Guanajibo Deposit

Occurrence in Puerto Rico, United States with commodities Nickel, Iron, Cobalt, Chromium
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Reserves and resources
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10085461
MRDS ID W701052
Record type Site
Current site name Guanajibo Deposit
Related records 10255248

Geographic coordinates

Geographic coordinates: -67.16142, 18.13456 (WGS84)
Relative position NEAR THE CARIBBEAN COAST ABOUT 4 MILES SOUTH OF MAYAGUEZ.

Site location context

Political divisions (FIPS codes)

Cabo Rojo Municipio(county)

Puerto Rico(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mayaguez(quadrangle 1:24,000 scale)

Puerto Rico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Culebrinas-Guanajibo(hydrologic unit)

Puerto Rico(hydrologic accounting unit)

Puerto Rico(hydrologic subregion)

Caribbean(hydrologic region)

Geographic areas

Country State
United States Puerto Rico

Commodities

Commodity Importance
Nickel Critical Primary
Iron Primary
Cobalt Critical Primary
Chromium Critical Primary

Alteration

  • (Local) Serpentinization

Mineral occurrence model information

Model code 110
USGS model code 38a
Deposit model name Lateritic Ni

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Serpentinite
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -67.16142, 18.13456

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Large
Significant No

Reserves and resources

  • Type In-situ
    Estimate year 1959
    Commodity Subtype Grade units Group Importance Year
    Nickel Ni 0.88 wt-pct Nickel Major 1959
    Iron Fe 20.54 wt-pct Iron Major 1959
    Cobalt Co 0.08 wt-pct Cobalt Major 1959
    Chromium Cr 0.51 wt-pct Chromium Major 1959

Comments on the reserve resource information

  • ESTIMATE BASED ON CUTOFF OF 0.6% NICKEL; AVERAGE THICKNESS 16.0 FEET.

Reference information

Bibliographic references

  • Deposit

    COX, DENNIS P., AND BRIGGS, REGINALD P., 1973, METALLOGENIC MAP OF PUERTO RICO: U.S. GEOLOGICAL SURVEY, MISCELLANEOUS GEOLOGIC INVESTIGATIONS MAP I-721, ACCOMPANIED BY EXPLANATORY PAMPHLET, 6 P.

  • Deposit

    HEIDENREICH, W. L., AND REYNOLDS, B. M., 1959, NICKEL-COBALT-IRON-BEARING DEPOSITS IN PUERTO RICO: U. S. BUREAU OF MINES REPT. INV. 5532, P. 6, 31.

General comments

Subject category Comment text
Deposit A LARGE, DOME-SHAPED DEPOSIT 1/2 TO 1-1/4 MILES WIDE AND ABOUT 4 MILES LONG. IT COVERS ABOUT 1,125 ACRES. THE LATERITE AND SOFT SERPENTINE IN THE DEPOSIT AVERAGE ABOUT 21.5 AND 17.5 FEET, RESPECTIVELY, IN THICKNESS. THE ENRICHED ZONE AVERAGES 16 FEET IN THICKNESS, OF WHICH ABOUT 3.5 FEET IS LATERITE AND 12.5 FEET SOFT SERPENTINE. IN MOST PLACES THE ENRICHED ZONE BOTTOMS IN SOFT SERPENTINE, BUT IN SOME AREAS CONTINUES TO THE TOP OF THE HARD SERPENTINE.
Deposit [PREVIOUS UPDATER AND DATE: BAWIEC, WALTER J., 90 08.]

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1990 Paidakovich, Matthew E. U.S. Geological Survey
Updater 01-JUL-1991 Paidakovich, Matthew E. U.S. Geological Survey

Beyond USGS

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