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La Argentina

Occurrence in Sonora, Mexico with commodities Antimony, 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. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10092697
MRDS ID MX00278
Record type Site
Current site name La Argentina
Related records 10303219

Geographic coordinates

Geographic coordinates: -112.58766, 30.74015 (WGS84)
Relative position 1.7 KM ESE OF EL ANTIMONIO, NEXT TO EL BRASIL IN THE LA MONTANA AREA.

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

Comments on the location information

  • ESTIMATE TO WITHIN 0.5 KM.

Commodities

Commodity Importance
Antimony Critical Primary
Silver Primary

Comments on the commodity information

  • SILVER-BEARING MINERAL, EITHER AG-BROMIDE OR MIXED BROMIDE AND CHLORIDE, IS BRIGHT YELLOW-GREEN WHEN FRESH, BUT RAPIDLY CHANGES TO GREENISH BLACK UPON EXPOSURE TO SUNLIGHT.

Materials information

Materials Type of material
Antimony Ore

Mineral occurrence model information

Model code 180
USGS model code 27d
Deposit model name Simple Sb (veins, pods, etc)

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
    Rock unit name Monos Formation
    Rock description Monos Formation
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Triassic

Nearby scientific data

(1) -112.58766, 30.74015
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description West Of Main Shaft Main Fault Is Cut By Several Premineral Cross Faults Striking N 15 W And Dipping 43-85 E. Displacement On Largest Cross Fault Ranges From 0.5 M To 3 M. Postmineral Movement Occurred On Most Of The Faults.

Ore body information

  • Strike N 45-60 W
    Dip 40-70 SW
    Thickness 2M
    Length 280M

Controls for ore emplacement

  • Ore Concentrated In Main Vein Below Intersections With Faults And Fractures; Natural Dams Formed Where West Side Of Principal Fissure Moved Relatively Upward. Ore Unrelated To Cross Faults Found In Gently Dipping Parts Of Vein.

Comments on the geologic information

  • NARROW PARTS OF MAIN (EASTERN) VEIN CONTAINED VERY LITTLE ANTIMONY. HIGH-GRADE ORE BODIES IN WIDER PARTS OF VEIN ESPECIALLY IN GENTLY DIPPING SECTIONS AND BELOW INTERSECTING FAULTS AND FRACTURES.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name El Antimonio/La Montana

Ownership information

  • Type Owner
    Owner Roberto Moreno (Date?)

Comments on the production information

  • NO RECORDS AVAILABLE. TOTAL (PRE-1943) PRODUCTION FROM EASTERN VEIN ALONE ESTIMATED TO BE BETWEEN 2000 AND 4000 METRIC TONS OF HIGH-GRADE ORE.

Workings at the site

  • Type of workings Underground
    Length 200M
    Overall depth 29M

Comments on the workings information

  • EASTERN VEIN: DEEPEST WORKINGS 29 M BELOW SURFACE. ABOUT 200 M OF UNDERGROUND WORKINGS, BUT NO REGULAR LEVELS. VERTICAL 40 M SHAFT NEAR SE END OF VEIN (FILLED TO DEPTH OF 15 M IN 1943.) ANOTHER 17 M SHAFT IN MIDDLE PART OF VEIN. MIDDLE AND WESTERN VEINS WORKED TO A DEPTH OF ABOUT 15 M (FILLED TO A DEPTH OF 10 M IN 1943.) WATER TABLE ESTIMATED TO BE ABOUT 45 M BELOW SURFACE.

Reference information

Bibliographic references

  • Deposit

    GUIZA, REINALDO, Y WHITE, DONALD E., 1949, LOS YACIMIENTOS ANTIMONIALES DE LA REGION DE EL ANTIMONIO, ESTADO DE SONORA: INST. NACIONAL PARA LA INVESTIGACION DE RECURSOS MINERALES, BOLETIN NUMERO 23, 47 P.

  • Deposit

    WHITE, D.E. AND GUIZA, REINALDO, 1949, ANTIMONY DEPOSITS OF EL ANTIMONIO DISTRICT, SONORA, MEXICO: U.S. GEOLOGICAL SURVEY BULLETIN 962-B, P. 99-100, PLATES 15,16.

  • Production

    GUIZA AND WHITE, 1949.

General comments

Subject category Comment text
Deposit AT LA ARGENTINA, SIX MAIN VEINS NEARLY PARALLEL TO PURPLE-GRAY ARENITE AND LIMONITE. EASTERN VEIN, 280 M LONG AND FROM 10 CM TO 2 M IN WIDTH, HAS BEEN MOST PRODUCTIVE IN THE DISTRICT. MIDDLE PART OF EASTERN VEIN THINS TO 10 - 20 CM AND CONTAINS 0.5 - 15 CM OF LOW-GRADE ORE ALONG HANGING WALL. MIDDLE AND WESTERN VEINS, GENERALLY 20 - 40 CM WIDE, ARE CUT BY SEVERAL PREMINERAL FAULTS. SILVER MINERAL, EITHER AG BROMIDE OR MIXED BROMIDE AND CHLORIDE, OCCURS AS COATING ON WALLS OF FRACTURES.
Deposit FORMERLY THE LARGEST PRODUCER IN THE DISTRICT. AS OF 1943, NO SYSTEMATIC DEVELOPMENT HAD BEEN UNDERTAKEN. ; INFO.SRC : 1 PUB

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1987 Staude, John-Mark G. (Page, Norman J.) U.S. Geological Survey
Updater 01-DEC-1987 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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