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

Lotzen Ranch

Occurrence in Nevada county in California, United States with commodity Copper
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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. Mining district
  13. Ownership information
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10095111
MRDS ID M010835
Record type Site
Current site name Lotzen Ranch

Geographic coordinates

Geographic coordinates: -121.16437, 39.09156 (WGS84)
Elevation 320
Relative position 10 MILES SW OF GRASS VALLEY

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Wolf(quadrangle 1:24,000 scale)

Yuba City(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Bear(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Nevada

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 014N 007E 02 California

Commodities

Commodity Importance
Copper Tertiary

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -121.16437, 39.09156
ListMap

Economic information

Ore body information

  • Strike N 30 W
    Dip 85 SE
    Thickness 4.88M

Comments on the geologic information

  • GEOL.DESC: FOOT WALL IS GRANODIORITE, HANGING WALL IS DIORITE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Spenceville

Ownership information

  • Type Operator
    Owner Lotzen, William
    First year 1908

Workings at the site

  • Type of workings Underground
    Length 18.29M

Comments on the workings information

  • 60 FT. ADIT CROSSCUT. 16 FT. OF WHICH IS IN MINERALIZED DIORITE

Reference information

Bibliographic references

  • Deposit

    AUBURY, L.E., 1908 , COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 204

  • Deposit

    MAC BOYLE, E., 1918 , MINES AND MINERAL RESOURCES OFNEVADA COUNTY; 16 TH REPT. STATE MIN.; CALIF. MIN. BUR., P. 86

  • Deposit

    CALIF. JOUR. MINES & GEOLOGY, V. 37, NO. 3, JULY 1941, P. 456

General comments

Subject category Comment text
Deposit GOSSAN OF IRON-STAINED DIORITE AND LIMONITE
Deposit COMPRISED OF 158 ACRES.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-NOV-1978 Fraticelli, L. A. (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.