Gatti Prospect

Past Producer in Puerto Rico, United States with commodity Manganese
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. Controls for ore emplacement
  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 10100553
MRDS ID W701085
Record type Site
Current site name Gatti Prospect

Geographic coordinates

Geographic coordinates: -66.73391, 18.13095 (WGS84)
Relative position SOUTHEAST OF LAGO GARZAS

Site location context

Political divisions (FIPS codes)

Adjuntas Municipio(county)

Puerto Rico(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Adjuntas(quadrangle 1:24,000 scale)

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

Hydrologic units (watersheds)

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

  • THE ORE WAS SOLD FOR METALLURGICAL USES.

Materials information

Materials Type of material
Psilomelane Ore
Rhodonite Ore
Calcite Gangue
Epidote Gangue
Quartz Gangue

Alteration

  • (Local) Both Tuff And Lava Are Deeply Weathered

Analytical data

Result THE ORE TAKEN OUT FROM THE WORKINGS WAS SORTED INTO TWO CLASSES. THE HIGH-GRADE ORE TOGETHER WITH SOME GATHERED FROM THE DIFFERENT PROSPECTING PITS WAS SHIPPED. THE LOT CONSISTED OF ABOUT 120 TONS AND IS SAID TO HAVE THE FOLLOWING ANALYSIS: MANGANESE, 52.00%
Result IRON, 0.25%
Result SILICA, 6.75%.

Mineral occurrence model information

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

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic)
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff
    Rock unit name Lago Garzas Formation
    Rock description Lago Garzas Formation
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Tuff

Nearby scientific data

(1) -66.73391, 18.13095

Economic information

Controls for ore emplacement

  • Prospect Located About At Contact Of A Tuff With An Underlying Lava

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the workings information

  • A 35-FOOT SHAFT, A 109-FOOT DRIFT, A 20-FOOT WINZE, AND ABOUT 40 PROSPECTING PITS.

Comments on development

  • MINE. WORK STARTED IN 1932, AND EVENTUALLY STOPPED DUE TO FLOODING AND TRANSPORTATION DIFFICULTY.

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

    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. 20-21.

  • Deposit

    MATTSON, P. H., 1968, GEOLOGIC MAP OF THE ADJUNTAS QUADRANGLE, PUERTO RICO: U. S. GEOLOGICAL SURVEY MISC. GEOL. INV. MAP I-519.

  • Production

    PUERTO RICO BUREAU OF MINES, 1941.

General comments

Subject category Comment text
Deposit VEIN VARYING FROM 2 TO 6 FEET IN WIDTH.
Deposit [PREVIOUS UPDATERS: BAWIEC, WALTER J., 90 08, USGS; SCHELLEKENS, J.H., 91 07, UPR.]

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.