The Kalamazoo is a detached portion of the San Manuel orebody. Originally, there was a single orebody that was subsequently cut in half by a fault some 28-29 million years ago. The Kalamazoo was originally the top portion of the San Manuel orebody that was down-faulted several thousand feet. It is now the lower orebody that tops out at about 2,600 feet below surface. It is comprised essentially of sulfides, mainly chalcopyrite, with only a trace of oxidized minerals (Gary Alexander, former Geologist, San Manuel Mine - thanks Gary!)
References:
Schwartz, G.M. (1947), Hydrothermal alteration in the 'porphyry copper' deposits, Economic Geology: 42, 319-352.
Creasey, S.C. (1959), Some phase relations in the hydrothermally altered rocks of porphyry copper deposits, Economic Geology: 54: 351-373.
Lowell, J.D. (1968), Geology of the Kalamazoo orebody, San Manuel district, Arizona, Economic Geology: 63: 645-654;
Welty, J.W. (1988) Strontium isotopic compositions of igneous rocks at the San Manuel-Kalamazoo porphyry copper deposit, Pinal County, Arizona: Tucson, University of Arizona, M.S. prepublication manuscript, 27 p.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 113, 215, 257, 302, 309, 341.
Mineral List:12 entries listed. 9 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
