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Gem Mine

Past Producer in Gila county in Arizona, United States with commodities Copper, Gold, Silver, Lead, Zinc, Manganese
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10046315
MRDS ID M241221
Record type Site
Current site name Gem Mine
Alternate or previous names Gem and Boston, Cordova Mine
Related records 10113082

Geographic coordinates

Geographic coordinates: -110.77875, 33.4248 (WGS84)
Elevation 1305
Relative position 1.2 MILES WEST OF BUCKEYE MOUNTAIN

Site location context

Political divisions (FIPS codes)

Gila(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Globe(quadrangle 1:24,000 scale)

Globe(quadrangle 1:100,000 scale)

Mesa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Salt(hydrologic unit)

Salt(hydrologic accounting unit)

Salt(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Gila

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 001N 015E 13 NE OF SW OF SE Arizona

Comments on the location information

  • ON THE NORTH EAST SLOPE OF BUFFALO HILL, NEAR SUMMIT. ; INFO FROM LAND.ST :(1979)

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary
Lead Secondary
Zinc Critical Tertiary
Manganese Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Lead Ore
Hematite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Rock unit name Granite Prophyry, Schultze Granite, Found In Small Amounts On Dump
    Rock description Granite Prophyry, Schultze Granite, Found In Small Amounts On Dump
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Late Cambrian
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Late Cambrian
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Troy Quartzite
    Rock description Troy Quartzite

Nearby scientific data

(1) -110.77875, 33.4248
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ne Trending Faults And Paleozoic Sediments, Later Diabase Intrusions
Type of structure Local
Structure description Diabase Outcrops Nw Of A Ne Trending Fault, Troy Quartzite Se Of Fault. Shaft Is In Troy Quartzite, Most Ore Is In Underlying Diabase

Ore body information

  • General form LINEAR

Controls for ore emplacement

  • Ne Trending Fault Zone

Comments on the geologic information

  • MINERALIZATION PROBABLY ASSOCIATED WITH ETERT, POST-DIABASE FAULTING AND INTRUSION PERIOD, ALTHOUGH ONLY OUTCROP OF ETERT SCHULTZE GRANITE IS AT OLD DOMINION MINE TO SW.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1908
Year of last production 1947

Mining district

District name Globe Hills District

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Heron And Gribble
    First year 1947

Workings at the site

  • Type of workings Underground
    Overall depth 373.38M

Comments on the workings information

  • GEM SHAFT IS 1225FT DEEP WITH EXTENSIVE CROSS CUTTING AT 1,100 AND 1200 FT LEVELS; OTHER SHAFTS INCLUDE THE MALLORY (792 FT DEEP) AND BIRD

Comments on development

  • PREVIOUS OWNERS INCLUDE GLOBE-BOSTON COPPER MINING CO. (ORIGINAL OWNER); GLOBE CONSOLIDATED COPPER CO. (1908); CORDOVA COPPER CO. (1909), LECORA COPPER CO. (1920), J.R. AND R.C. HERON AND SYDNEY GRIBBLE (1940'S); J.W. AND G. H. SHIELDS (1927-1929); INCLUDED 21 CLAIMS IN 1920

Reference information

Bibliographic references

  • Deposit

    USGS PP 342, P. 104

  • Deposit

    ABGMT CLIPPINGS FILES

  • Deposit

    ABGMT-USBM FILE DATA

  • Deposit

    ADMR FILE DATA

  • Deposit

    WEED,W.H.,THE MINES HANDBOOK, VOL. XIV, 1920, P. 212

General comments

Subject category Comment text
Deposit PRINCIPLE VEINS ARE THE GEM AND THE FUTURE;

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1982 Roth, Frances A. (Gest, Don E.) Arizona Bureau of Geology and Mineral Technology

Beyond USGS

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

External references

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.