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Florida-Barrigon

Past Producer in Sonora, Mexico with commodities Copper, Molybdenum, Zinc, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Economic information about the deposit and operations
  13. Mining district
  14. Reserves and resources
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10048851
MRDS ID MX00021
Record type Site
Current site name Florida-Barrigon
Alternate or previous names La Florida De Nacozari
Related records 10255383

Geographic coordinates

Geographic coordinates: -109.72286, 30.38073 (WGS84)
Relative position NEAR NACOZARI DE GARCIA, 1 KM W OF NUEVA CASAS GRANDES.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Sonora

Commodities

Commodity Importance
Copper Primary
Molybdenum Secondary
Zinc Critical Tertiary
Silver Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Chrysocolla Ore
Malachite Ore
Molybdenite Ore
Sphalerite Ore
Actinolite Gangue
Apatite Gangue
Biotite Gangue
Calcite Gangue
Chlorite Gangue
Epidote Gangue
Magnetite Gangue
Pyrite Gangue
Quartz Gangue
Rutile Gangue
Sphene Gangue

Alteration

  • (Local) Potassic Alteration Followed By Quartz-White Mica-Pyrite Alteration Contemporaneous With Introduction Of Stockwork.

Analytical data

Result OXIDE ZONE: 530-3500 PPM CU
Result HYPOGENE: UP TO 2.0% CU, 20-150 PPM MO, 63-230 PPM ZN, 5-13 PPM AG
Result 50-1900 PPM CU IN ALTERED DACITE PORPHYRY.

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Eocene
    Chronological age 43.2

Nearby scientific data

(1) -109.72286, 30.38073
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Economic information

Geologic structures

Type of structure Local
Structure description N-S Structural Trend

Comments on the geologic information

  • COUNTRY ROCK: STEEPLY DIPPING, TIGHTLY FOLDED AND METAMORPHOSED EARLY CRETACEOUS QUARTZITE, LIMESTONE, CONGLOMERATE, AND TUFF CORRELATED TO BISBEE GROUP (MCANULTY, 1970); UNCONFORMABLY OVERLAIN BY ANDESITE. SECTION INTRUDED BY DACITE PORPHYRY (HYPABYSSAL INTRUSIVES, FLOWS AND SILLS). ANDESITE IS INTENSELY HYDROTHERMALLY ALTERED AND HOSTS MAJOR CU MINERALIZATION. UPPERMOST LARAMIDE-AGE ROCKS IN THE AREA CONSIST OF 1> RHYOLITE TUFF, VOLCANIC BRECCIA, ANDESITE, AND ANDESITIC TUFF UNIT ASSIGNED (MCANULTY, 1970) TO THE REPRESO MEMBER OF THE EJIDO RHYOLITE; 2> VALLE ANDESITE (MCANULTY, 1970).

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No

Mining district

District name Nacozari

Reserves and resources

  • Type In-situ
    Estimate year 1985
    Total resources 45000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.35 wt-pct Copper Major 1985

Comments on the reserve resource information

  • 1> DEVELOPED ORE.

Reference information

Bibliographic references

  • Deposit

    PEREZ SEGURA, EFREN, 1985, CARTA METALOGENETICA DE SONORA 1:250000 UNA INTERPRETACION DE LA METALOGENIA DE SONORA: UNIV. OF SONORA, DEPT. OF GEOL., HERMOSILLO, MEXICO, 66 P.

  • Deposit

    THEODORE, T.G., AND PRIEGO DE WIT, M., 1978, PORPHYRY-TYPE METALLIZATION AND ALTERATION AT LA FLORIDA DE NACOZARI, SONORA, MEXICO: USGS JOURNAL OF RESEARCH, V. 6, NO. 1, P. 59-72. (SAME AS OFR 76-760)

  • Deposit

    COX, D.P., AND SINGER, D.A., 1986, MINERAL DEPOSIT MODELS: USGS BULLETIN 1693, 379 P.

General comments

Subject category Comment text
Deposit TWO GENERATIONS OF PORPHYRY COPPER MINERALIZATION IN ANDESITE. 1> EARLY STAGE CHALCOPYRITE ASSOCIATED WITH PERVASIVE F. GR. SECONDARY BIOTITE; 2> LATER STAGE QUARTZ-CALCITE-CHLORITE STOCKWORK CARRYING CHALCOPYRITE WITH SUBORDINATE MOLYBDENITE, SPHALERITE, AND LOCALLY CONTAINING LAUMONTITE. SUPERGENE MALACHITE AND CHRYSOCOLLA PRESENT IN SURFACE EXPOSURES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1987 Staude, John-Mark G. (Page, Norman J.) U.S. Geological Survey
Updater 01-JUN-1988 Leonard, Kenneth R. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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