1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

San Antonio

Producer in Chihuahua, Mexico with commodities Silver, Zinc, Lead, Copper, Tin, Vanadium, Niobium (Columbium), Tungsten
Map
XML
JSON
KML
B
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. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10049491
MRDS ID MX02213
Record type Site
Current site name San Antonio
Alternate or previous names Santa Eulalia-East Camp
Related records 10182823

Geographic coordinates

Geographic coordinates: -105.76996, 28.59469 (WGS84)
Elevation 1800
Location accuracy 500(meters)
Relative position 25 KM S85E OF CHIHUAHUA CITY, 7 KM N70E OF SANTA EULALIA. 5 KM E OF EL POTOSI (SANTA ENLALIA-W CAMP), 20 Sec, 20 Sec, 20 Sec

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Chihuahua

Comments on the location information

  • ESTIMATED TO WITHIN 1.0 KM. REACHABLE BY HIGHWAY 45 E OF CHIHUAHUA CITY 25 KM.

Commodities

Commodity Importance
Silver Primary
Zinc Critical Primary
Lead Primary
Copper Secondary
Tin Critical Secondary
Vanadium Critical Secondary
Niobium (Columbium) Critical Tertiary
Tungsten Critical Tertiary

Comments on the commodity information

  • MOST PRODUCTION CAME FROM AG-ZN-PB-V-RICH OXIDE MATERIAL DERIVED FROM PRIMARY SILICATES. MINING IN LATER YEARS FOCUSED ON SULFIDE ORES.

Materials information

Materials Type of material
Cassiterite Ore
Chalcopyrite Ore
Columbite Ore
Galena Ore
Sphalerite Ore
Wolframite Ore
Actinolite Gangue
Epidote Gangue
Fluorite Gangue
Garnet Gangue
Hedenbergite Gangue
Hematite Gangue
Idocrase Gangue
Ilmenite Gangue
Ilvaite Gangue
Magnetite Gangue
Muscovite Gangue
Orthoclase Gangue
Pyrrhotite Gangue
Quartz Gangue
Scapolite Gangue
Topaz Gangue
Tourmaline Gangue
Tremolite Gangue

Alteration

  • (Local) Contact Between Limestone And Silicate Or Sulfide Bodies Generally Sharp. Limestone Often Exhibits A 1 Cm Thick Bleached And Recrystallized Selvage.

Analytical data

Result 10.7 OZ/MT AG, 8.4% PB, 7.2% ZN (DISTRICT AVERAGES)
Result SAN ANTONIO TIN CHIMNEY STOPES AVERAGED 1.5% SN WITH MAX. VALUES UP TO 4-5%. ASSAYS FROM DIFFERENT PARTS OF THE MINE SHOWED 0.23-0.50% V. T DEGREE C FLUID ON MINERALIZING FLUID 300-400 DEGREE C FOR SKARN AND 220-450 DEGREE C ON MASSIVE SULFIDES ORES. SALINITY 4-26 WT% NACL ON SKARN AND 1-5 WT% ON SULFIDE ORE. ESTIMATED PREESURE 0.3 KBARS. ISOTOPES 180=12.8 13C= -10.1 34S= +4+0-11. DATA ON ISOTOPES AND FLUID INSLUSIONS FROM MEGAW ET AL, 1988.

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 Volcanic Rock (Aphanitic) > Felsic Volcanic Rock
    Rock unit name San Antonio Dike
    Rock description San Antonio Dike
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -105.76996, 28.59469
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Reg.Struct: Mine Lies On The East Limb Of The Southward Plunging Portion Of A Broad Nnw-Trending, Doubly Plunging Anticline.
Type of structure Local
Structure description San Antonio Graben: Nne-Trending Graben, 4 Km X 1 Km, 140-250 M Displacement. Bounded On The West By A Single East-Dipping Fault, And On The East By A "Scissored" Pair Of West-Dipping Faults.

