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

Crown Point Con. Qtz.

Past Producer in Nevada county in California, United States with commodities Gold, Lead, Silver, Copper
Map
XML
JSON
KML
B
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. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10101252
MRDS ID C011236
Record type Site
Current site name Crown Point Con. Qtz.
Alternate or previous names Confidence, Wm. Penn
Related records 10139794

Geographic coordinates

Geographic coordinates: -121.05271, 39.21989 (WGS84)
Elevation 762
Relative position NE GRASS VALLEY

Site location context

Political divisions (FIPS codes)

Nevada(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Grass Valley(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 016N 008E 26 California

Commodities

Commodity Importance
Gold Primary
Lead Secondary
Silver Secondary
Copper Secondary

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Calcite Gangue
Quartz Gangue

Analytical data

Result ONE ASSAY OF 17.5 OZ AU/TON 12 OZ AG/TON

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Calaveras Complex;Calaveras Complex
    Rock description Calaveras Complex;Calaveras Complex

Nearby scientific data

(1) -121.05271, 39.21989
ListMap

Economic information

Ore body information

  • Strike N 40 W
    Dip 70 - 80 N
    Thickness 2.13M
    Depth to top 0M

Comments on the geologic information

  • HANGING WALL CALAVERAS SLATE, FOOTWALL ALTERED SERPENTENIZED DIABASE PORPHYRITE. CROWN POINT VEIN CARRIES MAGNETITE, PYRRHOTITE - ONLY HYPOTHERMAL VEIN IN GRASS VALLEY AREA

Economic information about the deposit and operations

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

Mining district

District name Grass Valley

Comments on the production information

  • EARLY PRODUCTION $130,000 , AVG. $17 AU/TON & 3 % SULFIDES AT $60 AU/TON

Workings at the site

  • Type of workings Underground
    Length 762M
    Overall depth 188.98M

Comments on the workings information

  • INCLINE & DRIFTING

Reference information

Bibliographic references

  • Deposit

    LOGAN, C. A., 1941 , MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37 , NO. 3 , PL. 3 , P. 390 - 391 .

  • Deposit

    MACBOYLE, E., 1919 , MINES AND MINERAL RESOURCES OF NEVADA COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 16 , P.

  • Deposit

    IRELAND, W., JR., 1888 , REPORT OF THE STATE MINERALOGIST: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, VOL. 8 , P. 429 - 430 .

  • Deposit

    JOHNSTON, W. D., 1940 , THE GOLD QUARTZ VEINS OF GRASS VALLEY, CALIFORNIA: US GEOLOGICAL SURVEY PROFESSIONAL PAPER 194 , P. 24 , 93 .

General comments

Subject category Comment text
Deposit VEIN, FEW IN - 7 FT. THICK, 2 - 3 % SULFIDES
Deposit PATENTED 18.86 ACRES ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Bowman, J. And Albers, J. U.S. Geological Survey PARSED HOST ROCK AND ASSOCIATED ROCK INFORMATION FROM OLD SINGLE VALUED FIELD TO NEW MULTIVALUED FIELD
Editor 27-APR-1995 Mosier, Dan 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.