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

Omega Mine

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

Geologic information

Identification information

Deposit ID 10103745
MRDS ID M050179
Record type Site
Current site name Omega Mine
Alternate or previous names Omega Tunnel, Omega Extension
Related records 10283863

Geographic coordinates

Geographic coordinates: -110.76929, 31.85402 (WGS84)
Elevation 1554
Relative position 1.5 MI E OF HELVETIA, 1/4 MI S OF ISLE ROYALE MINE

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Helvetia(quadrangle 1:24,000 scale)

Fort Huachuca(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Santa Cruz(hydrologic unit)

Santa Cruz(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 Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 018S 015E 24 W OF CENTER Arizona

Commodities

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

Materials information

Materials Type of material
Chalcopyrite Ore
Powellite Ore
Pyrite Ore
Sphalerite Ore
Sericite Gangue

Alteration

  • (Local) Epidotized And Altered Limestone

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Continental Granodiorite
    Rock description Continental Granodiorite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Martin Formation;Escabrosa Limestone;Horquilla Limestone
    Rock description Martin Formation;Escabrosa Limestone;Horquilla Limestone

Nearby scientific data

(1) -110.76929, 31.85402
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Homoclinal, Tilting And Broad Open Folds In S; Extensive Faulting I N N.
Type of structure Local
Structure description Wnw Striking Thrust Fault Zone, Permeable Fracture Zones

Ore body information

  • General form IRREGULAR

Controls for ore emplacement

  • Thrust Fault Zone

Comments on the geologic information

  • MN OXIDES MAY ACTUALLY BE CRUSHED MAGNETITE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1877
Year of last production 1920

Mining district

District name Helvetia-Rosemont District

Land status

Ownership category National Forest

Production statistics

  • Year 1920
    Period 1880-1920
    Material CU AG ORE
    Accuracy Estimate
    Description Cp_Grade: ^6% Cu, 1 Oz/T Ag, Minor Pb
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 28g/mt
    Major Ore Copper Copper 6wt-pct

Comments on the production information

  • FIRST CU PRODUCED IN ANY CONSIDERABLE QUANTITY IN PIMA COUNTY CAME FROM THIS MINE

Workings at the site

  • Type of workings Surface/Underground
    Length 609.6M
    Overall depth 91.44M

Comments on the workings information

  • TUNNELS, SHAFTS, OPEN CUTS

Comments on development

  • OPERATORS INCLUDED L. ZECKENDORF, ROBERT MCKAY

Reference information

Bibliographic references

  • Deposit

    SCHRADER, 1915, USGS BULL 582

  • Deposit

    ABM, 1971, FIELDNOTES V1, NO 2

  • Deposit

    DREWES, 1971, USGS MAP I-613

  • Deposit

    CREASEY & QUICK, 1955, USGS BULL 1027 F

  • Deposit

    KEITH, 1974, ABM BULL 189

  • Deposit

    JOHNSON, 1941, PHD THESIS, UNIV OF AZ, 111 P.

  • Production

    KEITH, 1974; USBM FILE DATA

General comments

Subject category Comment text
Deposit THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M05179 WITH REC ORD M030534 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEODO RE, USGS ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1983 Peterson, Jocelyn A. U.S. Geological Survey

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.