Fourth of July Creek Placer

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

Geologic information

Identification information

Deposit ID 10002778
MRDS ID A015241
Record type Site
Current site name Fourth of July Creek Placer
Related records 10135825

Geographic coordinates

Geographic coordinates: -141.98335, 65.1345 (WGS84)
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Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS-MF 390, LOC. 8. MINE AND TAILINGS MARKED ON CHARLEY RIVER (A-2, 3). COORDINATES GIVEN ARE FOR CENTER OF PLACER GROUND. 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
Platinum Secondary
Silver Secondary
Mercury Tertiary

Materials information

Materials Type of material
Cinnabar Ore
Gold Ore
Platinum Ore
Silver Ore

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone

Nearby scientific data

(1) -141.98335, 65.1345

Comments on the geologic information

  • VALLEY ASYMMETRIC, STEEPER WALL ON EAST SIDE. ; MAJOR.UNITS: BEDROCK IN UPPER VALLEY IS TERTIARY CONGLOMERATE AND INTERBEDDED SEDIMENTARY ROCKS. ; REG.COM: PROXIMATE SOURCE OF GOLD IS TERTIARY CONGLOMERATE. ULTIMATE SOURCE IS QUARTZ VEINS IN METAMORPHIC ROCKS. GOLD IN PLACERS DERIVED FROM CONGLOMERATE ERODED FROM OLDER METAMORPHIC ROCKS AT HEAD OF CREEK. PLACERS ONLY WHERE BEDROCK IS CONGLOMERATE. A LARGE PART OF GOLD SAID TO HAVE COME OUT OF UNION CREEK, A SMALL TRIBUTARY FROM THE SE.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1898
Year of first production 1902

Mining district

District name Eagle

Comments on the workings information

  • 2.5 MILE DITCH ON EAST SIDE OF VALLEY.

Comments on development

  • MINING REPORTED FROM 1902-1973. HYDRAULIC METHODS ONLY TYPE OF MINING MENTIONED. 29 FT. SHAFT SUNK TO PROSPECT BENCH.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A015241

Bibliographic references

  • Deposit

    USGS MF-390 (A-2, 3), LOC. 8.

  • Deposit

    USGS BULL. 897-C, P. 201-204

  • Deposit

    USGS BULL 917-D, P. 246-250, 257-259

General comments

Subject category Comment text
Deposit GOLD IN LOWER 2-3 FT. OF GRAVEL, ON BEDROCK, AND IN CRACKS IN TOP 2 FT. OF BEDROCK. BENCH DEPOSITS ON NW SIDE OF VALLEY ARE AURIFEROUS. BEDROCK OVERLAIN BY 6-15 FT. OF GRAVEL AND 2-7 FT. OF MUCK. GOLD CONTAINS ALLOYED PLATINUM AND SILVER.
Deposit STREAM GRADIENT ABOUT 125 FEET PER MILE. DISCOVERY CLAIM AT MOUTH OF CROWLEY CREEK. ; 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