Ore body information

  • General form SULFIDE MANTOS ENCLOSED ROCKS NOT IMMEDIATLY ASSOCIATED WITH INTRUSIVE

Controls for ore emplacement

  • Emplacement Of Ore-Related Felsite Dikes Strongly Controlled By Fault Forming The Western Side Of A Large Graben.

Comments on the geologic information

  • GEOL.COM: THE REGIONAL STRATIGRAPHIC SECTION CONSISTS OF A SERIES OF CRETACEOUS CARBONATE AND EVAPORITE UNITS UNCONFORMABLY OVERLAIN BY TERTIARY VOLCANICS AND VOLCANICLASTIC SEDIMENTS. IN THE SAN ANTONIO MINE, A LARGE NNE-TRENDING GRABEN HAS OFFSET THE CRET CARBONATES AND THE LOWER PART OF THE TERT VOLCANIC SECTION. THE GRABEN STRONGLY CONTROLLED THE EMPLACEMENT OF A SERIES OF DIABASE SILLS AND FELSITE DIKES. MINERALIZATION IN THE SAN ANTONIO MINE IS SPATIALLY RELATED TO A SERIES OF EN-ECHELON FELSITE DIKES, 1-10 M WIDE, KNOWN COLLECTIVELY AS THE SAN ANTONIO DIKE. THE FELSITES COMMONLY CONTAIN DISSEMINATED PYRITE AND, LESS COMMONLY, SPHALERITE, GALENA AND ARSENOPYRITE IN A BANDED TEXTURE. THE MARGINS OF THE FELSITE BODIES ARE FREQUENTLY HIGHLY ALTERED AND BRECCIATED. THE FELSITES ARE ABOUT 10 M.Y. YOUNGER THAN THE DIABASE SILLS, WHICH HAVE BEEN DATED AT 37.5 M.Y. A QUARTZ-MONZONITE DIKE ALSO OCCURS IN THE MINE AREA. RECENTLY, AN INTRUSIVE BRECCIA DIKE OF SMALL EXTENT WAS UNCOVERED.
  • THE BRECCIA CONSISTS OF FRAGMENTS OF THE ENTIRE LOWER LIMESTONE SECTION, DIABASE, FELSITE, SILICATE AND SULFIDE ORE FRAGMENTS AND POSSIBLE FRAGMENTS OF A DEEP INTRUSIVE. ANGULARITY OF THE FRAGMENTS AND SHARPNESS OF THE CONTACT SUGGEST EXPLOSIVE EMPLACEMENT.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No
Discoverer Spanards
Year of first production 1625
Year of last production 1988

Mining district

District name Santa Eulalia

Ownership information

  • Type Operator
    Owner Immsa 1991
  • Type Owner
    Owner Industrials Minerales De Mexico, S. A.(Immsa)
    First year 1991

Comments on the production information

  • SEE RECORD FOR SANTA EULALIA DISTRICT.

Comments on development

  • EXPL.COM: EARLY PRODUCTION (PRIOR TO A 1925) CAME FROM OXIDIZED ORES. LATER MINING EXPLOITED SULFIDE ORES. MAJOR TIN ORE BODIES WERE MINED OUT BY THE EARLY 1940'S. MINERALIZATION GENERALLY OCCURS BELOW IMPERMEABLE SHALY UNITS, SILLS, VOLC. ROCKS IN THE CARBONATES. ; MILL.CAP: MILL IN 1991 RUNNING

Reference information

Bibliographic references

  • Deposit

    MORRIS, H.T., 1986, DESCRIPTIVE MODEL OF POLYMETALLIC REPLACEMENT DEPOSITS IN COX, D.P., AND SINGER, D.A., 1986, MINERAL DEPOSIT MODELS: U.S. GEOLOGICAL SURVEY BULLETIN 1693, P. 99.

