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  3. Mineral Resource Data System (MRDS)

Piedras Verdes

Prospect in Sonora, Mexico 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. Nearby scientific data
  7. Economic information about the deposit and operations
  8. Ownership information
  9. Reserves and resources
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10206096
MAS/MILS ID 2010490003
Record type Site
Current site name Piedras Verdes

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -109.02, 27.16838 (WGS84)
Location accuracy 100(meters)

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

Nearby scientific data

Ore Body (1) -109.02, 27.16838
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Prospect
Commodity type Metallic
Significant Yes
Mining method Open Pit
Milling method Leach-Solvent-Extract-Electrowin

Ownership information

  • Type Owner
    Owner Azco Mining Inc.
    Interest 30
    Home office Colorado
    Year 1995
    First year 1989
  • Type Owner-Operator
    Owner Phelps Dodge Corp.
    Interest 70
    Home office Arizona
    Year 1995
    First year 1995

Reserves and resources

  • Type In-situ
    Estimate year 1992
    Total resources 105000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.33 wt-pct Copper Major 1992
  • Type In-situ
    Estimate year 1992
    Total resources 95000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.34 wt-pct Copper Major 1992
  • Type In-situ
    Estimate year 1993
    Measured 62600000mt ore
    Indicated 24600000mt ore
    Demonstrated 87200000mt ore
    Total resources 87200000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.43 wt-pct Copper Major 1993
  • Type In-situ
    Estimate year 1993
    Measured 53900000mt ore
    Demonstrated 53900000mt ore
    Total resources 53900000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.46 wt-pct Copper Major 1993
  • Type In-situ
    Estimate year 1993
    Measured 19000000mt ore
    Demonstrated 19000000mt ore
    Total resources 19000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.63 wt-pct Copper Major 1993
  • Type In-situ
    Estimate year 1993
    Indicated 18700000mt ore
    Demonstrated 18700000mt ore
    Total resources 18700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.4 wt-pct Copper Major 1993
  • Type In-situ
    Estimate year 1995
    Demonstrated 140000000mt ore
    Total resources 140000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.41 wt-pct Copper Major 1995
  • Type In-situ
    Estimate year 1995
    Demonstrated 91000000mt ore
    Total resources 91000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.5 wt-pct Copper Major 1995

Reference information

Bibliographic references

  • Reserve-Resource

    INTERNATIONAL BARON RESOURCES LTD. INFORMATION CIRCULAR,

  • Reserve-Resource

    11/11/91, P.20,21.

  • Reserve-Resource

    SOUTHWESTERN PAY DIRT, 8/93, P.14A.

  • Reserve-Resource

    NORTHERN MINER, 8/23/93, P.16.

  • Reserve-Resource

    SKILLINGS', 8/7/93, P.11.

  • Reserve-Resource

    MINING RECORD, 8/11/93, P.3.

  • Reserve-Resource

    LATIN AMERICAN MINING RECORD, 4/95, P.18.

  • Reserve-Resource

    MINING RECORD, V 106/N 28, 7/12/95, P.10.

  • Deposit

    NORTHERN MINER, 8/3/92, P.16.

  • Deposit

    MINING RECORD, 9/9/92, P.9.

  • Deposit

    MINING JOURNAL, 12/4/92, P.400.

  • Deposit

    LATIN AMERICAN MINING LETTER, 12/14/92, P.5.

  • Deposit

    MINING MAGAZINE, 1/93, P.42.

  • Deposit

    NORTHERN MINER, 12/14/92, P.6.

  • Deposit

    SKILLINGS', 12/5/92, P.9.

  • Deposit

    MINING RECORD, 12/23/92, P.1.

  • Deposit

    MINING RECORD, 3/24/93, P.15.

  • Deposit

    ENGINEERING AND MINING JOURNAL, 4/93, P.8.

  • Deposit

    LATIN AMERICAN MINING LETTER, 8/25/93, P.7.

  • Deposit

    MINING MAGAZINE, 10/93, P.223.

  • Deposit

    MINING RECORD, 8/25/93, P.1.

  • Deposit

    SOUTHWESTERN PAY DIRT, 5/94, P.5B.

  • Deposit

    MINING JOURNAL, 5/13/94, P.348.

  • Deposit

    AZCO MINING INC., STATEMENT OF MATERIAL FACTS, 3/23/92,

  • Deposit

    P.25-30.

  • Deposit

    AMERICAN METAL MARKET, V 103/N 85, 5/3/95, P.2.

  • Deposit

    AMERICAN METAL MARKET, V 103/N 134, 7/14/95, P.2.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-SEP-1996 Porter, Kenneth E. U.S. Bureau of Mines

Beyond USGS

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

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Phelps Dodge Corp. — acquired by Subsidiary of Freeport-McMoRan (2007)
    Acquired by Freeport-McMoRan Copper & Gold in 2007 in what was then the largest mining-industry deal ever (~US$26 B).

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.

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