHERT, DIABASE, AND GREENSTONE. ROCKS JOINTED AND SHEARED; MINERALIZED WITH PYRITE AND CHALCOPYRITE; AND ARE CUT BY MANY QUARTZ-CARBONATE AND QUARTZ VEINS, AT LEAST ONE OF WHICH IS AURIFEROUS. ; REG.COM: GOLD IN PLACERS LARGELY RECONCENTRATED FROM BENCH GRAVELS.

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1893
Discoverer John Minook
Year of first production 1896

Workings at the site

  • Type of workings Surface/Underground
    Area 12HA

Comments on development

  • NEARLY ALL MINING BY DRIFTING, GROUNDSLUICING, AND SHOVELING IN. MINED IN 1975 BY BULLDOZER.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015229

Bibliographic references

  • Deposit

    USGS MF-371 (B-1), LOC. 50

  • Deposit

    USGS BULL. 844-D, P. 181-183.

  • Deposit

    USGS BULL. 337, P. 75-77

  • Deposit

    USGS OF 85-213, P. 32-33.

General comments

Subject category Comment text
Deposit STREAM GRADIENT ABOUT 150 FT. PER MILE. DISCOVERY CLAIM 7,000 FT. ABOVE MOUTH. WATER SUPPLY LOW; DRAINAGE BASIN LESS THAN 6 SQ. MILES. ; 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.
Deposit GOLD IN BASAL GRAVEL AND IN UPPER 1-2 FT. OF BEDROCK. ALL PRODUCTIVE PLACERS IN THE PRESENT CREEK GRAVELS; NO BENCH PLACERS GOLD IN LOWER 3 MILES OF CREEK; PAY STREAK UP TO 200 FT. WIDE AND 6 FT. THICK. GRAVEL 3-12 FT. THICK OVERLAIN BY 3-16 FT. OF MUCK.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Powers, M.T. (Huber, D.F.) U.S. Geological Survey