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Presque Isle Syncline

Occurrence in Gogebic county in Michigan, United States with commodities Copper, Silver
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10291586
MRDS ID W060095
MAS/MILS ID 0260530001
Record type Site
Current site name Presque Isle Syncline
Alternate or previous names Amax Michigan, Western Syncline
Related records 10082651

Comments on the site names

  • COPPER PRIORITY. OTHER NAMES:AMAX MICHIGAN;WESTERN SYNCLINE.

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -89.9834, 46.6833 (WGS84)
Elevation 229

Site location context

Political divisions (FIPS codes)

Gogebic(county)

Michigan(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tiebel Creek(quadrangle 1:24,000 scale)

Ontonagon(quadrangle 1:100,000 scale)

Iron River(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Black-Presque Isle(hydrologic unit)

Southcentral Lake Superior(hydrologic accounting unit)

Southern Lake Superior(hydrologic subregion)

Great Lakes(hydrologic region)

Geographic areas

Country State County
United States Michigan Gogebic

Public Land Survey System information

Meridian Township Range Section Fraction State
Michigan 050 N 045 W 31 C S2SW Michigan

Commodities

Commodity Importance
Copper Primary
Silver Secondary

Materials information

Materials Type of material
Bornite Unknown
Calcite Unknown
Chalcocite Unknown
Chalcopyrite Unknown
Chlorite Unknown
Copper Unknown
Covellite Unknown
Epidote Unknown
Greenockite Unknown
Hematite Unknown
Muscovite Unknown
Orthoclase Unknown
Plagioclase Unknown
Pyrite Unknown
Quartz Unknown
Silver Unknown

Nearby scientific data

Ore Body (1) -89.9834, 46.6833
ListMap

Economic information

Ore body information

  • Thickness 5.5M
    Length 6436M
    Width 3218M
    Area 2072HA
    Depth to top 150M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 SEDIMENTARY
    Type of Orebody #3 REPLACEMENT
    Primary mode of Origin SEDIMENTATION
    Primary Ore Control LITHOLOGY
    Secondary Ore Control OTHER
    Degree of Wallrock Alter. NONE
    Type of Wallrock Alter. #1 UNKNOWN
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 49
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 2072
    Date of Last Modification 790305

Comments on the geologic information

  • CHALCOCITE AND NATIVE CU ARE THE MAJOR ORE MINERALS
  • TIME OF ORE EMPLACEMENT IS CONTROVERSIAL. SOME INVESTIGATORS BELIEVE ORE IS AT LEAST IN PART SEDIMENTARY. OTHERS BELIEVE THAT ASCENDING WATER FROM PALEOAQUIFER IN COPPER HARBOR CONGLOMERATE MOVED INTO PYRITIC MUDS AND REPLACE THE PYRITE WITH CHALCOCITE. MOST WALLROCK ALTERATION IS PROBABLY DIAGENETIC. SOME BLACK SILTSTONE SHALE MEMBERS HAVE IRREGULAR OXIDIZED LAYERS AND ZONES WHICH SOME INVESTIGATORS INTERPRET AS WET SEDIMENT DEFORMATION OR MIXING.

Economic information about the deposit and operations

Operation type Underground
Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1950
Mining method Filled Stopes
Milling method Flotation

Mining district

District name White Pine District

Mineral rights holdings

Type of mineral rights Private Lease
Type of mineral rights Minerals Only

Land status

Ownership category State Park

Ownership information

  • Type Owner-Operator
    Owner Copper Range Co.
    Interest 100
    Home office Michigan
    Year 1994

Comments on the ownership information

  • 5/11/77 OWNER/OPERATOR RECORD-AMAX HAS LARGEST CONTROL BASED DRILL MAP VIEWED AT MICHIGAN SURVEY. APPROX = 85%, COPPER RANGE THE REMAINING LEASES OUTSIDE SOME PRIVATE HOLDINGS.

Comments on the production information

  • CU MILL RECOVERY = 86%

Comments on the reserve resource information

  • ORE BLOCKS REPORTED BY AMAX ARE 50,600,000 SHORT TONS AT 1.52% CU AND 54,400,000 SHORT TONS AT 1.04% CU FOR AN AVERAGE OF 95,000,000 METRIC TONS AT 1.27% CU.

