The Norcross Mine is a chromium mine located in San Luis Obispo county, California at an elevation of 1,201 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 1,201 Feet (366 Meters)
Commodity: Chromium
Lat, Long: 35.4036, -120.74310
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Norcross Mine MRDS details
Site Name
Primary: Norcross Mine
Secondary: Norcross Chrome Mine
Secondary: Biaggini Mine
Secondary: Sunrise # 3 Claim
Commodity
Primary: Chromium
Location
State: California
County: San Luis Obispo
Land Status
Not available
Holdings
Type: Private Lease
Type: Located Claim
Type: Other
Workings
Type: Underground
Ownership
Owner Name: Del Norte Chrome Ltd.
Percent: 100.0
Home Office: California
Info Year: 1987
Production
Year: 1917
Description: Concentrates Produced From 1917-1918 630 Mt @ 44 Pct
Year: 1954
Description: Ore Mined From 1954-1958 26300 Mt
Year: 1954
Description: Lump Ore Mined From 1954-1958 450 Mt @ 43.6 Pct-2.7:1 Cr:Fe
Year: 1954
Description: Concentrates Produced From 1954-1958 9700 Mt @ 45 Pct-2.4:1 Cr:Fe
Year: 1943
Description: Lump Ore Mined From 1943-1944 370 Mt @ 39 Pct With A 2.3:1
Year: 1917
Description: Lump Ore Mined 170 Mt
Year: 1917
Description: Ore Mined From 1917-1918 4080 Mt
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
Mining Method: Unknown
Year First Production: 1917
Discovery Year: 1875
Years of Production:
Organization:
Significant: N
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Unknown: Chromite
Unknown: Serpentine
Comments
Comment (Production): TOTAL PRODUCTION (OF CONCENTRATES 44 PERCENT CR2O3) PRIOR TO S 2500 TONS ORE RAN 15 PERCENT CR2O3, CR/FE=2.3 INSUFFICIENT DATA FOR MATRIX CALCULATIONS. ANALYSIS BY CDMG IN 1976 GAVE FOLLING PERCENTAGES-DISSEMINATE S102 04.33, CR2O3 53.35, FEO 11.07, TOTAL FE 13.51, AL203 12.28, 84, CR/FE 3.48.
Comment (Reserve-Resource): MAT 1 COL 1 REPRESENTS TOTAL RESOURCES. MAT 1 COL 2 REPRESENTS UPPER PIT ORE. MAT 1 COL 3 REPRESENT UPPER-MIDDLE EXTEN. MAT 1 COL 4 REPRESENTS MIDDLE PIT ORE. MAT 1 COL 5 REPRESENTS MIDDLE-LOWER EXTEN. MAT 1 COL 6 REPRESENTS LOWER PIT HG ORE. MAT 1 COL 7 REPRESENTS LOWER PIT LG ORE. MAT 1 COL 8 REPRESENTS LOWER PIT LANDSLIDE RUBBLE.
Comment (Environmental Factors): CHROMITE DEPOSITS IN THE CHORRO CREEK WATERSHED ARE NOT SULFIDES WITH POTENTIAL TO GENERATE ACID MINE DRAINAGE THOUGH THEY MAY ERODE CHROMIUM, ALUMINUM, MAGNESIUM, IRON, MANGANESE, TITANIUM, CALCIUM, SILICON, AND NICKEL TO THE WATERSHED. METALS WHICH APPEAR TO BE ERODING FROM INACTIVE MINES INCLUDE MAGNESIUM, IRON, NICKEL, AND CHROMIUM. SAN LUISITO CREEK, PENNINGTON CREEK, AND UPPER CHORRO CREEK APPEAR TO BE THE MOST HEAVILY MINE-IMPACTED TRIBUTARIES IN THE CHORRO CREEK WATERSHED.
References
Reference (Deposit): CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD, CENTRAL
Reference (Deposit): COAST REGION. SURFACE WATER DEGRADATION BY INACTIVE
Reference (Deposit): METAL MINES IN NORTHWEST SAN LUIS OBISPO COUNTY, CA,
Reference (Deposit): DECMEBER 1993 (P. 6-8).
Reference (Deposit): CALIF. STATE MINING BUR. BULLETIN 76, 1918, P. 174.
Reference (Deposit): CALIF. JOUR. MINES AND GEOL. V. 37, 1941, P. 143.
Reference (Deposit): U.S. GEOLOGICAL SURVEY BULLETIN 945-B, 1944, P. 37-38.
Reference (Deposit): CALIF. DIV. MINES BULLETIN 134, 1953, PART II, CHAPT. 2,
Reference (Deposit): P. 65-67.
California Gold
"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.
