1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Mammoth

Past Producer in Shasta county in California, United States with commodities Copper, Zinc, Silver, Gold
Map
XML
JSON
KML
B
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. Mineral occurrence model information
  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. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10077557
MRDS ID W025257
Record type Site
Current site name Mammoth
Alternate or previous names Anderson, Mayflower, Sheridan, Gillispie
Related records 10286602

Geographic coordinates

Geographic coordinates: -122.45554, 40.76291 (WGS84)
Elevation 762

Site location context

Political divisions (FIPS codes)

Shasta(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bohemotash Mountain(quadrangle 1:24,000 scale)

Redding(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Sacramento Headwaters(hydrologic unit)

Upper Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Shasta-Trinity 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 California Shasta

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 034N 005W 32 California

Commodities

Commodity Importance
Copper Primary
Zinc Critical Primary
Silver Secondary
Gold Secondary

Comments on the commodity information

  • PYRITE IS MAJOR ORE COMPONENT

Materials information

Materials Type of material
Pyrite Ore

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Balaklala Rhyolite
    Rock description Balaklala Rhyolite
    Stratigraphic age (youngest) Late Devonian
    Stratigraphic age (youngest) Late Devonian

Nearby scientific data

(1) -122.45554, 40.76291
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Folds And Faults, The Principal Faults Are The California, The 12 - Drift, The Schoolhouse, The Gossan, The Friday And The Clark. All These Faults, The North Or East Side Has Moved Down Relative To The South Or West. The Horizontal Component Is Only Known For The California, It Is 250 Ft.

Ore body information

  • General form TABULAR
    Plunge 14 DEG
    Thickness 33.53M
    Length 1280.16M
    Width 304.8M

Controls for ore emplacement

  • Stratigraphic Control, Foliation, Main Arch And Minor Flexures And Location Of Feeder Fissures, (Faults And Shear Zones).

Comments on the geologic information

  • GEOL.DESC: BALAKLALA RHYOLITE IN MINED AREA CONSISTS OF PORPHYRITIC AND NONPORPHYRITIC RHYOLITE FLOWS AND INTERCALATED COARSE AND FINE RHYOLITIC PYROCLASTIC MATERIAL. ORE ZONE IS IN THE UPPERMOST PART OF THE MIDDLE UNIT, IMMEDIATELY UNDER THE BASE OF THE UPPER UNIT. LOWER UNIT CONSISTS MAINLY OF LIGHT - GRAY TO LIGHT - GREEN NONPORPHYRITIC RHYOLITE AND RHYOLITIC TUFF AND VOLCANIC BRECCIA. THE MIDDLE UNIT RANGES IN THICKNESS FROM 150 - 300 FT. IT CONSISTS OF LIGHT GRAY TO GREEN PORPHYRITIC RHYOLITE FLOWS AND PYROCLASTIC ROCKS. THE UPPER UNIT IS COARSE PORPHYRITIC RHYOLITE CONTAINING QUARTZ AND FELDSPAR PHENOCRYSTS, IT IS 1400 FT. THICK AT MAMMOTH BUTTE BUT THINS RAPIDLY TOWARD THE EAST. THE UPPER UNIT FORMS THE "CUPROCK" FOR THE ORE DEPOSITS.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Production years 1905 - 1925

Mining district

District name West Shasta Copper - Zinc

Land status

Ownership category National Forest

Production statistics

  • Year 1915
    Period 1914 - 1915
    Material ZN
    Accuracy Accurate
    Description Cp_Grade: ^21.1 % Zn, 2.4 % Cu, 5.79 Oz/Ton Ag, .078 Oz/Ton Au.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2g/mt
    Silver Silver 164g/mt
    Copper Copper 2wt-pct
    Zinc Zinc 21wt-pct
  • Year 1925
    Period 1905 - 1925
    Material CU
    Accuracy Accurate
    Description Cp_Grade: ^40.4 % S, 34.3 % Fe, 4.2 % Zn, 3.99 % Cu, 2.24 Oz/Ton Ag, .038 Oz/Ton Au.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Zinc Zinc 4wt-pct
    Iron Iron 34wt-pct
    Sulfur Sulfur 40wt-pct
    Major Gold Gold 1g/mt
    Silver Silver 63g/mt
    Copper Copper 4wt-pct

Comments on the workings information

  • MINE AREA WAS EXTENSIVELY DEVELOPED BY THOUSANDS OF FEET OF WORKINGS APPENDED TO NINE PRINCIPAL ADITS

Reference information

General comments

Subject category Comment text
Deposit ORE FORMED BY REPLACEMENT OF ROCKS IN THE UPPERMOST PART OF THE MIDDLE UNIT OF THE BALAKLALA RHYOLITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1978 Fraticelli, L. A. (Albers, J.) U.S. Geological Survey

Beyond USGS

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

External references

Maps centered on this site

Authoritative California resources

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