Minook Creek Placer

Past Producer in Alaska, United States with commodities Gold, Silver

Geologic information

Identification information

Deposit ID 10002766
MRDS ID A015224
Record type Site
Current site name Minook Creek Placer
Related records 10136281

Geographic coordinates

Geographic coordinates: -150.14335, 65.38435 (WGS84)
Location accuracy 1000(meters)
Relative position ABOUT 9 MILES SOUTH OF RAMPART
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-371, LOC. 45. COORDINATES GIVEN FOR CENTER OF PLACER GROUND BETWEEN RUBY AND SLATE CREEKS. 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

Materials information

Materials Type of material
Gold Ore
Silver Ore

Host and associated rocks

  • 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 Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -150.14335, 65.38435

Comments on the geologic information

  • VALLEY NARROW AND DEEPLY INCISED. VALLEY HAS SEVERAL TERRACES ON EAST SIDE AT ELEVATIONS 10, 90, 155, 190, 255, 480, AND 960 FT. ABOVE CREEK LEVEL, BETWEEN THE MOUTHS OF HUNTER AND LITTLE MINOOK CREEKS. SOME TERRACES EXTEND UP TRIBUTARY VALLEYS. TOP TERRACE CAPPED BY 100 FT. OF PLIOCENE (?) GRAVEL. ; MAJOR.UNITS: BEDROCK IS CLOSELY FOLDED MIDDLE PALEOZOIC SLATE, LIMESTONE, QUARTZITE, AND SCHIST; AND PERMIAN TO TRIASSIC DIABASE, SHALE, AND TUFF; TERTIARY CONTINENTAL ROCKS NEAR MOUTH. ; REG.COM: MOST OF GOLD CAME ORIGINALLY FROM BEDROCK SOURCES IN THE LOWER RATHER THAN THE UPPER PART OF ITS VALLEY, THEREFORE, IT IS IMPROBABLE THAT MUCH PLACER GOLD EXISTS ABOVE THE MOUTH OF SLATE CREEK. BELOW THE MOUTH OF SLATE CR. MINOOK CR. HAS RECEIVED GOLD BOTH FROM THE EROSION OF OLDER BENCH GRAVEL AND FROM BEDROCK SOURCES, BUT THE VALLEY IS WIDE AND THE PAY SCATTERED.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1893

Workings at the site

  • Type of workings Surface
    Area 2.4HA

Comments on development

  • PROBABLY PROSPECTED AS EARLY AS 1882; COARSE GOLD FOUND IN 1893. INTERMITTANT MINING FROM 1902-40 REPORTED. LARGE HYDRAULIC PLANT OPERATED, 1905. MINED ALSO BY OPEN-CUT. NO DREDGING.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015224

Bibliographic references

  • Deposit

    USGS MF-371 (B-1), LOC. 45

  • Deposit

    USGS BULL. 844-D, P. 174-77.

  • Deposit

    USGS BULL. 337, P. 65-72

  • Deposit

    USGS OF 85-213, P. 37

General comments

Subject category Comment text
Deposit TERRACE GRAVELS AURIFEROUS; GOLD RECONCENTRATED INTO RICH PLACERS ON SOME OF TRIBUTARIES, BUT PLACERS ON MAIN STREAM ARE TOO LOW GRADE TO SUPPORT SMALL SCALE MINING. MUCH OF MINING WAS BAR SNIPPING AND SMALL OPERATIONS IN RICHER SPOTS. GRAVEL GENERALLY 10-20 FT. THICK OVERLAIN BY A FEW FEET OF CARBONACEOUS SILT. NUGGETS OF NATIVE SILVER ACCOMPANY GOLD.
Deposit THE GRADIENT OF MINOOK CREEK FROM SLATE CR. TO THE YUKON RIVER IS ABOUT 40 FT TO THE MILE. DESCRIPTION FOR ENTIRE LENGTH OF MINOOK CR. FROM SLATE CR. TO THE YUKON RIVER. MOST OF REPORTED MINING PROBABLY WAS ON TRIBUTARIES. ; 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-MAY-1987 Powers, M.T. (Huber, D.F.) U.S. Geological Survey