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Plomosas

Producer in Chihuahua, Mexico with commodities Silver, Lead, Zinc, Copper, Cadmium, Bismuth
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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. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Production statistics
  18. Reserves and resources
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10106944
MRDS ID MX02133
Record type Site
Current site name Plomosas
Alternate or previous names Sierra Las Plomosas
Related records 10206092, 10206302

Geographic coordinates

Geographic coordinates: -105.28384, 29.10023 (WGS84)
Location accuracy 10000(meters)
Relative position 15 KM E OF EL NEGRO. 30 KM N OF CHORRERAS

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Presidio(quadrangle 1:250,000 scale)

Geographic areas

Country State
Mexico Chihuahua

Comments on the location information

  • ESTIMATE TO WITHIN 1 KM. THERE ARE AT LEAST 4 MINE AREAS IN THIS DISTRICT. THE MINES ARE 3-10 KM W OF THE PUEBLO OF ALAMO.

Commodities

Commodity Importance
Silver Primary
Lead Primary
Zinc Critical Primary
Copper Tertiary
Cadmium Tertiary
Bismuth Critical Tertiary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Barite Gangue
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Weak Recrystallization Near Ore

Mineral occurrence model information

Model code 72
USGS model code 19a
Deposit model name Polymetallic replacement
Mark3 model number 47

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Syenite
    Rock unit name Microsyenstock
    Rock description Microsyenstock
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate
    Rock unit name Marine Carbonaceous Seds
    Rock description Marine Carbonaceous Seds

Nearby scientific data

(1) -105.28384, 29.10023
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Center Of Mexican Thrust Belt, E Margin Of Sierra Madre Occidental Volc. Plateau, Near E Chihuahua Mid Tert. Volc. Outlier.
Type of structure Local
Structure description Laramide Folding, District Wide Deformation

Ore body information

  • General form HORIZONAL "BLANKET" MANTO

Controls for ore emplacement

  • Concentrated In Limestone Beds Below Shale And In Brecccia Zones Along Nnw -Trending Fold Areas, Terraces On The Limbs Of The Folds, Fold Related Faults.

Comments on the geologic information

  • REGIONAL GEOLOGY COMPRISED MAINLY OF UNDEFORMED CONTINENTAL VOLCANIC ROCKS. THE DEOOSIT OCCURS IN LIMESTONE, SHALE, AND LIMEY SHALE WITH MINOR AMOUNTS OF PRIMARY DOLOMITE, RED BEDS, EVAPORITES, AND ORGANIC RICH SEDIMENTS THERE DOESN'T ACCORDING TO MEGAW ET AL, 1988 APPERAR TO BE ANY ASSOCIATION WITH VOLCANISM AND NO NEARBY OR RELATED CALDERA.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1942

Mining district

District name Plamosas District/Alamos Area

Ownership information

  • Type Owner-Operator
    Owner Industrial Minera Mexico, S. A. (Immsa)

Production statistics

  • Year 1975
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^13. % Zn, 6.7 % Pb, 66 G/Mt Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Lead Lead 7wt-pct
    Ore Zinc Zinc 13wt-pct
    Ore Silver Silver 66g/mt

Reserves and resources

  • Type In-situ
    Estimate year 1975
    Total resources 890000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 7.7 wt-pct Lead Major 1975
    Zinc Zn 14 wt-pct Zinc Major 1975
    Silver Ag 63 g/mt Silver Major 1975
  • Type In-situ
    Estimate year 1985
    Total resources 31000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 4 wt-pct Lead Major 1985
    Copper Cu 3 wt-pct Copper Trace 1985
    Silver Ag 100 g/mt Silver Major 1985
  • Type In-situ
    Estimate year 1988
    Total resources 15000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Lead Pb 8 wt-pct Lead Major 1988
    Zinc Zn 16 wt-pct Zinc Major 1988
    Silver Ag 55 g/mt Silver Major 1988

Comments on the reserve resource information

  • ITEM ONE - PROBABLE. ITEM TWO-POSSIBLE
  • RESERVES AND TONNAGE PRODUCED

Comments on development

  • THE ORE IS BEST IN PLOMOSAS AND CASITA FORMATION IN THE LIMESTONE BELOW SHALEY BEDS. ; MILL.CAP: 208 MET TONS ; ECON.YEAR: 1975 ; ECON.COM: 570 MTPD MILL

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

    GUILD, P.W., 1981, PRELIMINARY METALLOGENIC MAP OF NORTH AMERICA: U.S. GEOLOGICAL SURVEY CIRCULAR 858-A AND -B.

  • Deposit

    SOCIEDAD GEOLOGICA MEXICANA A.C., 1985, PLANO GEOLOLGICO MINERO DE CHIHUAHUA, MEXICO: CONSEJO DE RECURSOS MINERALES AND FEDERAL GOVERNEMNT OF MEXICO D.F., 1 SHEET, SCALE 1:500,000

  • Deposit

    SPP, 1983, OJINAGA

  • Deposit

    MEGAW,P.K.M., ET AL, 1988

  • Deposit

    CONEY, P.J., AND CAMPA, M.F., 1987

  • Deposit

    BRIDGES, L.W., 1964

  • Deposit

    ESCANDON-V.,F.J., 1971

  • Deposit

    1975, PLOMOSAS STRATIFORM LEAD AN ZINC DEPOSITS

  • Deposit

    REID, S.G., 1972

  • Deposit

    CLARK, K.F., AND PONCE,S., B.F., 1983

  • Deposit

    BRIDGES, L.W., 1964A

  • Deposit

    BRIDGES, L.W., 1964B,

  • Deposit

    BRIDGES, L.W., 1970,

  • Production

    E/MJ INTL. DIRECTORY, 1976, P. 255

  • Reserve-Resource

    E/MJ INTL. DIRECTORY 1976, P. 266

General comments

Subject category Comment text
Deposit MASSIVE SULFIDES GALENA, SPHALERITE 8% PB, 16% ZN . SIMILAR DEPOSIT TO SANTA EULALIA POND LOS LAMENTOS.
Deposit MICROSYEN STOCK 7 KM SE. POSSIBLY PREMINERALIZATION FELSIC DIKES, NO POST ORE INTRUSIONS. FELSIC PORPHYRITIC DIKES EXPOSED 2 KM SE AND 3 KM NW OF MINES MAY BE ASSOC. WITH MINERALIZATION?

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-76 Schruben, Paul G. U.S. Geological Survey
Updater 01-JAN-88 Leonard, Kenneth R. U.S. Geological Survey
Updater 01-AUG-91 Kibbe, R.D. (Staude, J-M.G.) U.S. Geological Survey

Beyond USGS

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

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