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

Ironsides

Past Producer in Sierra county in California, United States with commodities Gold, Lead
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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10086574
MRDS ID X025543
Record type Site
Current site name Ironsides
Related records 10189837

Geographic coordinates

Geographic coordinates: -120.76075, 39.50378 (WGS84)
Elevation 1524
Relative position 4 1/2 MI. SE OF DOWNIEVILLE.

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Downieville(quadrangle 1:24,000 scale)

Portola(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe 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 Sierra

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 019N 011E 20 California

Comments on the location information

  • UTM ACC. NE 1/4

Commodities

Commodity Importance
Gold Primary
Lead Tertiary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -120.76075, 39.50378
ListMap

Economic information

Ore body information

  • Thickness 4.88M

Comments on the geologic information

  • PARALLEL VEINS, THICKNESS FROM SMALL STRINGERS TO 16 FT. THICK FISSURE VEIN FILLING CUTTING THE STRIKE OF COUNTRY RX. FT. & HANGING WALLS ARE EITHER SLATE OR PORPHYRY. AT LEAST 3 ORE SHOOTS FROM 32 TO 200 FT. WIDE & FROM 3 FT.-12 FT. WIDE.

Economic information about the deposit and operations

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

Comments on the production information

  • NO OTHER PRODUCTION RECORD FOUND.

Workings at the site

  • Type of workings Surface/Underground
    Area 64.752HA
    Overall depth 21.64M
    Overall length 2286M

Comments on the workings information

  • 3 ADITS, UPPER ADITS 80 FT. TO VEIN, 240 FT. DRIFT & STOPE 72 FT. TO SURFACE. OTHER DRIFTS OF 800 FT. FROM 2 LOWER SHORT ADITS. SURFACE CUTS.

Reference information

Bibliographic references

  • Deposit

    AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO.: CDM CALIF. JOUR. MINES AND GEOL., VOL. 38 , NO. 1 , P. 58.

  • Deposit

    MCCULLOCH, W. C., OESTERLING, W. A., SPURCK, W. H., & TISCHLER, M. S., 1964 , MINERALS FOR INDUSTRY, N CALIF.: SO PACIFIC COMPANY, VOL. 2 , P. 48.

  • Deposit

    MACBOYLE, E., 1920 , MINES AND MINERAL RESOURCES SIERRA CO.: CSMB 16TH REPORT STATE MINERALOGIST, DEC. 1918 , P. 93 , 94.

  • Production

    MACBOYLE, 1920

General comments

Subject category Comment text
Deposit VEINS, ORE SHOOTS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1979 Hayden, F. (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.