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Piedra Hueca Deposit

Occurrence in Puerto Rico, United States with commodity Copper
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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. Geologic structures
  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 10085480
MRDS ID W701071
Record type Site
Current site name Piedra Hueca Deposit

Geographic coordinates

Geographic coordinates: -66.68614, 18.19788 (WGS84)

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
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Magnetite Ore
Chlorite Gangue
Pyrite Gangue

Alteration

  • (Local) Biotitic, Weak Propylytic, Without Plagioclase Destruction

Mineral occurrence model information

Model code 78
USGS model code 20c
Deposit model name Porphyry Cu-Au
Mark3 model number 34

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -66.68614, 18.19788
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Deposit Is Only Weakly Fractured

Comments on the geologic information

  • STOCK LIES SOUTH OF THE UTUADO BATHOLITH IN A NORTHWEST TRENDING ZONE OF HYDROTHERMALLY ALTERED CRETACEOUS AND EOCENE VOLCANICS. A MAJOR FAULT WITHIN THE ALTERATION ZONE SEPARATES THE EOCENE AND CRETACEOUS ROCKS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Medium
Significant No

Comments on the reserve resource information

  • THE PIEDRA HUECA DEPOSIT AND THE CALA ABAJO DEPOSIT (600 METERS AWAY) TOGETHER CONTAIN 104 MILLION TONS OF ORE AVERAGING 0.82% COPPER (BRADLEY, 1971).

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit PORPHYRY IS OVAL SHAPED (450 X 250 METERS).
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-SEP-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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