Mine detail: Alma

<< Back to the map

<< Back to browsing

Location: Alameda County, California, United States, North America
Lat / long: 37.80379, -122.17215
dep_id: 10036253
mrds_id: M024332
Commodity type: metallic and nonmetallic
Major mineral: Copper
Minor mineral: Sulfur
Operation type: Unknown
Production size: Production occurred
Development status: Past Producer
ore: Bornite, Chalcocite, Chalcopyrite, Pyrite, Sphalerite
orebody_fm: LENTICULAR
work_type: Underground
conc_proc: Leaching
ore_ctrl: Fractures
Reporter: Fraticelli, L. A. (Albers, J.)
hrock_type: Rhyolite
Structure: Hayward Fault: Two Parallel Smaller Faults With Horizontal Displacement.
References:
  • Deposit:: DAVIS, F.F., 1950: MINES AND MINERAL RESOURCES OF ALAMEDA COUNTY; CALIF. JOUR. MINES AND GEOLOGY, 001 46, NO.2 DIV OF MINES, P. 290.
  • Deposit:: ERIC, J.H., 1948: COPPER IN CALIFORNIA BULL. 144: DIV. OF MINES, P-212
  • Deposit:: LAIZURE, C.V., 1929: SAN FRANCISCO FIELD DIV.; 25TH REPT. STATE MIN.; CALIF DIV. OF MINES P. 440.
© 2010-2018 Lee C. Baker unless noted. All rights reserved.