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Arroyo Lobo

Occurrence in Lake 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. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10030657
MRDS ID M008961
Record type Site
Current site name Arroyo Lobo
Related records 10114751

Geographic coordinates

Geographic coordinates: -122.61496, 39.09405 (WGS84)
Relative position 4 MI. N.W. OF ARABELLA SCHOOLHOUSE, AND 40 MI. TO CALISTOGA VIA LOWER LAKE AND MIDDLETOWN.

Site location context

Political divisions (FIPS codes)

Lake(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Benmore Canyon(quadrangle 1:24,000 scale)

Lakeport(quadrangle 1:100,000 scale)

Ukiah(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Cache(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Lake

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 014N 007W 03 California

Comments on the location information

  • LOCATED IN NE 1/4 SECTION 3 UTM APPROX

Commodities

Commodity Importance
Manganese Critical Tertiary

Analytical data

Result ORE GRADE 30 PERCENT MANGANESE AND 30 PERCENT SILICA.

Nearby scientific data

(1) -122.61496, 39.09405
ListMap

Economic information

Ore body information

  • Strike N 30 W
    Dip NEAR VERTICAL
    Thickness 1.22M
    Length 22.86M

Comments on the geologic information

  • GEOL.DESC: ORE IS IN 2 ZONES OF MASSIVE RADIOLARIAN CHERT STAINED WITH MANGANESE OXIDES. THE ZONES STRIKE N 30 W AND ARE NEARLY VERTICAL. THEY ARE ENCLOSED CONFORMABLY WITHIN THIN-BEDDED RED AND GRAY CHERT.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Charles R. Dow

Comments on the production information

  • ABANDONED. NO PRODUCTION.

Reference information

Bibliographic references

  • Deposit

    CALIF. B. 125, 1943, P. 124

  • Deposit

    CALIF. BULL.152, P. 87

General comments

Subject category Comment text
Deposit THE THICKNESS OF THE ORE BED RANGES FROM 2 TO 4 FEET AND THE EXPOSURES HAVE A TOTAL LENGTH OF 75 FEET. AVERAGE GRADE IS ESTIMATED TO BE 30% MANGANESE AND 30% SILICA.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1977 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.