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Juana Diaz Mine

Past Producer in Puerto Rico, United States 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. Economic information about the deposit and operations
  11. Production statistics
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10085536
MRDS ID W701145
Record type Site
Current site name Juana Diaz Mine

Geographic coordinates

Geographic coordinates: -66.46475, 18.0715 (WGS84)
Relative position MINE IS LOCATED ON A PAVED ROAD ABOUT 3 KM N OF KM 115, ON THE MAIN ROAD FROM SAN JUAN TO PONCE, AND ABOUT 1 1/2 KM E OF JUANA DIAZ.

Site location context

Political divisions (FIPS codes)

Juana Díaz Municipio(county)

Puerto Rico(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rio Descalabrado(quadrangle 1:24,000 scale)

Puerto Rico C(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern(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
Manganese Critical Primary

Comments on the commodity information

  • FROM 1923 UNTIL 1939 THE COMPANY POLICY WAS TO CONCENTRATE THE ORE TO 72% MN BEFORE SHIPPING AND SELLING. THE MN WAS USED EXCLUSIVELY FOR DRY-CELL BATTERIES.

Materials information

Materials Type of material
Manganite Ore
Psilomelane Ore
Pyrolusite Ore

Analytical data

Result ORE IS VERY RICH, AVERAGING 60% MN, WITH SMALL AMOUNTS OF SILICA, FE, AND P.

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 > Carbonate > Limestone
    Rock unit name Guayabal Limestone
    Rock description Guayabal Limestone
    Stratigraphic age (youngest) Eocene

Nearby scientific data

(1) -66.46475, 18.0715
ListMap

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Year of first production 1915
Year of last production 1939

Production statistics

  • Year 1939
    Period 1915-1939
    Material ORE MN
    Accuracy Estimate
    Description Cp_Grade: ^Average 60% Mn
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Manganese Manganese 60wt-pct

Comments on the workings information

  • ALMOST ALL MINING WAS OF SURFACE TYPE WITH SOME VERY SHALLOW SUBSURFACE WORKINGS. NO ATTEMPT WAS MADE TO GET AT THE ORE AT DEPTH, AND WHEN SURFACE AND NEAR-SURFACE SUPPLIES BECAME EXHAUSTED, MINING WAS CLOSED DOWN.

Comments on development

  • MINING WENT ON UNINTERUPTEDLY FROM 1915 TO 1939, DURING WHICH TIME SOME 80,000 TONS, SOME CONCENTRATED, WERE SHIPPED TO THE UNITED STATES. FROM 1923 UNTIL 1939, THE ATLANTIC ORE CO. DEVELOPED THE MINES.

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

    MITCHELL, R. C., 1954, A SURVEY OF THE GEOLOGY OF PUERTO RICO: PUERTO RICO UNIV., AGR. EXPT. STA. TECH. PAPER 13, P. 106.

  • Deposit

    PUERTO RICO BUREAU OF MINES, 1941, REPORT OF THE BUREAU OF MINES ON THE MINERAL RESOURCES OF PUERTO RICO, AN APPENDIX TO THE ANNUAL REPORT OF THE BUREAU OF MINES FOR THE FISCAL YEARS 1939-1941: SAN JUAN, BUR. SUPPLIES, PRINTING, AND TRANSPORTATION, P. 18.

  • Production

    MITCHELL, 1954, P. 106.

General comments

Subject category Comment text
Deposit ORE OCCURS IN FISSURES IN LIMESTONE WHICH HAVE BEEN ENLARGED BY SOLUTION PROCESSES; MN IS PRESENT AS POCKETS AND LENSES. ORE IS BELIEVED TO PERSIST FOR A CONSIDERABLE DEPTH, PERHAPS 80 TO 100 FEET, AND COVERS A MUCH LARGER ACREAGE THAN WAS DEVELOPED.
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-AUG-1991 Paidakovich, Matthew E. U.S. Geological Survey

Beyond USGS

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

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