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Middlemarch Mine

Past Producer in Cochise county in Arizona, United States with commodities Copper, Silver, Zinc
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Mining district
  10. Land status
  11. Ownership information
  12. Production statistics
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10185304
MRDS ID M030567
MAS/MILS ID 0040030063
Record type Site
Current site name Middlemarch Mine
Alternate or previous names Missouri Mine, Missouri Shaft, Coronado Nf Dragoon Unit, Morning Glory Shaft
Related records 10037134

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -109.94896, 31.88043 (WGS84)
Elevation 1676
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Cochise(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cochise Stronghold(quadrangle 1:24,000 scale)

Chiricahua Peak(quadrangle 1:100,000 scale)

Douglas(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Willcox Playa(hydrologic unit)

San Pedro-Willcox(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Coronado National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Arizona Cochise

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 018 S 023 E 12 SE Arizona

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Zinc Critical Primary

Economic information

Comments on the geologic information

  • A 113 MT/DAY COPPER FLOTATION MILL OPERATED FROM ABOUT 1917 TO 1921. ABOUT 8,200 MT OF TAILINGS WITH O.2% CU AND 0.3-0.8% ZN REMAIN ON SITE.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1895
Year of first production 1895

Mining district

District name Middle Pass District

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner Lloyd Richards
    Home office Arizona
    Year 1990
    First year 1989

Production statistics

  • Year 1921
    Description Cu-Zn Ore 8902 Mt

Comments on the production information

  • PRODUCTION GIVEN IS FOR YEARS UP TO 1921.

Reserves and resources

  • Type In-situ
    Estimate year 1993
    Inferred 8200mt ore
    Total resources 8200mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.7 wt-pct Copper Major 1993
    Zinc Zn 6 wt-pct Zinc Major 1993
    Silver Ag 34 g/mt Silver Minor 1993
  • Type In-situ
    Estimate year 1993
    Inferred 24500mt ore
    Total resources 24500mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.7 wt-pct Copper Major 1993
    Zinc Zn 6 wt-pct Zinc Major 1993
    Silver Ag 34 g/mt Silver Minor 1993
  • Type In-situ
    Estimate year 1993
    Inferred 3400mt ore
    Total resources 3400mt ore
    Commodity Subtype Grade units Group Importance Year
    Zinc Zn 6 wt-pct Zinc Major 1993
    Silver Ag 34 g/mt Silver Minor 1993

Comments on the workings information

  • CORE DRILLING IN MIDDLEMARCH CYN. BY WEST PRIDE INDUSTRIES AND TOLTEC RESOURCES, BOTH OF CANADA.

Reference information

Bibliographic references

  • Deposit

    SNYDER, B. M., 1916, PRELIMINARY REPORT ON MIDDLEMARCH MINE,

  • Deposit

    UNPUB. REPORT AVAIL. AT ADMMR, 6 P.

  • Deposit

    SNYDER, B. M., 1919, THE MIDDLEMARCH MINE AND MILL: MINING

  • Deposit

    AND SCIENTIFIC PRESS, 2/8/19, P. 181-182.

  • Deposit

    WILSON, P. D., 1918, UNPUB. REPORT ON MIDDLEMARCH MINE,

  • Deposit

    AVAIL. AT ADMMR.

  • Deposit

    MAHONEY, C. G., 1942, UNPUB. USBM WAR MINERALS MEMO ON

  • Deposit

    MIDDLEMARCH MINE, 4 P.

  • Deposit

    CHATMAN, M. L., 1993, USBM OFR MLA 30-93, P. 17-23, D93-100.

Reporter information

Type Date Name Affiliation Comment
Reporter 29-MAR-1994 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines

Beyond USGS

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

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.