1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Berkshire Mine

Past Producer in Iron county in Michigan, United States with commodity Iron
Map
XML
JSON
KML
B
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Production statistics
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10079420
MRDS ID W028953
Record type Site
Current site name Berkshire Mine

Comments on the site names

  • AS OF 1962 BECAME PART OF BUCK GROUP

Geographic coordinates

Geographic coordinates: -88.61588, 46.06417 (WGS84)

Site location context

Political divisions (FIPS codes)

Iron(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gaastra(quadrangle 1:24,000 scale)

Iron River(quadrangle 1:100,000 scale)

Iron River(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Brule(hydrologic unit)

Northwestern Lake Michigan(hydrologic accounting unit)

Northwestern Lake Michigan(hydrologic subregion)

Great Lakes(hydrologic region)

Geographic areas

Country State County
United States Michigan Iron

Public Land Survey System information

Meridian Township Range Section Fraction State
Michigan 042N 034W 6 NW OF SW Michigan

Comments on the location information

  • CENTERED BETWEEN TWO SHAFTS IN NW OF SW OF SECTION 6.

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Hematite Ore
Goethite Ore
Chert Gangue
Pyrite Gangue
Siderite Gangue
Stilpnomelane Gangue
Chlorite Gangue
Mica Gangue

Alteration

  • (Local) Chert and siderite to hematite and goethite in oxidation zones.

Mineral occurrence model information

Model code 241
USGS model code 34a
Deposit model name Superior Fe (BC name is Lake Superior & Rapitan types iron-formation)

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Iron Formation
    Stratigraphic age (youngest) Paleoproterozoic

Nearby scientific data

(1) -88.61588, 46.06417
ListMap

Economic information

Controls for ore emplacement

  • Stratigraphically controlled

Comments on the geologic information

  • WELL BEDDED CHERT AND SIDERITE IRON FORMATION.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1908
Year of last production 1943

Mining district

District name Menominee Range

Land status

Ownership category Private

Production statistics

  • Year 1950
    Period 1908-1950
    Material ore Fe
    Ore mined 4257040mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Fe Iron Iron 50wt-pct

Comments on the production information

  • ORE IS SOFT, RED-BROWN, HIGH PHOSPHORUS, NON-BESSEMER HEMATITE AND IS CRUSHED. GRADE GIVEN IS AVERAGE OF PRODUCTION ANALYSIS FOR 1910, 1914, 1916, 1919, 1922, 1926 AND 1929. INCLUDES CORRY '40' SHIPMENTS. OPERATION PAST 1950 IS RECORDED IN BUCK MINE REPORT AS GROUP OPERATION.

Comments on the reserve resource information

  • REMAINING IRON FORMATION IS NOT COMMERCIALLY VIABLE.

Comments on the workings information

  • UNDERGROUND TOP SLICING AND SUB-LEVEL CAVING METHOD WITH 4 SHAFTS & 12 MAIN HAULAGE LEVELS

Comments on development

  • BRULE MINING CO, VERONA MINING CO., YOUNGSTOWN MINES CO., PICKANDS AND MATHERS

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit OPENED 1908, SHIPPED EVERY YEAR THROUGH 1950 EXCEPT 1913, 1941-1942. SHIPPED FROM STOCKPILE 1936-1937. PART OF BUCK GROUP OF MINES. AFTER 1916, BUT PRIOR TO 1934, BERKSHIRE INCLUDED COTTRELL MINE (SEE SEPARATE REPORT, THIS FILE), PREVIOUSLY OPERATED BY THE BRULE MINING CO. (OGLEBAY, NORTON AND CO., AGENT). THE CORRY '40' (SEE SEPARATE REPORT, THIS FILE), WAS OPERATED BY BRUCE THROUGH THE BERKSHIRE SHAFT. BERKSHIRE LATER OPERATED BY YOUNGSTOWN MINES CORP. AND SUBSEQUENTLY BY THE VERONA MINING CO. WORKED BY TOP-SLICING AND SUB-LEVEL CAVING, UNDERGROUND. BUCK GROUP SHIPPED THROUGH 1962, SEE BUCK MINE REPORT OPENED 1908, SHIPPED EVERY YEAR THROUGH 1950 EXCEPT 1913, 1941-1942. SHIPPED FROM STOCKPILE 1936-1937. PART OF BUCK GROUP OF MINES. AFTER 1916, BUT PRIOR TO 1934, BERKSHIRE INCLUDED COTTRELL MINE (SEE SEPARATE REPORT, THIS FILE), PREVIOUSLY OPERATED BY THE BRULE MINING CO. (OGLEBAY, NORTON AND CO., AGENT). THE CORRY '40' (SEE SEPARATE REPORT, THIS FILE), WAS OPERATED BY BRUCE THROUGH THE BERKSHIRE SHAFT. BERKSHIRE LATER OPERATED BY YOUNGSTOWN MINES CORP. AND SUBSEQUENTLY BY THE VERONA MINING CO. WORKED BY TOP-SLICING AND SUB-LEVEL CAVING, UNDERGROUND. BUCK GROUP SHIPPED THROUGH 1962, SEE BUCK MINE REPORT (THIS FILE) FOR PRODUCTION FIGURES OF GROUP THROUGH 1962.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1980 Yeager, Keith (Cannon, W.) Michigan Geological Survey Division
Updater 01-MAR-1997 Sutphin, D.M. U.S. Geological Survey
Editor 01-MAY-1997 Mason Jr., G.T. U.S. Geological Survey
Updater 09-AUG-2001 Anderson, Arlene (M. Gere) Michigan Department of Natural Resources

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site