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Rialto Group

Past Producer in Yuma county in Arizona, United States with commodities Lead, Copper, Silver, Fluorine-Fluorite, Gold, Molybdenum, Vanadium, Barium-Barite
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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. Ownership information
  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 10103550
MRDS ID M030326
Record type Site
Current site name Rialto Group
Alternate or previous names Hull Mine Group, Chief of Dome, Diana, Hull & Surprise Claims,, Douglas, Railroad, Pocahontas, Castle Dome Mine Group
Related records 10186691

Geographic coordinates

Geographic coordinates: -114.17856, 33.06035 (WGS84)
Elevation 427
Relative position 4 MI SW OF CASTLE DOME PEAK.

Site location context

Political divisions (FIPS codes)

Yuma(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Castle Dome Peak(quadrangle 1:24,000 scale)

Trigo Mountains(quadrangle 1:100,000 scale)

Salton Sea(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Gila(hydrologic unit)

Lower Gila(hydrologic accounting unit)

Lower Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Yuma

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 004S 019W 24,25 SW4 (24); CENTER OF N (25) Arizona

Comments on the location information

  • ON W SIDE OF THE CASTLE DOME MOUNTAINS; ABOUT 3 MI N OF CASTLE DOME MINE. INFO FROM LAND.ST :1964

Commodities

Commodity Importance
Lead Primary
Copper Primary
Silver Primary
Fluorine-Fluorite Critical Secondary
Gold Secondary
Molybdenum Tertiary
Vanadium Critical Tertiary
Barium-Barite Critical Tertiary

Materials information

Materials Type of material
Fluorite Ore
Mimetite Ore
Vanadinite Ore
Wulfenite Ore
Barite Gangue
Calcite Gangue

Alteration

  • (Local) Strong Sericitization, Also Silicification, Chloritization

Analytical data

Result ABOUT 8333 TONS OF ORE AVERAGING 5% PB, 2% CU, 1.96% OZ/T AG, MINOR AU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Kofa Volcanics
    Rock description Kofa Volcanics
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -114.17856, 33.06035
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Block Faulting

Ore body information

  • General form IRREGULAR MASES, LENSES
    Strike N30W
    Dip 70 NE
    Length 609.6M
    Width 3.66M
    Depth to bottom 91.44M

Controls for ore emplacement

  • Fault Zone Containing Intersecting Faults & Gouge

Comments on the geologic information

  • COVERED BY GRAVEL ON PEDIMENT.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No

Mining district

District name Castle Dome District

Land status

Ownership category Federal
Area name Kofa Game Range

Ownership information

  • Type Owner
    Owner G. Hull
    First year 1933

Comments on the production information

  • MOST ORE MINED PRIOR TO 1900 BUT FILL & DUMPS WORKED TO 1960. MAS F PRODUCTION IS ESTIMATE FOR DISTRICT.

Workings at the site

  • Type of workings Underground
    Length 518.16M
    Overall depth 91.44M

Comments on the workings information

  • SEVERAL SHAFTS

Comments on development

  • PREVIOUS OWNERS INCLUDE CASTLE DOME MINING & SMELTING CO., GONDOLFO & SANQUINETTI, DE LUCE, CASTLE DOME MINING CO., HULL MINES, REALTO CO., JOPLIN LEAD CO., WALL, DESERT LEAD CO., TAYLOR; THE RIALTO-HULL GROUP IS CONSIDERED AS PART OF THE CASTLE DOME MINE GROUP.

Reference information

Bibliographic references

  • Deposit

    KEITH, 1978, ABGMT BULL 192.

  • Deposit

    WILSON, 1933, ABM BULL 134.

  • Deposit

    WILSON, 1951, ABM BULL 158.

  • Deposit

    ABGMT FILE DATA.

  • Deposit

    USBM FILE DATA CLUSTER 343, RIALTO GROUP.

  • Deposit

    ABGMT-USBM PRODUCTION FILE DATA.

  • Deposit

    VAN ALSTINE, R.E., 1969, FLUORSPAR, IN ABM BULL 180, USGS BULL 871, P. 354.

  • Deposit

    MINERALS AVAILABILITY SYSTEMS: ARIZONA FLUORSPAR, ARIZONA DMR, MARCH 1976.

  • Deposit

    PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.

  • Other Database

    CIMRI

  • Production

    KEITH, 1978, P. 120; MINERALS AVAILABILITY SYSTEM, 1976.

General comments

Subject category Comment text
Deposit VEIN FOLLOWS A FAULT ZONE IN SHALE. GREEN, PURPLE, AND ROSE COLORED FLUORITE IS ASSOCIATED WITH CALCITE, BARITE, GALENA AND WULFENITE IN VEINS WHERE METASEDIMENTS HAVE BEEN INTRUDED BY RHYOLITE AND DIORITE PORPHYRY. VEINS SPLIT AND BRANCH BUT ARE TRACEABLE FOR AS MUCH AS 4000 FT. FLUORITE ORE IS USUALLY < 5 FT THICK.
Deposit THIS REPORT WAS TAKEN FROM RECORD M030326 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEODORE, USGS. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1983 Peterson, Jocelyn A. U.S. Geological Survey
Updater 01-SEP-1991 Carbonaro, Marguerite M. U.S. Geological Survey
Updater 01-DEC-1992 Orris, Greta J. 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.