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Mammoth Group

Past Producer in Pinal county in Arizona, United States with commodities Gold, Molybdenum, Manganese, Silver, Copper
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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. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  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 10102469
MRDS ID M002831
Record type Site
Current site name Mammoth Group
Alternate or previous names Young Mines

Geographic coordinates

Geographic coordinates: -111.48821, 33.45841 (WGS84)
Location accuracy 1000(meters)
Relative position 2 MI ESE OF SADDLE ROCK; E OF GOLDFIELD, Estimated From Shafts On Topo Map

Site location context

Political divisions (FIPS codes)

Pinal(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Goldfield(quadrangle 1:24,000 scale)

Mesa(quadrangle 1:100,000 scale)

Mesa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Gila(hydrologic unit)

Middle Gila(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management AZ)

Bureau of Land Management AZ BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Arizona Pinal
United States Arizona Maricopa

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 001N 008E 01 Arizona

Comments on the location information

  • INFO FROM LAND.ST :1979

Commodities

Commodity Importance
Gold Primary
Molybdenum Tertiary
Manganese Critical Tertiary
Silver Tertiary
Copper Tertiary

Materials information

Materials Type of material
Limonite Gangue
Quartz Gangue

Alteration

  • (Local) All Mined Material Was Oxidized

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -111.48821, 33.45841
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description 2 N-Trending, Steeply W Dipping Faults

Controls for ore emplacement

  • N-S Fault Planes & Se-Nw Fractures

Comments on the geologic information

  • TERT VOLCANIC FIELDS ARE ADJACENT TO THIS MINE, BOTH NW & SE OF TH E DRAINAGE WHERE IT IS LOCATED

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Year of first production 1893
Year of last production 1978

Mining district

District name Goldfield District

Land status

Ownership category Private

Workings at the site

  • Type of workings Underground
    Overall depth 304.8M
    Overall length 377.95M

Comments on the workings information

  • WIDTH BELOW THE 426 FT LEVEL RANGES FROM 16-36 FT, ALL WORKED FOR 1240 FT LENGTH. WORKED EXTENSIVELY TO 200 FT LEVEL BEFORE 1914

Comments on development

  • OPERATORS INCLUDED YOUNG MINES CO, GOLDFIELD MINES, E.L. JONES, E .H. SHUMWAY, HEBNER & FUNK; OPEN 1893-1894 WHEN A FLOOD BURIED WORKING S. BOUGHT BY G.U. YOUNG IN 1914. SPORADIC OPERATION UNTIL 1929. RECENT CYANIDE LEACHING. 88 CLAIMS IN 1920

Reference information

Bibliographic references

  • Deposit

    WILSON, ET AL, 1934, ABM BULL 137

  • Deposit

    JOHNSON, 1972, USGS BULL 1355, 103 P.

  • Deposit

    TENNEY, 1927-29, HISTORY OF MINING IN ARIZONA, SPECIAL COLLECTION, UNIV OF AZ LIBRARY & ABM LIBRARY, P. 344-45

  • Deposit

    ABM FILE DATA

General comments

Subject category Comment text
Deposit THIS REPORT REPRESENTS A MERGER OF ORIGINAL RECORD M002831 WITH RE CORD M002831 OF JAN WILT IN MOLYBDENUM FILE, CONTACT PERSON T.G. THEOD ORE, USGS ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-83 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.