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Jensen Gold-Silver Mine

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

Identification information

Deposit ID 10002424
MRDS ID A013345
Record type Site
Current site name Jensen Gold-Silver Mine
Alternate or previous names Marty Group: Fairview Claim
Related records 10161011

Geographic coordinates

Geographic coordinates: -133.29804, 57.58975 (WGS84)
Elevation 777
Relative position 1.5 MI. E OF HEAD OF WINDHAM BAY
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS B 1525, FIGS. 31, 33 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
Lead Tertiary
Zinc Tertiary

Materials information

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

Analytical data

Result HIGHEST VALUE WAS 0.65 FT. VEIN SAMPLE ASSAYED AT 16.98 OZ/TON AU, 3.14 OZ/TON AG, 4000 PPM PB
Result AVERAGE ASSAY OF 68 FT. INTERVAL ALONG MAIN VEIN WAS 0.05 OZ/TON AU WITH 4 FT. STOPING WIDTH. USGS B 1525, P. 131, 132, 272, TABLE 17.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -133.29804, 57.58975
ListMap

Geologic structures

Type of structure Local
Structure description Foliation Of Schist Strikes N 50 Degrees W, Dips 70 Degrees Ne

Ore body information

  • Strike MAIN VEIN: N 55 DEGREES W; OTHER VEINS: N 45 DEGREES-60 DEGREES W
    Dip MAIN VEIN: 60 DEGREES NE; OTHER VEINS: 45 DEGREES-70 DEGREES E
  • Strike MAIN VEIN: N 55 DEGREES W; OTHER VEINS: N 45 DEGREES-60 DEGREES W
    Dip MAIN VEIN: 60 DEGREES NE; OTHER VEINS: 45 DEGREES-70 DEGREES E

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1927
Year of last production 1927

Mining district

District name Petersburg

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Underground
    Length 99.06M

Comments on the workings information

  • 50 FT. CROSSCUT AND 275 FT. DRIFT, PLUS STOPE. 4,500 FT. TRAM TO MILL. PORTALS TO ADIT PARTIALLY CAVED IN AS OF 1974.

Comments on development

  • 2 ADITS DRIVEN IN 1916 BY ALASKA PEERLESS MINING CO., 80 FT. ADIT DRIVEN BY R.V. ROWE IN 1922, MILL BUILT IN 1925, PROPERTY ACQUIRED BY JACOB MARTY MINES IN 1925, 275 FT. OF ADITS AND CROSSCUTS DRIVEN AND TRAM BUILT IN 1926. PRODUCTION 1927 ONLY.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A013345

Bibliographic references

  • Deposit

    USGS B 1525, P. 127, 131-32, 262, 272, FIGS. 31, 42, TABLES 14, 17, (1984)

  • Deposit

    USBM OFR 91-86, P. 44, 50, 53, 54, TABLE 2 (1986)

  • Other Database

    BAG-B-1525-FIGS-31, 33

General comments

Subject category Comment text
Deposit MAIN DRIFT DRIVEN ON SERIES OF QUARTZ VEINS 0.5-1.5 FT. THICK IN SCHIST, BEARING PYRITE, PYRRHOTITE, GALENA, SPHALERITE, AND OCCASIONALLY FREE GOLD. DIP OF VEINS OPPOSITE TO DIP OF SCHIST.
Deposit PART OF MARTY GROUP OF CLAIMS. MINE HAS BEEN ABANDONED FOR MANY YEARS. MAY HAVE BEEN SOME PRODUCTION AFTER 1927. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1987 Niles, L.P. (Huber, D.F.) U.S. Geological Survey