  • Deposit

    MALDONADO E., D., AND MEGAW, P.K.M., 1983, GEOLOGY OF THE SANTA EULALIA MINING DISTRICT, CHIHUAHUA, MEXICO IN GEOLOGY AND MINERAL RESOURCES OF NORTH-CENTRAL CHIHUAHUA; GUIDEBOOK FOR THE 1983 FIELD CONFERENCE: EL PASO, TEXAS, EL PASO GEOLOGICAL SOCIETY, P. 367-376.

  • Deposit

    HEWITT, W.P., 1943, GEOLOGY AND MINERALIZATION OF THE SAN ANTONIO MINE, SANTA EULALIA DISTRICT, CHIHUAHUA, MEXICO: GEOLOGICAL SOCIETY OF AMERICA BULLETIN, V. 54, NO. 2, P. 173-204.

  • 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, 1984, CIUDAD DELICIAS

  • Deposit

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

  • Deposit

    SPP, 1978, AQUILES SERDAN

  • Deposit

    WALTER, TIMOTHY G., 1985, METALS DISTRIBUTION

  • Deposit

    TITLEY, S.R., AND MEGAW, P.K.M., 1985,

  • Deposit

    HEWITT, W.P., 1943,

  • Deposit

    1968, GEOLOGY AND MINERALIZATION OF THE MAIN MINERAL ZONEOF THE SANTA EULALIA DISTRICT

General comments

Subject category Comment text
Deposit BODY WAS A CHIMNEY OVER 300 M IN VERTICAL EXTENT ADJACENT TO THE SAN ANTONIO DIKE. MINERAL ASSEMBLAGE CONSISTED OF CASSITERITE ASSOCIATED WITH SPECULARITE, QUARTZ, TOPAZ, FLUORITE, MAGNETITE, TOURMALINE, AND WOLFRAMITE. SIGNIFICANT AMOUNTS OF VANADIUM ASSOCIATED WITH OXIDIZED SILICATE ORE.
Deposit SEE ALSO: EL POTOSI MINE (MRDS-REV RECORD NO. 2214). MEGAW ET AL, 1988, PAPER AND WALTER 1985, THESIS GIVE MANY OTHER REFERENCES. ; INFO.SRC : 1 PUB
Deposit MINERALIZATION DOMINANTLY IN THE FORM OF A TABULAR CALC-SILICATE, ZN-RICH CHIMNEY THAT IS ZONED ACROSS THE SAN ANTONIO DIKE FROM A SKARN ASSEMBLAGE TO A MASSIVE SULFIDE. CHIMNEY IS CROSSCUT BY SMALLER PB-RICH MANTOS OF LESSER ECONOMIC IMPORTANCE. SKARN SILICATES ARE ZONED IN RELATION TO THE DIKE, GRADING FROM A NARROW EPIDOTE-CHLORITE-FLUORITE ZONE ADJACENT TO THE DIKE OUTWARD INTO AN ACTINOLITE RICH (+/- GROSSULAR) ZONE, WHICH IN TURN GRADES OUTWARD INTO A GROSSULAR-RICH (+/- ACTINOLITE) ZONE. SILICATES LOCALLY GRADE INTO MASSIVE SULFIDE ORES, BUT MAY SHOW SHARP OUTER CONTACTS WITH LIMESTONE. SILICATE BODIES CONTAIN ECONOMIC AMOUNTS OF SPHALERITE, GALENA, PYRITE, AND MINOR AMOUNTS OF CHALCOPYRITE AND ARSENOPYRITE. MASSIVE SULFIDE CHIMNEYS COMPOSED OF SPHALERITE AND PYRITE, AND MANTOS CONSISTING OF GALENA AND PYRRHOTITE WITH SPHALERITE, BOTH OCCUR LOCALLY OUTSIDE OF THE SILICATE ZONES. SEVERAL TIN-CHIMNEYS AND VEIN REPLACEMENT LODES ALSO OCCUR ON UPPER LEVELS OF THE MINE. MAJOR TIN

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-88 Leonard, Kenneth R. (Page, Norman J.) 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.

Maps centered on this site