Workings at the site

  • Type of workings Underground
    Length 6500M
    Overall depth 150M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OTHER FILLED STOPE METHODS
    Swell Factor .55
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK FISSURED WITH MODERATE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 2
    Length of Inclines (m) 90
    Slope of Inclines 7
    Number of Inclines 1
    Capacity 8000
    Capacity Units MT ORE/DAY
    Unit Production Cost 16.39
    Units of Production $/MT ORE
    Operating Days per Year 365
    Operating Shifts per Day 2
    Year of Information 1977

Comments on the workings information

  • 4/28/77 MANY TRAILS AND DIRT ROADS ARE EXISTING IN THE AREA, AND THUS ONLY NEED IS TO REBUILD OR REPAIR TO SUIT THE NEEDS ESTIMATES BASED ON 65 HECTARES FOR WHITE PINE PLANT SITE, 1445 HECTARES FOR WHITE PINE TAILINGS POND PLUS ROADS AND MINE ITSELF

Reference information

Bibliographic references

  • Deposit

    SOURCE- FILE TRANSFER FROM IFOC ON 9-14-76.

  • Deposit

    ,CARPRIVER QUADRANGLES, ETC, USGS MAP GP-579

  • Deposit

    REED,ROBT., 5/11/77 PERSONAL COMMUNICATION, STATE GEOLOGIST

  • Deposit

    GAN DEPARTMENT OF NATURAL RESOURCES.

  • Deposit

    USGS, 1956, THOMASTON QUADRANGLE TOPOGRAPHIC MAP, 15 MINUTE

  • Deposit

    WHITE, W.S., AND J.C. WRIGHT, 1966, SULFIDE-MINERAL ZONING IN THE BASAL NONESUCH SHALE, NORTHERN MICHIGAN, ECON GEOL, V.61, PG. 1171-1190.

  • Deposit

    ANON, XEROX COPY OBTAINED FROM ROBT. REED CONTAINING TONNAGE

  • Deposit

    ENSIGN, C.O. JR., ET AL. COPPER DEPOSITS IN THE NONESUCH SHALE,WHITE PINE, MICHIGAN. ORE DEPOSITS OF THE U.S. 1933-1967, JOHN RIDGE, EDITOR, AIME, VOL. 1, 1968, PP. 460-488.

  • Deposit

    ANON. PROXY STATEMENT COPPER RANGE COMPANY. WHITE PINE, MICHIGAN, JULY, 1975, P. 12-13.

  • Deposit

    ANON. ANNUAL REPORT AMERICAN METAL CLIMAX INC., 1958, P. 21.

  • Deposit

    ANON. SKILLINGS MINING REVIEW. V. 46, NO. 38, DEC. 21, 1957,

  • Deposit

    ANON. WAR MINERAL REPORT MEMORANDA. 1957-58, FILE 410-053, 1

General comments

Subject category Comment text
Deposit (PERS. COMM., BOB REED. MICHIGAN GEOLOGICAL SURVEY) ENTERED 6/77 FOR MAS CU STUDY BY E.F.O.C. MICHIGAN STATE UNIVERSITY,CONTRACT # J0366067, 8/24/76-4/30/ 78, JOHN WILBAND, PRINCIPAL INVESTIGATOR. REVIEWED AND REVISED IN FEBRUARY, 1978, BY E.F.O.C PITTSBURGH: COMMENT LINE NUMBERS 072-076,G001-G009,Q001- Q003,U001-U009,K001-K003,T001 BASED ON THIS STUDY 6/78 REVIEWED AFTER DATA BASE TRANSLATION E.F.O.C. LINES 79-81,I11-12,Y1,K4,AND T2 ADDED 7/11/78 BASED ON REVISED FINANCIAL ANALYSIS. COSTED AT 75% PROBABILITY LEVEL. THE DEPOSIT REVIEWED 11/78.

Reporter information

Type Date Name Affiliation Comment
Reporter 03-FEB-97 Brocoum, A. U.S. Bureau of Mines
Editor 05-JAN-11 Nicholson, S.W. U.S. Geological Survey Edited references

Beyond USGS

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

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