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  3. Mineral Resource Data System (MRDS)

Granada

Past Producer in Napa county in California, United States with commodity Mercury
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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. Ownership information
  16. Production statistics
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10040791
MRDS ID M055662
Record type Site
Current site name Granada
Alternate or previous names Toyon, Switzer

Geographic coordinates

Geographic coordinates: -122.50607, 38.6746 (WGS84)
Elevation 366
Relative position 20 MI N OF ST. HELENA

Site location context

Political divisions (FIPS codes)

Napa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Detert Reservoir(quadrangle 1:24,000 scale)

Healdsburg(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Napa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 010N 006W 27,34,35 California

Comments on the location information

  • LOCATED ON NORTHERN ADIT

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Hydrothermal Alteration Of Sediments

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Siltstone
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -122.50607, 38.6746
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Local Fracturing

Controls for ore emplacement

  • Fault Zones

Comments on the geologic information

  • ANDESITE FLOWS NEARBY MAY HAVE ONCE COVERED MINE AREA

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1929
Production years 1933 - 1937, 1939, 1941 - 1942

Mining district

District name East Mayacmas

Ownership information

  • Type Owner
    Owner H. M. Simmons

Production statistics

  • Year 1960
    Period To 1960
    Material HG
    Accuracy Estimate
    Description Cp_Grade: ^10 Lb/Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Mercury Mercury 4518g/mt

Workings at the site

  • Type of workings Underground
    Length 457.2M
    Overall depth 51.82M

Reference information

Bibliographic references

  • Deposit

    HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252

  • Deposit

    BAILEY, E. H., USGS, PERSONAL FILES

  • Deposit

    YATES, R. G. AND HILPERT, L. S., 1946, QUICKSILVER DEPOSITS OF THE EASTERN MAYACMAS DISTRICT, LAKE AND NAPA COUNTIES, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, P. 231 - 286

  • Deposit

    RANSOME, A.L. AND KELLOGG. J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-558

  • Deposit

    1955 DIREXPL DMEA , FOUND MINERALIZATION BUT OF UNECONOMIC GRAD

  • Production

    USBM DATA

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1976 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 California resources

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