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Davenport and Smith Property

Occurrence in Santa Clara county in California, United States with commodity Manganese
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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. Alteration
  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. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10033587
MRDS ID M020188
Record type Site
Current site name Davenport and Smith Property
Related records 10165176

Geographic coordinates

Geographic coordinates: -121.51769, 37.47492 (WGS84)
Relative position 1/2 MI. FROM A POINT ON THE ARROYO MOCHO ROAD, WHICH IS 25 MI. S. E. OF LIVERMORE. ON THE S. SLOPE OF A RIDGE.

Site location context

Political divisions (FIPS codes)

Santa Clara(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Eylar Mountain(quadrangle 1:24,000 scale)

San Jose(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Santa Clara

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 005S 004E 27 NE California

Comments on the location information

  • LOCATED IN NE 1/4 SECTION 27

Commodities

Commodity Importance
Manganese Critical Primary

Alteration

  • (Local) Oxidation

Analytical data

Result 20 TO 25 PERCENT SILICA

Mineral occurrence model information

Model code 98
USGS model code 24c.1
Deposit model name Volcanogenic Mn, Franciscan

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Franciscan Complex (L. To L.);Franciscan Complex (L. To L.)
    Rock description Franciscan Complex (L. To L.);Franciscan Complex (L. To L.)

Nearby scientific data

(1) -121.51769, 37.47492
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Ophiolitic Melange

Ore body information

  • Strike N 50 W
    Dip 25 TO 75 S. W.
    Thickness 1.83M

Controls for ore emplacement

  • Sedimentary Bedding

Comments on the geologic information

  • GEOL.DESC: MASSIVE BED OF SILICEOUS MANGANESE OXIDE STRIKES N. 50 W. AND DIPS 25 TO 75 S. W. BED IS BROKEN BY MINOR SHEARING, SO RELATIONS TO COUNTRY ROCK ARE UNCLEAR. WHERE UNDISTURBED IT LIES PARALLEL TO BEDDING OF ENCLOSING CHERTS AND SHALES. ORE BODY AVERAGES 2 1/2 THICK, TO MAXIMUM OF 6 FT. SEVERAL THIN ORE BEDS ARE IN THE SHALE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 P. 249

  • Deposit

    D.O.M. BULL. 125 1943 P. 176

Reporter information

Type Date Name Affiliation Comment
Editor 14-MAR-1994 Mosier, D.L. U.S. Geological Survey CORRECTED LAT.-LONG., SEC. FRACTIONS, DEPOSIT TYPE, COMMODITIES. ENTERED HOST ROCK TYPE AND AGE, TECTONIC SETTING, REGIONAL STRUCTURE, ALTERATION, CONC/ENRICH, MINERALIZATION AGE, USGS MODEL NAME.
Reporter 01-JAN-1978 Killman, K.; 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.