Jumbo Gold Mine

Past Producer in Alaska, United States with commodities Gold, Lead, Zinc

Geologic information

Identification information

Deposit ID 10002354
MRDS ID A013272
Record type Site
Current site name Jumbo Gold Mine
Alternate or previous names Smith Prospects: Jumbo, Minnesota, Duluth Claims
Related records 10258801

Geographic coordinates

Geographic coordinates: -136.10702, 57.65332 (WGS84)
Elevation 3
Relative position 0.7 MI SW OF CHICHAGOF ON W SHORE OF KLAG BAY
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS B 929, PLATE 1; USGS MF-1476-B, LOC. 17; USGS MF-467, LOC. 32. LOCATION IS SHAFTS ON JUMBO CLAIM. MINNESOTA AND DULUTH CLAIMS LOCATED UP TO 0.4 MI. N 42 DEGREES W FROM SHAFTS. 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
Lead Tertiary
Zinc Tertiary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Pyrite Gangue
Quartz Gangue

Analytical data

Result SURFACE QUARTZ ASSAYED BETWEEN 0.019 OZ/TON AND 0.116 OZ/TON AU-USGS B 929, P. 127

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Sitka Graywacke
    Rock description Sitka Graywacke
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -136.10702, 57.65332

Ore body information

  • Strike VEIN-N 25 DEGREES W, FAULT-N 54 DEGREES W
    Dip VEIN-60 DEGREES SW, FAULT-62 DEGREES S
    Thickness 0.61M

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1909
Discoverer Louis H. Smith
Year of first production 1909
Year of last production 1921

Mining district

District name Chichagof

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Surface/Underground
    Length 502.92M
    Overall depth 121.92M

Comments on the workings information

  • 35 FT. TUNNEL AND 48 FT. INCLINED SHAFT AT ONE LOCATION; 400 FT. INCLINED SHAFT WITH 200 FT. AND 400 FT. LEVELS. 400 FT. LEVEL HAS 1,100 FT. DRIFT, DRIVEN NW, AND 230 FT. DRIFT DRIVEN SE, ALSO SOME SMALL CROSSCUTS. SEVERAL HUNDRED FT. OF SURFACE CUTS, PITS, TRENCHES.

Comments on development

  • CLAIMS STAKED IN 1909 BY LOUIS H. SMITH, SMALL PRODUCTION REPORTED IN 1921, EXTENSIVE UNDERGROUND DEVELOPMENTS MADE, AS WELL AS SURFACE TRENCHES AND PITS.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013272

Bibliographic references

  • Deposit

    USGS B 929, P. 126-128, PLATES 1, 3 (1941)

  • Deposit

    USGS OF 78-450, P. 64 (1978)

  • Deposit

    USGS MF-1476-B, P. 6, LOC. 17 (1982)

  • Deposit

    USGS MF-467, LOC. 32 (1972)

  • Other Database

    BAG-B-929-PL-1

General comments

Subject category Comment text
Deposit QUARTZ STRINGERS AND VEINS UP TO 2 FT. THICK EXPOSED FOR SEVERAL HUNDRED FT. IN CRUSHED ZONE IN GRAYWACKE. QUARTZ CONTAINS PYRITE, GALENA, SPHALERITE, AND FREE GOLD.
Deposit DETAILS OF EARLY PRODUCTION RATHER HAZY. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey