Mikado Mine

Producer in Alaska, United States with commodities Gold, Silver, Zinc, Lead, Antimony

Geologic information

Identification information

Deposit ID 10107527
MRDS ID A012558
Record type Site
Current site name Mikado Mine
Alternate or previous names Carter, Crystal, Eclipse, Engineers Exploration Syndicate, Golden Eagle, Idaho-Alaska Corp., Little Mikado, Overlook, Tobin
Related records 10135873

Geographic coordinates

Geographic coordinates: -148.25329, 67.53973 (WGS84)
Relative position HEAD OF ST. MARY'S GULCH
(click for info)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • ADGGS GR 42, FIGURE 2; LOCATION IS GIVEN FOR MIKADO LODE; NUMEROUS CLAIMS AND QUARTZ VEINS IN IMMEDIATE VICINITY; MOST OR POSSIBLY ALL MINING ON THE MIKADO VEIN 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
Zinc Tertiary
Lead Tertiary
Antimony Tertiary

Comments on the commodity information

  • GEOCHEMICAL SAMPLES SHOW HIGH CONCENTRATIONS OF AG, AS, PB, SB AND ESPECIALLY ZN; CU CONTENT GENERALLY LOW

Materials information

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

Alteration

  • (Local) Oxidized To 75 Ft; Principal Oxidation Products: Scorodite And Limonite

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Rock unit name Mikado Phyllite;Mikado Phyllite
    Rock description Mikado Phyllite;Mikado Phyllite

Nearby scientific data

(1) -148.25329, 67.53973

Comments on the geologic information

  • GENERAL AREA IS UNDERLAIN BY DEVONIAN SCHIST AND PHYLLITE CUT BY GREENSTONE SILLS AND DIKES; THE AREA E OF CHANDALAR LAKE IS CUT BY A SERIES OF NW TRENDING FAULTS; THE CHANDALAR AREA IS PART OF A LARGE REGION THAT IS DOMINATED BY NE TRENDING FOLDS AND THRUST PLATES, LOCALLY INTRUDED BY NE TRENDING BODIES OF GRANITIC ROCK AND BORDERED ON THE S BY E-W TRENDING FOLDS AND A GRANITIC BATHOLITH ELONGATED E-W. MIKADO PHYLLITE, SUBUNIT OF DEV. SCHIST; PROMINENT INTERBED OF PHYLLITE IN QUARTZ-MUSCOVITE SCHIST

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1909
Year of last production 1982

Mining district

District name Chandalar

Comments on the production information

  • REPORT ON 1983 MINING ACTIVITY IN ALASKA STATES: AN ESTIMATED 10,000 OZ AU PRODUCED "DURING THE LAST SEVERAL YEARS"; ADGGS SR 33, P. 16

Comments on the reserve resource information

  • PROVEN RESERVES IN 1979: MORE THAN 30,000 TONS GRADING 1 OZ/TON AU, ADGGS REVIEW OF ALASKA'S MINERAL RESOURCES, 1981-82, P. 20.

Comments on the workings information

  • 60 M SHAFT, 140 M CROSSCUT AND OPEN CUTS, 1909-1913; WORKINGS CAVED BY 1923; MORE THAN 200 M ADDED UNDERGROUND AND SOME SURFACE TRENCHING IN 1959-1960; 260 M OF DRIFTING AND CROSSCUTTING DONE WITH OME ASSISTANCE IN 1962-63; UNKNOWN AMOUNT OF WORK DONE IN LATE 60'S, LATE 70'S AND EARLY 80'S; MILL REDESIGATED, 1981; 125 TPD

Comments on development

  • FIRST UNDERGROUND DEVELOPMENT, 1909-1913; MINE REOPENED BY LITTLE SQUAW MINING CO. IN 1959-1960; UNDERGROUND WORK IN 1962-1963 DONE WITH OFFICE OF MINERALS EXPLORATION (OME) ASSISTANCE; UP TO 100 TPD MILLED INTERMITTENTLY IN THE LATE 60'S TO THE EARLY 80'S; MILL REDESIGNED IN 1981 TO INCLUDE CYANIDE-LEACHING AND FLOTATION CIRCUIT, MILL CAPACITY INCREASED TO 125 TPD; MILL OPERATED FOR 38 DAYS IN 1982; WORK IN 1983 RESTRICTED TO UNDERGROUND DEVELOPMENT DRILLING AND DRIFTING; NO WORK IN 1984

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012558

Bibliographic references

  • Deposit

    USGS BULL 532, P. 112-115

  • Deposit

    USGS BULL 773, P. 262

  • Deposit

    ADGGS GR 42, P. 5, 19-21, FIG. 2

  • Deposit

    USGS PP 709, P. 3, 14-16

  • Deposit

    USGS OFR 77-166-C, P. 37, LOC. 45A

  • Deposit

    USGS MF-878-B, LOC. 47

  • Deposit

    USGS CIRC 758, P. 3

  • Deposit

    ADGGS, REVIEW OF ALASKA'S MINERAL RESOURCES, 1981-82, P. 19-20, 30

  • Deposit

    ADGGS SR 33, P. 11, 16, 23

  • Deposit

    ADGGS SR 38, P. 7, 23

  • Other Database

    BAG-MF-878B-47

General comments

Subject category Comment text
Deposit NW TRENDING SHEAR ZONE ABOUT 50 FT WIDE CONTAINS SUBPARALLEL, HIGHLY FAULTED AND BRECCIATED AURIFEROUS QUARTZ VEINS UP TO 2 M THICK EXPOSED FOR OVER 900 M ALONG MIKADO FAULT; MIKADO VEIN AVERAGES 6 FT IN THICKNESS OVER 500 FT STRIKE LENGTH; MOST VEINS DISCONTINUOUS, A FEW TENS 'OR HUNDREDS OF FT LONG; VEINS CARRY VISIBLE FREE GOLD AND LESS THAN 5% SULFIDES; SULFIDES PRESENT: PYRITE, ARSENOPYRITE, SPHALERITE, GALENA AND STIBNITE
Deposit SEE ALSO: LITTLE SQUAW, TOBIN CREEK ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-86 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 02-SEP-94 Mosier, Dan U.S. Geological Survey PARSED OUT HOST ROCK AND ASSOCIATED ROCK TYPES, AGES, UNIT NAMES, AND UNIT AGES.