Helvetia-Rosemont District

Past Producer in Pima county in Arizona, United States with commodities Copper, Silver, Zinc, Tungsten, Molybdenum

Geologic information

Identification information

Deposit ID 60000203
MRDS ID D000804
Record type District
Current site name Helvetia-Rosemont District
Alternate or previous names Helvetia Deposit, Peach-Elgin, Broadtop Butte, Rosemont, Copper World
Related records 10210685

Geographic coordinates

Geographic coordinates: -110.78398, 31.86683 (WGS84)
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Geographic areas

Country State County
United States Arizona Pima

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Zinc Secondary
Tungsten Tertiary
Molybdenum Tertiary

Alteration

  • (Local) SKARNCONTACT PYROMETASOMATIC (SKARNIFICATION), SILICIFICATION, ARGILLIZATION, PYRITIZATION
  • (Local) SILICIFICATION
  • (Local) ARGILLIC
  • (Local) PYRITIZATION

Mineral occurrence model information

Model code 58
USGS model code 18a
Deposit model name Porphyry Cu, skarn-related
Mark3 model number 9

Nearby scientific data

(1) -110.78398, 31.86683

Geologic structures

Type of structure Local
Structure description BACKBONE FAULT-- A COMPLEX ZONE CONSISTING OF THRUST FAULTS, HIGH-ANGLE NORMAL AND REVERSE FAULTS, TEAR FAULTS; FOLDING

Controls for ore emplacement

  • Lithology: LITHOLOGY, INTRUSIONS

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Discovery year <1861
Year of first production >1870

Mining district

District name HELVETIA-ROSEMONT DISTRICT

Ownership information

  • Type Owner
    Owner AMERICAN SMELTING AND REFINING COMPANY (ASARCO)
    Year 1992

Reference information

Bibliographic references

  • Deposit

    LEMMON, D.M., UNPUBLISHED DATA.

  • Deposit

    LEMMON, D.M., AND TWETO, O.L., 1962, TUNGSTEN IN THE U.S., USGS MAP, MR-25.

  • Deposit

    SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: U.S. BUREAU OF MINES SPECIAL PUBLICATION, 334 P.

  • Deposit

    ANZALONE, S.A., AND BROWN, R.L., 1992, GEOLOGYOF THE HELVETIA COPPER DEPOSIT--ARIZONA: SOCIETY FOR MINING, METALLURGY, AND EXPLORATION, INC. PREPRINT NO. 92-61, 5 P.