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Ridley Mine

Past Producer in Pima county in Arizona, United States with commodities Lead, Copper, Silver, Gold, Zinc, Molybdenum, Iron
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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. Mining district
  16. Land status
  17. Production statistics
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10103743
MRDS ID M050161
Record type Site
Current site name Ridley Mine
Alternate or previous names Graveyard Mine
Related records 10234887

Geographic coordinates

Geographic coordinates: -110.8104, 31.85235 (WGS84)
Elevation 1244
Relative position 1 MI SW OF HELVETIA, 28 MI SE OF TUCSON

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)

Upper Santa Cruz(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States Arizona Pima

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 018S 015E 21 SE4 Arizona

Commodities

Commodity Importance
Lead Primary
Copper Primary
Silver Primary
Gold Secondary
Zinc Critical Secondary
Molybdenum Tertiary
Iron Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Sphalerite Ore
Copper Unknown

Alteration

  • (Local) Partly Oxidized; Granodiorite Is Crushed, Altered, And Sheared

Analytical data

Result 6.5% CU, 3.5% PB, 3.0% ZN, 30 OZ/T AG, $1.50/T AU (1955)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Continental Granodiorite Porphyry;Granodiorite
    Rock description Continental Granodiorite Porphyry;Granodiorite
    Stratigraphic age (youngest) Paleocene
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -110.8104, 31.85235
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Homoclinal, Tilting And Broad Open Folds In S, Extensive Faulting I N N
Type of structure Local
Structure description Thrust And Normal Faulting/Fracture Zone; Faults Are Slickensided

Ore body information

  • General form TABULAR, BANDED
    Strike NS
    Dip 50E
    Width 1.22M

Controls for ore emplacement

  • N-S Trending Fissures, Quartz Vein In Granodiorite Porphyry, Aplite Intrusives

Comments on the geologic information

  • BETTER ORE IS IN LOWER PART OF MINE; MOLYBDENITE IN LOWER PART OF MINE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1915

Mining district

District name Helvetia-Rosemont District

Land status

Ownership category Military Reservation

Production statistics

  • Year 1929
    Period 1900-1929
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^5% Pb, 2% Cu, 40 Oz/T Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Trace Ore Silver Silver 1129g/mt
    Trace Ore Copper Copper 2wt-pct
    Trace Ore Lead Lead 5wt-pct

Comments on the production information

  • SPORADIC PRODUCTION

Workings at the site

  • Type of workings Underground
    Length 45.72M
    Overall depth 36.58M

Comments on the workings information

  • SHAFT WORKINGS, 150 FT INCLINED SHAFT AND SHORT TUNNEL WITH SHORT DRIFTS ON 50 FT AND 150 FT LEVELS

Comments on development

  • ANACONDA EXPLORED INTRUSIVE QUARTZ LATITE IN 1971 AS A POTENTIAL PORPHYRY COPPER DEPOSIT

Reference information

Bibliographic references

  • Deposit

    SCHRADER, 1915, USGS BULL 582

  • Deposit

    ABM, 1971, FIELDNOTES, V. 1, NO. 2

  • Deposit

    DREWES, 1971, USGS MAP I-613

  • Deposit

    SCHRADER, 1910, USGS BULL 430

  • Deposit

    KEITH, 1974, ABM BULL 189

  • Production

    KEITH, 1974

General comments

Subject category Comment text
Deposit THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M050161 WITH RE CORD M000630 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEOD ORE, USGS ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1983 Peterson, Jocelyn A. 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.