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  3. Mineral Resource Data System (MRDS)

El Cacao Mine

Occurrence in Guanacaste, Costa Rica 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. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10007853
MRDS ID CS00083
Record type Site
Current site name El Cacao Mine
Alternate or previous names Lagarto Area

Geographic coordinates

Geographic coordinates: -85.74579, 10.12747 (WGS84)
Elevation 98

Site location context

Political divisions (FIPS codes)

Guanacaste(province)

Costa Rica(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Costa Rica Guanacaste

Comments on the location information

  • ROBERTS (1944) LOCATES MINE 6.5 KM E OF LAGARTO AND 3 KM W OF EL ESPAVELAR MINE, MRDS REC. NO. 81. SEARS (1919) SHOWS IT ABOUT 5 KM S OF EL ESPAVELAR MINE.

Commodities

Commodity Importance
Manganese Critical Primary

Comments on the commodity information

  • JASPER CONTAINS PARTLY OXIDIZED BRAUNITE AND BEMENTITE A FEW METERS BELOW THE SURFACE.

Materials information

Materials Type of material
Bementite Ore
Braunite Ore

Alteration

  • (Local) Basalt Is Altered

Mineral occurrence model information

Model code 97
USGS model code 24c
Deposit model name Volcanogenic Mn

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale

Nearby scientific data

(1) -85.74579, 10.12747
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Economic information

Ore body information

  • General form REPLACEMENT BODIES, POCKETS, VEINS
    Strike N 80 W
    Dip 30 NE
    Thickness 1M

Comments on the geologic information

  • THE ALTERED BASALT UNDERLIES THE RED SHALE IN THE LARGEST PIT.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Rio Seco-Lagarto District

Comments on the production information

  • ORE OF SUCH LOW GRADE THAT NONE SHIPPED.

Comments on the reserve resource information

  • ONLY A FEW METRIC TONNES OF SILICEOUS ORE.

Comments on the workings information

  • SURFACE TRENCHES AND PITS; ADIT.

Comments on development

  • CONSIDERABLE TRENCHING DONE IN 1917.

Reference information

Bibliographic references

  • Deposit

    SEARS, J. D., 1919, DEPOSITS OF MANGANESE ORE IN COSTA RICA: U.S. GEOL. SURV. BULL. 710-C, P. 71-72.

  • Deposit

    ROBERTS, R. J., 1944, MANGANESE DEPOSITS IN COSTA RICA: U.S. GEOL. SURV. BULL. 935-H, P. 403.

  • Deposit

    U.S. GEOLOGICAL SURVEY, DIRECCION GENERAL DE GEOLOGIA, MINAS E HIDROCARBUROS, UNIVERSIDAD DE COSTA RICA, 1987, MINERAL RESOURCE ASSESSMENT OF THE REPUBLIC OF COSTA RICA: U.S. GEOLOGICAL SURVEY MISCELLANEOUS INVESTIGATION SERIES MAP I-1865, 75 P.

  • Production

    ROBERTS (1944)

General comments

Subject category Comment text
Deposit POCKETS AND VEINS OF BRAUNITE AND BEMENTITE IN 1 M THICK JASPER ZONE THAT REPLACES RED SHALE ALONG BEDDING PLANES AND THINS NE AND SW OF THE LARGEST PIT IN AREA. IN THE OTHER CUTS, SPARSE VEINLETS AND POCKETS OF MN OXIDES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1986 Howe, Stephen S. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan U.S. Geological Survey

Beyond USGS

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

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