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Calvert Prospects

Past Producer in Pima county in Arizona, United States with commodity Tungsten
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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. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Production statistics
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10039482
MRDS ID M050146
Record type Site
Current site name Calvert Prospects
Alternate or previous names Nelsons Pride Mine, Terry Marie Nos 1 & 2 Prospects
Related records 10161644

Geographic coordinates

Geographic coordinates: -111.69098, 31.95123 (WGS84)
Elevation 945
Relative position ABOUT 2 MILES NORTH OF SAN JUAN SPRING.

Site location context

Political divisions (FIPS codes)

Pima(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Juan Spring(quadrangle 1:24,000 scale)

Sells(quadrangle 1:100,000 scale)

Nogales(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Simon Wash(hydrologic unit)

Rio Sonoyta(hydrologic accounting unit)

Sonora(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

BIA(Federal land areas administered by BIA)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 17S 06E 13 Arizona

Comments on the location information

  • UNSURVEYED; LOCATION PROJECTED BY U.S.B.M. ON SKETCH MAP.

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore
Zircon Gangue

Alteration

  • (Local) Epidote And Manganese Oxides Occur On Fracture Planes.

Analytical data

Result SAMPLES FROM PITS ASSAYED 0.01% WO3, & 0.019% WO3., SAMPLE ACROSS LENGTH OF FACE OF OPEN CUT ASSAYED 0.037% WO3

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -111.69098, 31.95123
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Rocks Strike S 30 E, Dip 80 Sw.

Ore body information

  • Strike S 70 E
    Dip 80 N

Controls for ore emplacement

  • Shear Zone With Closely Spaced Fractures

Comments on the geologic information

  • FORMATION IS SOMEWHAT SCHISTOSE, FELDSPATHIC, QUARTZITIC ROCK

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1953
Discoverer Walter N. Calvert (Nelsons Pride); Eugene D. Calvert (Terry Marie)
Year of first production 1955
Production years 1955

Production statistics

  • Year 1955
    Material CONC W
    Accuracy Estimate
    Description Ap_Grade: ^50% Wo3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Wo3 Conc. Tungsten Tungsten 50wt-pct

Comments on the production information

  • (1) PRODUCED FROM (2).; NO PRODUCTION FROM TERRY MARIE

Workings at the site

  • Type of workings Surface/Underground
    Area 0.007HA
    Overall length 7.62M

Comments on the workings information

  • PITS, ONE SHAFT, ONE DIAMOND-DRILLED HOLE.; ONE OPEN CUT

Reference information

Bibliographic references

  • Deposit

    DALE, STEWART, AND MCKINNEY, 1960, TUNGSTEN DEPOSITS OF COCHISE, PIMA, AND SANTA CRUZ COUNTIES,: U.S.B.M. R.I. 5650

  • Deposit

    1956 RECON USBM, RI 5650.

  • Deposit

    DALE, STEWART, AND MCKINNEY, 1960, TUNGSTEN DEPOSITS OF COCHISE, PIMA, AND SANTA CRUZ COUNTIES: U.S. BUREAU OF MINES R.I. 5650.

  • Production

    DALE, ETAL, 1960, USBM RI 5650

General comments

Subject category Comment text
Deposit Discovery Year: 1953; 1954

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1972 Johnson, Maureen G. U.S. Geological Survey

Beyond USGS

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

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.