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Spruce Creek Placer

Past Producer in Alaska, United States with commodities Gold, Silver, Tin
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Mining district
  11. Land status
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10101030
MRDS ID A015551
Record type Site
Current site name Spruce Creek Placer
Related records 10111735

Geographic coordinates

Geographic coordinates: -155.44889, 64.1481 (WGS84)

Site location context

Political divisions (FIPS codes)

Yukon-Koyukuk(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ruby A-5(quadrangle 1:63,360 scale)

Ruby S(quadrangle 1:100,000 scale)

Ruby(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS MF-405, LOC. 28. STRIP MINE AND TAILINGS MARKED ON RUBY (A-5). WORKABLE PLACERS FROM BELOW THE MOUTH OF SCHIST CR. TO JUNCTION OF RUBY-POORMAN RD. 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
Tin Critical Tertiary

Materials information

Materials Type of material
Cassiterite Ore
Gold Ore

Analytical data

Result FINENESS 854 AU AND 140 AG. MINABLE GROUND RAN FROM $.75 PER FT2 OF BEDROCK TO RICH SPOTS FROM WHICH $12 PANS WERE REPORTED (AU AT $20.67 OZ).

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Clay, Mud
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Nearby scientific data

(1) -155.44889, 64.1481
ListMap

Economic information

Comments on the geologic information

  • STREAM FLOWS IN A BROAD VALLEY WITH A GENTLE GRADIENT, APPARENTLY THE SAME AS THAT OF THE BEDROCK CHANNEL. ; MAJOR.UNITS: BEDROCK IS MOSTLY SLATE, SCHIST, AND PHYLLITE, WITH SOME RHYOLITIC INTRUSIVES.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1913

Mining district

District name Ruby

Land status

Ownership category State

Comments on the workings information

  • GROUND IS GENERALLY FROZEN TO BEDROCK.

Comments on development

  • PROSPECTS REPORTED IN 1913; MINING UNTIL PROBABLY 1940'S; INACTIVE IN 1956 AND 1975. MINED BY DRIFTING.

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit GOLD FOUND IN GRAVEL CLOSE TO BEDROCK. PAY STREAK FOLLOWS CREEK AND IS 55-70 FT. DEEP; MINING FOR ABOUT 3 MI. ALONG VALLEY; GRAVEL 2-5 FT. THICK. CASSITERITE PRESENT.
Deposit STREAM GRADIENT APPROXIMATELY 50 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-JUL-1987 Powers, M.T. (Huber, D.F.) 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.