Mayfield Mine

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

Geologic information

Identification information

Deposit ID 10000798
MRDS ID A011443
Record type Site
Current site name Mayfield Mine
Alternate or previous names Alaska Mayfield
Related records 10137235

Geographic coordinates

Geographic coordinates: -146.8359, 61.15848 (WGS84)
Location accuracy 2000(meters)
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • LOCATION APPROXIMATED FROM USGS MF-438,LOC. 7 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
Copper Tertiary
Lead Tertiary
Zinc Tertiary

Comments on the commodity information

  • SOME SECONDARY FE AND AS MINERALS PRESENT ON WEATHERING SURFACES

Materials information

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

Analytical data

Result NO DATA

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Rock unit name Valdez Group
    Rock description Valdez Group;Valdez Group

Nearby scientific data

(1) -146.8359, 61.15848

Geologic structures

Type of structure Local
Structure description Host Rock Is Cut By Vertical Joints Running N20 To 30w

Ore body information

  • General form LENSES, VEINS, STRINGERS

Controls for ore emplacement

  • Fracture Control; One Ore Body At Junction Of Fault And Spur Vein On Joint Plane

Comments on the geologic information

  • HOST ROCK IS VALDEZ GROUP; CLOSELY FOLDED GRAYWACKE AND ARGILLITE WITH SCHISTOSITY OF N70 TO 80E STRIKE AND 50 TO 60N CLIP

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1911
Year of last production 1938

Mining district

District name Port Valdez

Land status

Ownership category National Forest

Workings at the site

  • Type of workings Surface/Underground
    Name of workings UNDERGROUND WORKINGS
    Length 182.88M

Comments on the workings information

  • POSSIBLY CONSIDERABLY MORE THAN 600 FT OF UNDERGROUND WORKINGS IN TWO ADITS WITH 65 FT VERTICAL SEPARATION; PRESENT CONDITION UNKNOWN

Comments on development

  • LOCATED 1911; INTERMITTENT DEVELOPMENT 1911-1938; PRODUCTION REPORTED IN 1936 AND 1938, BUT THERE MAY HAVE BEEN SOME EARLIER PRODUCTION ALSO

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A011443

Bibliographic references

  • Deposit

    USGS BULL 520,P. 125

  • Deposit

    USGS BULL 622,P. 53,185-186

  • Deposit

    USGS BULL 880-A,P. 24-25

  • Deposit

    USGS MF-438, LOC. 7

  • Deposit

    USGS OFR 80-892B; LOC. 4

  • Other Database

    BAG-OFR-80-892B-04

General comments

Subject category Comment text
Deposit POORLY DEFINED FISSURE TRENDING N70W CONTAINS QUARTZ-SULFIDE VEINS, LENSES AND STRINGERS CARRYING GOLD, PYRITE, CHALCOPYRITE, GALENA, SPHALERITE AND ARSENOPYRITE
Deposit SEE ALSO: NATIONAL PROSPECT ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1985 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 14-APR-1994 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.
Editor 14-APR-1995 Waller, Nichelle (Mosier, Dan) U.S. Geological Survey PUT DIMENSION DATA INTO THE WORKINGS FIELDS FROM THE COMMENTS FIELD.