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  3. Mineral Resource Data System (MRDS)

Brownell Mine

Producer in Pima county in Arizona, United States with commodities Silver, Copper, Gold
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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. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10026739
MRDS ID M000023
Record type Site
Current site name Brownell Mine
Alternate or previous names Century-Chief, Index Groups, Dandy
Related records 10113580

Geographic coordinates

Geographic coordinates: -112.13933, 32.24817 (WGS84)
Elevation 683
Relative position 6 MILES NNW OF QUIJOTOA TRADING POST

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Maish Vaya(quadrangle 1:24,000 scale)

Ajo(quadrangle 1:100,000 scale)

Ajo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Santa Rosa Wash(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

BIA(Federal land areas administered by BIA)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 013S 002E 35 Arizona

Comments on the location information

  • CENTER SECTION 35 . PAPAGO INDIAN RESERVATION

Commodities

Commodity Importance
Silver Primary
Copper Primary
Gold Secondary

Materials information

Materials Type of material
Copper Ore
Hematite Ore
Pyrite Ore

Alteration

  • (Local) Silicification Of Rhyolite In Places, Ferruginous Staining

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -112.13933, 32.24817
ListMap

Economic information

Ore body information

  • General form IRREGULAR, SPOTTY

Controls for ore emplacement

  • Fractures In Mesozoic Rocks, At Or Near Contact Of Rhyolite And Andesite

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Production statistics

  • Year 1929
    Period 1900 - 1929
    Accuracy Estimate
    Description Cp_Grade: ^3 % Cu, 8 Oz Ag/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 226g/mt
    Major Ore Copper Copper 3wt-pct

Comments on the production information

  • SPORADIC PRODUCTION IN EARLY 1900'S AND 1920'S.

Workings at the site

  • Type of workings Underground
    Overall depth 70.1M

Comments on the workings information

  • 4 SHAFTS, ONE 230 FT, ONE 45 FT, ONE 100 FT, ONE 40 FT, AND VARIOUS SHALLOW SHAFTS AND OPEN CUTS

Comments on development

  • AT LEAST 8 UNPATENTED CLAIMS, ALL WITH WORKINGS

Reference information

Bibliographic references

  • Deposit

    KEITH, S. B., 1974 , INDEX OF MINING PROPERTIES IN PIMA COUNTY, ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 189 , P. 140 .

  • Deposit

    ARIZONA DEPT OF MINERAL RESOURCES FILE DATA

  • Production

    ABM BULLETIN 189 , P. 140 , USBM CARD FILE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 Johnson, Kris H. (Creasey, S.C.) U.S. Geological Survey
Updater 01-OCT-1981 Gest, Don E. U.S. Geological Survey

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.