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  3. Mineral Resource Data System (MRDS)

Amelia

Producer in Sonora, Mexico with commodity Gold
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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. Controls for ore emplacement
  11. Economic information about the deposit and operations
  12. Mining district
  13. Ownership information
  14. Reserves and resources
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10049064
MRDS ID MX00280
Record type Site
Current site name Amelia
Related records 10133585

Geographic coordinates

Geographic coordinates: -110.56733, 30.61683 (WGS84)
Relative position SMALL MINING OPERATION IN THE MOUNTAINS EAST OF MAGDALENA NEAR SANTA GERTRUDIS.

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
Gold Primary

Comments on the commodity information

  • AMENABLE TO OPEN PIT MINING. PRELIMINARY METALLURGICAL TESTS INDICATE AU RECOVERIES OF 75-85% CAN BE EXPECTED FROM HEAP LEACHING OPERATION.

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 172
USGS model code 26a
Deposit model name Carbonate-hosted Au-Ag
Mark3 model number 15

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert

Nearby scientific data

(1) -110.56733, 30.61683
ListMap

Economic information

Controls for ore emplacement

  • Fault Controlled.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1987

Mining district

District name Sierra Azul

Ownership information

  • Type Operator
    Owner Minera Zapata
  • Type Owner
    Owner Phelps-Dodge (49%); Minera Zapata

Reserves and resources

  • Type In-situ
    Estimate year 1987
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.694 g/mt Gold Major 1987

Comments on the reserve resource information

  • DRILL-INDICATED RESERVES.
  • ADDITIONAL POTENTIAL FOR PROPERTIES CONTROLLED BY MINERA ZAPATA.

Comments on the workings information

  • 94 DD-HOLES DRILLED BY MINERA ZAPATA TOTALLED 23,000 FT.

Comments on development

  • BOUGHT BY PHELPS-DODGE IN 1984 AND EXPLORATION BEGUN. PRODUCTION STARTED IN JULY 1987.

Reference information

Bibliographic references

  • Deposit

    SILBERMAN, MILES AND ROLDAN, JAIME, PERSONAL COMMUNICATION TO J.M. STAUDE, 1987.

  • Deposit

    SILBERMAN, M.L., 1987, REPORT ON RECONNAISSANCE OF GOLD PROSPECTS IN NORTHERN SONORA, MEXICO: UNPUB. USGS REPORT, 6 P.

  • Deposit

    ENGINEERING AND MINING JOURNAL, 1987, V. 188, NO. 9, P. 11.

General comments

Subject category Comment text
Deposit DISSEMINATED GOLD IN JASPEROIDS ALONG HIGH-ANGLE NORMAL AND REVERSE FAULTS IN FOLDED LIMESTONE AND SANDSTONE UNIT 5-10 M THICK CAPPED BY 2-6 M CHERT LAYER. SIMILAR TO SANTA GERTRUDIS. MINERALIZATION PRIMARILY WITHIN 4 M OF HIGH-ANGLE FAULTS WITH RICHEST ORE IN THE FAULTS.

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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