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  3. Mineral Resource Data System (MRDS)

Old Mexican Group

Past Producer in Sierra county in California, United States with commodity Gold
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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. 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 10103104
MRDS ID M021722
Record type Site
Current site name Old Mexican Group

Geographic coordinates

Geographic coordinates: -120.85075, 39.53627 (WGS84)
Elevation 1524
Relative position 2 1/2 MI. SW 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 010E 03,04 California

Comments on the location information

  • UTM ACC. SW 1/4 03 SE 1/4 04

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist
    Stratigraphic age (youngest) Late Permian

Nearby scientific data

(1) -120.85075, 39.53627
ListMap

Economic information

Ore body information

  • Thickness 1.22M

Comments on the geologic information

  • 2 - 4 FT. THICK VEIN

Economic information about the deposit and operations

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

Comments on the production information

  • MINED IN MEXICAN DAYS. NO OTHER PRODUCTION RECORDS FOUND.

Workings at the site

  • Type of workings Underground
    Area 24.282HA
    Overall depth 15.24M

Comments on the workings information

  • SHALLOW HOLES ON VEIN. ADIT 170 FT. W 40 FT. BACKS; 2ND ADIT 50 FT. LONG, 50 FT. DEEPER.

Reference information

Bibliographic references

  • 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. 44 .

  • Deposit

    AVERILL, C. V., 1942 , MINES AND MINERAL RESOURCES OF SIERRA CO.: CDM CALIF. JOUR. MINES AND GEOL., VOL. 38 , NO. 1 , P. 62 .

  • Deposit

    LOGAN, C. A., 1929 , SIERRA CO.: CDMM 25TH REPORT STATE MINERALOGIST, APRIL, P. 168 , 180 .

  • Production

    LOGAN, 1929

General comments

Subject category Comment text
Deposit 3 QTZ. CLAIMS. ; INFO.SRC : 1 PUB LIT
Deposit VEIN

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.

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.