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Seeley Group

Past Producer in San Luis Obispo county in California, United States with commodities Chromium, Iron
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Production statistics
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10116980
MRDS ID M100582
MAS/MILS ID 0060790343
Record type Site
Current site name Seeley Group
Alternate or previous names Ore Bag Claim, Seeley-Miller Property, Spring Creek Nos. 1-4 Claims, Trout Creek Nos. 1-4 Claims, Crown Point Claim, Outpost Nos. 1 and 2 Claims
Related records 10043683

Geographic coordinates

Point of reference Trench
Geographic coordinates: -120.67707, 35.37167 (WGS84)
Elevation 768
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

San Luis Obispo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Luis Obispo(quadrangle 1:24,000 scale)

San Luis Obispo(quadrangle 1:100,000 scale)

San Luis Obispo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salinas(hydrologic unit)

Central California Coastal(hydrologic accounting unit)

Central California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Los Padres 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 San Luis Obispo

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 029 S 012 E 27 NESESW California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

Materials Type of material
Chromite Unknown
Olivine Unknown
Pyroxene Unknown
Serpentine Unknown

Nearby scientific data

Trench (1) Lower Cretaceous marine rocks
ListMap

Economic information

Ore body information

  • Strike N65W
    Dip 38S
    Thickness 6M
    Length 170M
    Width 10M
    Area 2HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 LENTICULAR
    Shape of Orebody #2 TABULAR
    Shape of Orebody #3 IRREGULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Secondary Ore Control FRACTURING
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Strike And Dip N65W:38S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 2
    Date of Last Modification 830316

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1880
Year of first production 1880

Mining district

District name Cuesta Pass

Mineral rights holdings

Type of mineral rights Other

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner U.S. Forest Service - Los Padres National Forest
    Interest 100
    Home office California
    Year 1976
  • Type Operator
    Owner San Luis Mining Co.
    Home office California
    Year 1976
    Last year 1955

Production statistics

  • Year 1917
    Description Lump And Milling Ore From 1917-1919 500 Mt
  • Year 1953
    Description Lump Ore Produced From 1953 To 1955. 15 Mt @ 47 Pct/2.1:1 Cr:Fe
  • Year 1953
    Description Concentrates Produced From 1953 To 1955 1050 Mt @ 45.6 Pct/2.2:1 Cr8fe
  • Year 1953
    Description Ore Mined From 1953 To 1955 5140 Mt @ 11.5 Pct

Reserves and resources

  • Type In-situ
    Estimate year 1944
    Indicated 22500mt ore
    Demonstrated 22500mt ore
    Inferred 33800mt ore
    Total resources 56300mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 5 wt-pct Chromium Trace 1944
    Iron Fe 1 wt-pct Iron Trace 1944

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit ORE RESERVE ESTIMATES FROM SMITH AND GRIGGS,USGS BULL.945-B, 42-43 ORE BODY SIZE AND ORIENTATION FOR WESTERN ORE BODY AT L CLAIMS. MILL ORE RAN 11.3% CR2O3.CONC RAN 45.6% CR2O3,14% FE=2.2,MASSIVE RAN 47% CR2O3,15%FE,CR/FE=2.1 TOTAL PRODUCTI OX 1051 LT CONC & 16 LT LUMP (5140 LT ORE MILLED) INADEQUATE RESOURCES FOR COST ANALYSIS. ANALYSIS BY CDMG IN 1976 GAVE FOLLOWING PERCENTAGES-MASSIVE 2 04.50,CR2O3 46.77,FEO 20.05,TOTAL FE 26.37,AL203 09.45,MGO CR/FE 1.56.DISSEMINATED ORE=SI02 04.16,CR2O3 55.54,FEO 13.73 FE 18.65,AL203 07.56,MGO 13.02,CR/FE 2.62.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1992 Wetzel, Nicholas U.S. Bureau of Mines

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.