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Margarita Mine Group

Past Producer in Santa Cruz county in Arizona, United States with commodities Gold, Silver, Lead, Copper, Zinc
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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. Production statistics
  19. Reserves and resources
  20. Workings at the site
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10039541
MRDS ID M050245
Record type Site
Current site name Margarita Mine Group
Alternate or previous names Mcdonald, Golden Eagle, Rob Roy
Related records 10026771, 10137663

Geographic coordinates

Geographic coordinates: -111.25569, 31.44514 (WGS84)
Elevation 1311
Relative position ABOUT 2 MILES W OF RUBY, 75 MILES SW OF TUCSON.

Site location context

Political divisions (FIPS codes)

Santa Cruz(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bartlett Mountain(quadrangle 1:24,000 scale)

Atascosa Mountains(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rio De La Concepcion(hydrologic unit)

Rio De La Concepcion(hydrologic accounting unit)

Sonora(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 Santa Cruz

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 023S 011E 07 Arizona

Comments on the location information

  • INFO FROM LAND.ST :(1979)

Commodities

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

Comments on the commodity information

  • SULFIDES ARE OXIDIZED.

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Silver Ore
Sphalerite Ore
Quartz Gangue
Pyrite Unknown

Alteration

  • (Local) Sericitization; Silicification; Propylitization; Qtz-Ser-Pyr

Analytical data

Result RICHEST ZONE SAID TO CONTAIN 0.3 OZ AU & 0.5 OZ AG PER TON.

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Rock unit name Cobre Ridge Tuff
    Rock description Cobre Ridge Tuff
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -111.25569, 31.44514
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Block Faulting

Ore body information

  • General form TABULAR
    Depth to top 0M

Controls for ore emplacement

  • Fractures

Comments on the geologic information

  • MINE IS IN A SILICIFIED ZONE SURROUNDED BY NON-WELDED RHYOLITE TUFF OF THE COBRE RIDGE TUFF FORMATION. ; GEOL.DESC: AREAS WITH MOST ABUNDANT PSEUDOMOPHS OF LIMONITE ARE RICHEST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1895
Year of first production 1895
Year of last production 1941
Production years 1934-1941

Mining district

District name Oro Blanco District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Crossland Industries Corp.
    Home office New York
    First year 1986

Production statistics

  • Year 1941
    Period 1903-1941
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^Averaged 0.3 Oz. Au Per Ton, 0.6 Oz. Ag Per Ton, And Minor Pb And Cu.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Silver Silver 17g/mt
    Minor Ore Gold Gold 8g/mt

Comments on the production information

  • ORIGINALLY WORKED IN THE 1890'S.

Reserves and resources

  • Type In-situ
    Estimate year 1986
    Total resources 204000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.177 g/mt Gold Major 1986
  • Type In-situ
    Estimate year 1988
    Total resources 199000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 2.032 g/mt Gold Major 1988

Workings at the site

  • Type of workings Surface/Underground
    Area 160000HA
    Length 365.76M
    Overall length 60.96M
    Overall width 30.48M

Comments on the workings information

  • NUMEROUS OPEN CUT, SHAFT, AND ADIT OPERATIONS. MOSTLY SHALLOW WORKINGS.

Comments on development

  • PAST OPERATORS INCLUDE F. DANIELS (1936-39), MARGARITA GOLD MINES CO. (1934-35), C.G. WECHLER (1941). 1984-86: PORELIMINARY FEASIBILITY STUDY, BULK SAMPLE FOR METALLURGICAL EVALUATION.

Reference information

Bibliographic references

  • Deposit

    WILSON AND OTHERS, 1934, ARIZONA LODE GOLD MINES: ABM BULL 137.

  • Deposit

    KNIGHT, L.H., JR., 1970, ORO BLANCO DISTRICT: UNIV. ARIZ. PH.D. THESIS.

  • Deposit

    YEEND, WARREN, 1973.

  • Deposit

    ABGMT-USBM FILE DATA.

  • Deposit

    ABM BULL 191, P. 64.

  • Deposit

    NIEMUTH, N.J., 1987, ARIZONA MINERAL DEVELOPMENT 1984-1986: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY 29, 46 P.

  • Deposit

    SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: UNITED STATES BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

  • Other Database

    CIMRI

  • Production

    KEITH, 1975.

  • Reserve-Resource

    NIEMUTH, 1987; SAWYER AND OTHERS, 1992.

General comments

Subject category Comment text
Deposit IRREGULAR SILICIFIED ZONE CONSISTS OF NUMEROUS QUARTZ VEINLETS AND STRINGERS WITH ABUNDANT LIMONITE AFTER PYRITE IN SERICITIZED TUFF. DEPOSIT IS FLAT-LYING.
Deposit Discovery Year: 1890'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1972 Johnson, Maureen G. U.S. Geological Survey
Updater 01-MAY-1982 Laraba, Peter (Calder, Susan R.) U.S. Geological Survey
Updater 01-FEB-1993 Orris, Greta J. 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.