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  3. Mineral Resource Data System (MRDS)

Columbia Mine Group

Producer in Santa Cruz county in Arizona, United States with commodities Lead, Silver, Gold, Copper
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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. 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. Ownership information
  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 10046342
MRDS ID M241356
Record type Site
Current site name Columbia Mine Group
Alternate or previous names Silent Friend, Tumacacori
Related records 10137366

Geographic coordinates

Geographic coordinates: -110.92596, 31.4032 (WGS84)
Elevation 1219
Relative position 1/2 MILE NW OF MT. BENEDICT (ELV. 4565)

Site location context

Political divisions (FIPS codes)

Santa Cruz(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rio Rico(quadrangle 1:24,000 scale)

Nogales(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)

Geographic areas

Country State County
United States Arizona Santa Cruz

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 023S 014E 29 SE OF NE Arizona

Comments on the location information

  • ON THE NW SLOPE OF MT. BENEDICT; ABOUT 1 MILE W OF LION MINE ; INFO FROM LAND.ST :(1979)

Commodities

Commodity Importance
Lead Primary
Silver Primary
Gold Primary
Copper Secondary

Materials information

Materials Type of material
Anglesite Ore
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Minor

Analytical data

Result 100 TONS OF ORE AVERAGING ABOUT 5% PB, 5OZ/TON AG, .5 OZ/TON AU, .5% CU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Quartz Monzonite Of Mount Benedict
    Rock description Quartz Monzonite Of Mount Benedict
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Jurassic
    Chronological age 160

Nearby scientific data

(1) -110.92596, 31.4032
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Numerous N-W Trending Aplite Dikes; Major Fault Trending N-S.

Ore body information

  • General form TABULAR
    Strike N 80 E
    Dip 50S
    Width 1.22M
  • General form TABULAR
    Dip 50S

Controls for ore emplacement

  • Parallel, East-West Veins In Irregular Shear Zones Within Quartz Monzonite.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1928
Year of last production 1941

Mining district

District name Nogales District

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Farmer, H. J.
    First year 1939

Workings at the site

  • Type of workings Underground
    Length 109.73M
    Overall depth 15.24M
    Overall length 109.73M

Comments on the workings information

  • NUMEROUS SHAFTS AT VARIOUS DEPTHS (3,10,15 AND 50). ONE 360-FT TUNNEL WITH A 60-FT DRIFT TO THE WEST AND A 18-FT DRIFT TO THE EAST.

Comments on development

  • OTHER PAST OPERATORS INCLUDE: T. RAWSON, DAVID WOLFEN, E.R. THURMAN G UNPATENTED CLAIMS: LAST CHANCE, SILENT FRIEND, TEXAS STEER, GOLDEN REEF, FAIRVIEW AND QUEEN BEE.

Reference information

Bibliographic references

  • Deposit

    USBM-ABGMT PRODUCTION FILE DATA

  • Deposit

    USBM FILE DATA-CLUSTER #30-COLUMBIA MINE GROUP

  • Deposit

    ADMR FILE DATA-COLUMBIA (SILENT FRIEND) FILE

  • Deposit

    USGS BULL 582, P. 352-353

  • Deposit

    USGS MAP I-762

  • Deposit

    ARIZ BUR MINES BULL 191, P.60

General comments

Subject category Comment text
Deposit BANDED QUARTZ AND MINERALIZED ROCK; DEPOSITS OCCUR IN TWO E-W VEINS ABOUT 250 FT APART; VEINS CONSISTS OF MASSIVE QUARTZ, CRUSHED, SHEARED, ALTERED QUARTZ MONZONITE AND DARK INTRUSIVE DIORITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1982 Laraba, Peter H (Calder, Susan) Arizona Bureau of Geology and Mineral Technology

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.