1. Mineral Resources
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  3. Mineral Resource Data System (MRDS)

Falls Claim

Past Producer in Pima county in Arizona, United States with commodities Copper, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10186708
MRDS ID M000172
MAS/MILS ID 0040190223
Record type Site
Current site name Falls Claim
Alternate or previous names Coronado Nf, Part 12, Santa Rita Mt, Unit, Az, Usbm Ofr Mla 11-94.
Related records 10026769

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -110.76178, 31.83843 (WGS84)
Elevation 1767
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Helvetia(quadrangle 1:24,000 scale)

Fort Huachuca(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rillito(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Coronado National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 018 S 015 E 25 NWSE Arizona

Commodities

Commodity Importance
Copper Primary
Silver Primary

Nearby scientific data

Main Entrance (1) -110.76178, 31.83843
ListMap

Economic information

Ore body information

  • Field Value
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 LENTICULAR
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin CONT METASOMATIC
    Date of Last Modification 940719

Economic information about the deposit and operations

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

Mining district

District name Helvetia-Rosemont District

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Unknown
    Owner Lewisohn Copper Co
    Year 1959
  • Type Owner-Operator
    Owner Asarco (American Smelting And Refining Co.)
    Home office Arizona
    Year 1994
    First year 1988

Comments on the ownership information

  • FALS PATENTED CLAIM IS PART OF THE HELVETIA PROPERTY OWNED BY ASARCO (1992).

Production statistics

  • Year 1959
    Period 1958-1959
    Description 1958-59 Ore Avg 5% Cu, 0.3 Oz/T Ag 170 Tons
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 9g/mt
    Major Copper Copper 5wt-pct

Reference information

Bibliographic references

  • Deposit

    S B KEITH ARIZ BUR MINES BULL 189 P125 1974

  • Deposit

    USGS SAHUARITA QUADRANGLE

Reporter information

Type Date Name Affiliation Comment
Reporter 19-JUL-94 ADMR 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:

  • Asarco (American Smelting And Refining Co.) — acquired by Asarco LLC, subsidiary of Grupo México (2009)
    American Smelting and Refining Co. Filed Chapter 11 in 2005; acquired out of bankruptcy by Grupo México in 2009.

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.

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.