Mine detail: Holbrook and Mcguire Mine

Previously called 'Holbrook and Mcguire GroupHigh Grade WorkingsLow Grade Workings'

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Location

Lat / long: 37.96021, -120.5641

Resource(M)

Tertiary: Chromium, Iron
Other material: Chromite, Magnesite, Serpentine
Discovery year: 1890

Production

Operation type: Surface-Underground
Development status: Past Producer
First production started: 1918

Geology

References

MRDSM004639
MAS60090560
DEP10187077
Reference{Deposit:: CAL. DIV. MINES GEOL BULL 134,PT3CHAP 2,P.42-44,PL.5}{Deposit:: CAL DIV MINES GEOL BULL 145,PL 2}{Deposit:: CAL. COUNTY REPT NO.2,P.22,129,& PL.D 1962}{Deposit:: COOP WAR MINERALS INVEST. PROJ, CALAVERAS COUNTY NO.6&7, 19}
ReporterWetzel, Nicholas