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B-8

Occurrence in Guanacaste, Costa Rica with commodity Chromium
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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. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10007791
MRDS ID CS00002
Record type Site
Current site name B-8

Geographic coordinates

Geographic coordinates: -85.7569, 10.88576 (WGS84)

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

  • 300 M E OF UNNAMED PROSPECT OF MRDS REC. NO. 1. LOCATION B-8 OF JAGER (1977).

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Alteration

  • (Local) Ore Consists Of Massive And Altered, Or Laterized, Chromite. Lateritic Soil Is Less Completely Developed At This Prospect Than At Prospects Of Mrds Rec. Nos. 3-8 (Area A Of Jager (1977)).

Analytical data

Result GRADE OF 3 SAMPLES: 27.45-32.75 % CR
Result AVERAGE GRADE: 30.32 % CR

Mineral occurrence model information

Model code 15
USGS model code 8a
Deposit model name Podiform chromite (minor)
Mark3 model number none

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Nearby scientific data

(1) -85.7569, 10.88576
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Economic information

Ore body information

  • General form POD

Comments on the geologic information

  • THE CONTACT BETWEEN CHROMITE AND PERIDOTITE IS GRADATIONAL. SERPENTINIZED HARZBURGITE OVERLIES SERPENTINIZED DUNITE. DUNITE S OF THE MINERALIZED AREA IS SHEARED. A MAFIC DIKE, CONSISTING OF UNALTERED MICROGABBRO IN ITS LOWER PART AND A HIGHLY ALTERED ROCK WITH ABUNDANT PREHNITE IN ITS UPPER PART, TRENDS N 15 E AND CUTS THE PERIDOTITE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Reference information

Bibliographic references

  • Deposit

    JAGER C., GERARDO, 1977, GEOLOGIA DE LAS MINERALIZACIONES DE CROMITA AL ESTE DE LA PENINSULA DE SANTA ELENA, PROVINCIA DE GUANACASTE, COSTA RICA: TESIS DE GRADO, UNIVERSIDAD DE COSTA RICA, 136 P.

  • Deposit

    KUYPERS, E. P., AND JAGER C., G., 1979, MINERALIZACIONES DE CROMITA EN LA PENINSULA DE SANTA ELENA, COSTA RICA: CIENC. TEC., V. 3, NO. 1, P. 99-108.

  • 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.

General comments

Subject category Comment text
Deposit EXPOSED IN OUTCROP. POD CONSISTS OF SEVERAL SEPARATE BLOCKS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-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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