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  3. Mineral Resource Data System (MRDS)

Two Brothers Mine

Past Producer in Santa Cruz county in Arizona, United States with commodities Gold, Lead, Silver, 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. Host and associated rocks
  8. Nearby scientific data
  9. Geologic structures
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Land status
  14. Production statistics
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10026826
MRDS ID M000431
Record type Site
Current site name Two Brothers Mine
Related records 10210530

Geographic coordinates

Geographic coordinates: -110.92707, 31.39708 (WGS84)
Elevation 1219
Relative position MT. BENEDICT, 4 MILES N. OF NOGALES.

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 CENTER OF E Arizona

Comments on the location information

  • INFO FROM LAND.ST :(1965)

Commodities

Commodity Importance
Gold Primary
Lead Primary
Silver Primary
Copper Secondary

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -110.92707, 31.39708
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Wall Rock Is Brecciated

Ore body information

  • General form IRREGULAR

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1880
Year of last production 1915

Mining district

District name Nogales District

Land status

Ownership category Private

Production statistics

  • Year 1915
    Period Mid1880-1915
    Accuracy Estimate
    Description Cp_Grade: ^Averaged 0.8 Oz. Au Per Ton, 4 % Pb, 4 Oz. Ag Per Ton, And Minor Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 113g/mt
    Major Ore Gold Gold 23g/mt
    Major Ore Lead Lead 4wt-pct

Comments on the production information

  • WORKED SPORADICALLY.

Comments on the workings information

  • SHALLOW SHAFT AND TUNNEL OPERATIONS

Reference information

Bibliographic references

  • Deposit

    KEITH, S.B., 1975, ARIZ. BUREAU OF MINES, BULL. 191, P. 61

  • Other Database

    CIMRI

  • Production

    KEITH, 1975

General comments

Subject category Comment text
Deposit SPOTTY MINERALIZATION, IN ROUGHLY BANDED QUARTZ.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1981 Harner, Joy L. (Peterson, Jo) 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.