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  3. Mineral Resource Data System (MRDS)

Piedras Verdes

Past Producer in Sonora, Mexico with commodities Copper, Molybdenum
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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. Mining district
  14. Reserves and resources
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10048957
MRDS ID MX00145
Record type Site
Current site name Piedras Verdes

Geographic coordinates

Geographic coordinates: -109.02004, 27.16834 (WGS84)
Relative position 50KM E OF NAVOJOA, 10 KM N OF PROMONTORIO AND LA QUINTERA.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

Geographic areas

Country State
Mexico Sonora

Commodities

Commodity Importance
Copper Primary
Molybdenum Secondary

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Molybdenite Ore
Pyrite Ore

Alteration

  • (Local) Sericite

Analytical data

Result 3-4% CU, (PEARCE, 1910).

Mineral occurrence model information

Model code 53
USGS model code 17
Deposit model name Porphyry Cu
Mark3 model number 4

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
    Rock unit name Barranca Formation
    Rock description Barranca Formation
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -109.02004, 27.16834
ListMap

Economic information

Ore body information

  • General form STOCKWORK

Comments on the geologic information

  • GRANODIORITE INTRUDED INTO QUARTZITE OF THE BARRANCA FM. COUNTRY ROCK (ACCORDING TO PEARCE, 1910): LEACHED RED SCHISTS WITH CU-CARBONATE STAINING AND SERIES OF QUARTZITE STRATA INTRUDED BY NUMEROUS DIORITE BODIES; NEAR CONTACT WITH GRANITIC PLUTON.

Economic information about the deposit and operations

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

Mining district

District name Alamos

Reserves and resources

  • Type In-situ
    Estimate year 1985
    Total resources 29081250000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.73 wt-pct Copper Major 1985

Comments on the reserve resource information

  • FROM DATA TABLE.

Comments on the workings information

  • WORKINGS AS OF 1910: CONGLOMERADO SHAFT, >250 FT DEEP; 500-700 FT ADIT AT 150-FT LEVEL.

Reference information

Bibliographic references

  • Deposit

    PEREZ SEGURA, EFREN, 1985, CARTA METALOGENETICA DE SONORA 1:250000 UNA INTERPRETACION DE LA METALOGENIA DE SONORA: UNIV. OF SONORA, DEPT. OF GEOL., HERMOSILLO, MEXICO, 66 P.

  • Deposit

    PEARCE, S.L., 1910, PIEDRAS VERDES DISSEMINATED-COPPER ZONE: ENGINEERING AND MINING JOURNAL, V. 89, P. 920.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1987 Staude, John-Mark G. (Page, Norman J.) U.S. Geological Survey
Updater 01-JUN-1988 Leonard, Kenneth R. U.S. Geological Survey

Beyond USGS

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

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