Napoleon Creek Placer

Past Producer in Alaska, United States with commodity Gold

Geologic information

Identification information

Deposit ID 10002717
MRDS ID A015162
Record type Site
Current site name Napoleon Creek Placer
Related records 10160776

Geographic coordinates

Geographic coordinates: -141.73046, 64.10754 (WGS84)
Location accuracy 250(meters)
Relative position ABOUT 7 MILES ENE OF CHICKEN.
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-393, LOC. 58. LOWER 1.5 MILES OF NAPOLEON CREEK A WESTWARD FLOWING TRIBUTARY TO SO. FORK FORTYMILE RIVER. COORDINATES FOR MINED MARKED ON EAGLE (A-2) NEAR MOUTH. 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

Comments on the commodity information

  • SEE REF. 2, P. 184.

Materials information

Materials Type of material
Gold Ore

Analytical data

Result FINENESS REPORTED TO BE 860 PARTS AU PER THOUSAND, BUT NO ASSAY SHEETS WERE SEEN.

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Gravel
    Rock unit name Kenai
    Rock description Kenai
    Stratigraphic age (youngest) Eocene

Nearby scientific data

(1) -141.73046, 64.10754

Comments on the geologic information

  • AT MOUTH VALLEY IS 90 YARDS WIDE BETWEEN STEEP CONGLOMERATE BLUFFS. BEDROCK SURFACE VERY IRREGULAR. ; MAJOR.UNITS: BEDROCK IN LOWER (PAY) PART OF VALLEY IS COAL, CONGLOMERATE, AND SANDSTONE. FURTHER UPSTREAM BEDROCK IS MAFIC ROCKS, GREENSTONE, LIMESTONE, AND SCHIST CUT BY GRANITIC DIKES; AT HEADWATERS BEDROCK IS GRANITE.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1893
Year of first production 1898
Year of last production 1938

Mining district

District name Fortymile

Land status

Ownership category State

Comments on development

  • GOLD DISCOVERED IN 1893 AT MOUTH. MINED MAINLY BY HYDRAULIC METHODS FROM 1898-1938.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015162

Bibliographic references

  • Deposit

    USGS MF-393 (A-2), LOC. 58.

  • Deposit

    USGS BULL. 897-C, P. 183-185.

General comments

Subject category Comment text
Deposit GOLD MAINLY ON AND IN CRACKS IN BEDROCK IN STREAM CUT AND BENCH TERRACES ALONG THE NORTH WALL OF THE VALLEY. MAIN PAY ZONE AT MOUTH AND 1.5 MILES UPSTREAM. GRAVEL AND MUCK OVERBURDEN 8-18 FT. THICK.
Deposit STREAM GRADIENT ABOUT 150 FEET PER MILE. ; 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-APR-1987 Powers, M.T. (Huber, D.F.) U.S. Geological Survey