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La Azteca

Past Producer in Baja California Sur, Mexico with commodity Manganese
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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. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Reserves and resources
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10049233
MRDS ID MX00500
Record type Site
Current site name La Azteca

Geographic coordinates

Geographic coordinates: -112.0779, 26.97722 (WGS84)

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Baja California Sur

Comments on the location information

  • ESTIMATED TO NEAREST 5 SECONDS.

Commodities

Commodity Importance
Manganese Critical Primary

Comments on the commodity information

  • LARGE TONNAGE OF MATERIAL CONTAINING UP TO 12% MN WITH HIGH SILICA CONTENT.

Materials information

Materials Type of material
Manganite Ore
Psilomelane Ore
Pyrolusite Ore
Rhodochrosite Ore
Rhodonite Ore
Wad Ore
Calcite Gangue
Epidote Gangue
Gypsum Gangue
Quartz Gangue

Analytical data

Result MOST ORE: 19.21% MN
Result SELECTED ORE: 42.50% MN

Mineral occurrence model information

Model code 156
USGS model code 25g
Deposit model name Epithermal Mn

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Comondu Formation
    Rock description Comondu Formation
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -112.0779, 26.97722
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Economic information

Ore body information

  • Strike N 45-66 W
    Dip 61 NE

Comments on the geologic information

  • ANDESITE LESS ALTERED THAN AT EL GAVILAN OR GUADALUPE.

Economic information about the deposit and operations

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

Mining district

District name /Mulege

Reserves and resources

  • Type In-situ
    Estimate year 1956
    Commodity Subtype Grade units Group Importance Year
    Manganese Mn 19.2 wt-pct Manganese Major 1956

Comments on the reserve resource information

  • IMPURE OXIDE ORE.

Comments on the workings information

  • OPEN CUT TRENDING N 66 W: 2.5 M WIDE X 5 M DEEP X 40 M LONG. 7 M SHAFT. TWO OTHER OPEN CUTS ALONG NW CONTINUATION OF VEIN.

Comments on development

  • SEVERAL HUNDRED TONS OF SELECTED ORE MINED, BUT NOT SHIPPED AS OF 1956 REPORT.

Reference information

Bibliographic references

  • Deposit

    GONZALEZ R., J., 1956, LOS YACIMIENTOS DE EL GAVILAN, LA AZTECA Y GUADALUPE, BAJA CALIFORNIA, MEXICO IN GONZALEZ R., J., (ED.), 1956, SYMPOSIUM SOBRE YACIMIENTOS DE MANGANESO, TOMO III: CONGRESO GEOLOGICO INTERNACIONAL, XX, MEXICO, 1956, P. 79-96.

  • Deposit

    TRASK, P.D. AND RODRIGUEZ C., J. JR., 1948, MANGANESE DEPOSITS OF MEXICO: U.S.G.S. BULLETIN 954-F, P. 228-238, 293-295, TABLE 17.

General comments

Subject category Comment text
Deposit SIMPLE, WELL-DEFINED MN VEIN, 0.75 M WIDE ALONG BEST MINERALIZED SECTION. AVE. WIDTH: 30 CM. ATTITUDE: N 45 W, 61 NE; CHANGES STRIKE TO N 66 W AT FOOT OF CERRO DE LA AZTECA. ORE HAS BANDED STRUCTURE. ORE MINERALS: PYROLUSITE, PSILOMELANE, MANGANITE, AND WAD. RHODOCHROSITE, BUSTAMITE AND RHODONITE KNOWN TO OCCUR. GANGUE: CALCITE, GYPSUM, QUARTZ, EPIDOTE, AND RARE CU-CARBONATES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1988 Leonard, Kenneth R. (Page, Norman J.) U.S. Geological Survey
Updater 01-MAY-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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