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

Roupe Property

Past Producer in Sierra county in California, United States with commodity Chromium
Map
XML
JSON
KML
C
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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Production statistics
  17. Reserves and resources
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10043630
MRDS ID M100439
Record type Site
Current site name Roupe Property
Alternate or previous names Camptonville Property, Big Chance, Big Chrome

Geographic coordinates

Geographic coordinates: -120.99382, 39.48294 (WGS84)
Elevation 1265
Location accuracy 1000(meters)
Relative position Assumed Spot Center, Se, Sect. 30.

Site location context

Political divisions (FIPS codes)

Sierra(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pike(quadrangle 1:24,000 scale)

Truckee(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Yuba(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Sierra

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 019N 009E 30 SE California

Comments on the location information

  • PROPERTY APPROX. 100 FT FROM THE ROAD BETWEEN CAMPTONVILLE AND BRANDY CITY, CA.

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result ORE AVGERAGED 42-44% CR203

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -120.99382, 39.48294
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Serpentine Is Highly Sheared.

Ore body information

  • General form LENSE
    Strike N 36 W
    Dip 80 SW
    Thickness 1.52M
    Length 4.57M
    Width 3.05M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1914
Year of last production 1942

Mining district

District name Brandy City Area

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Roupe, R. J. And W. B.
    Home office Camptonville, Ca.
    First year 1942

Production statistics

  • Year 1917
    Period 1914-1917
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^42-43% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 43wt-pct

Reserves and resources

  • Type In-situ
    Estimate year 1942
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 44 wt-pct Chromium Major 1942

Comments on the reserve resource information

  • CDMG BULL 134, PT. 3, CHAPT. 5, P. 259

Comments on the workings information

  • WORKINGS CONSISTED OF 22 SMALL OPEN CUTS AND 3 SHALLOW SHAFTS. (1942)

Reference information

Bibliographic references

  • Deposit

    RYNEARSON, G.A., 1953, CDMG BULL 134, PT. 3, CHAPT. 5, P. 258, 259, 317

  • Production

    CDMG BULL 134, PT. 3, CHAPT. 5, P. 259

General comments

Subject category Comment text
Deposit TWENTY OR MORE ORE BODIES FOUND SCATTERED FOR APPROX. 700 FT ALONG AN IRREGULAR ZONE WITH ABOVE ATTITUDES. EACH ORE BODY AVERAGES THE ABOVE DIMENSIONS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-82 Oster, Karel L. (Albers, John P.) 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.