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  3. Mineral Resource Data System (MRDS)

Santa Rosalia

Producer in Baja California Sur, Mexico with commodity Copper
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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. 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. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10085146
MRDS ID W700689
Record type Site
Current site name Santa Rosalia
Alternate or previous names Santa Rosalia Mine

Geographic coordinates

Geographic coordinates: -112.35069, 27.33359 (WGS84)
Location accuracy 5000(meters)
Relative position ISLA SAN MARCOS MANGANESE, 10 KM OFF SHORE IN SEA OF CORTEZ

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

  • BAJA PENINSULA ON EASTERN GULF COAST. EASILY ACCESSIBLE BY CARRETERA 1.

Commodities

Commodity Importance
Copper Primary

Comments on the commodity information

  • CU OFTEN ASSOCIATED WITH SILICA MINERALS

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Malachite Ore

Alteration

  • (Local) Principaly Next To Ore, Find Rapid Decrease In Grade.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate

Nearby scientific data

(1) -112.35069, 27.33359
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Reg.Struct: Gentle Warping And Folding. Minor Faults Cut Ore Body, Offsets 10'S Of Feet.

Ore body information

  • General form TABULAR AND CONTINUOUS
    Thickness 12.19M
    Length 3218.6M
    Width 3218.6M
    Depth to top 0M
    Depth to bottom 304.8M

Controls for ore emplacement

  • Manto

Comments on the geologic information

  • GEOL.COM: DEPOSIT IS STRATIFIED STRATIBOUND VOLCANOGENIC? EPITHERMAL CU DEPOSIT

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1880
Year of first production 1888
Year of last production 1960
Production years 50-60 YEARS WITH BREAKS IN PRODUCTION

Mining district

District name Santa Rosalia/Santa Rosalia

Workings at the site

  • Type of workings Surface/Underground
    Area 1036HA
    Length 3218.6M
    Overall depth 304.8M
    Overall length 3218.6M
    Overall width 3218.6M

Comments on the workings information

  • GAMBOSINO PITS DOT EVERY HILL AND SHAFTS ABUNDANT THROUGHOUT HILLS NEAR TOWN. MOST OF MAJOR MINING DONE BY A FRENCH COMPANY BETWEEN 1880 AND 1940.

Comments on development

  • ORE PRODUCTION CAPACITY BETWEEN 300,000 AND 500,000 TONNES/YEAR. DISCOVERED BY GREEN SPECKS ON SIDE OF A HILL. DRILLING AND UNDERGROUND WORK HAS FAILED TO LOCATE THE SOURCE. ; ECON.COM: NEEDS TO BE THICKER BODY TO MAKE BULK MINEABLE.

Reference information

Bibliographic references

  • Deposit

    MINING MAGAZINE, JANUARY 1989, P. 46.

  • Deposit

    SECRETARIO DE PROGRAMACION Y PRESUPUESTO, 1989, LA PAZ: CARTA GEOGRAFICA, DIRRECION GENERAL DE GEOGRAFIA DEL TERRITORIO NACIONAL, MEXICO, D.F., 1:1,000,000.

  • Deposit

    STAUDE, JOHN-MARK G., 1990, PERSONAL VISIT AND COMMUNICATION.

General comments

Subject category Comment text
Deposit STRIKE, DIP, AND PLUNGE DIRECTION VARY. DIP IS NEAR HORIZONTAL. BEDDED, STRATIFORM 2-3 METERS THICK. SEDIMENTARY CU DEPOSIT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-89 Beougher, Dee (Spanski, Gregory T.) U.S. Geological Survey
Updater 01-JAN-91 Staude, John-Mark 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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