 | | Book | | considered to be a natural accumulation of useful mine ra l materials that can be profitably extracted...whereas the other one te nds to flow. At the Dunkin mine of the Breckenridge district, Colorado, the Dunkin...after it passed into shale (Fig. 2-4). In the same mine several le nticul a r ore shoots are separated by...Leadville, Colorado; or they m ay be lo ng to the great group o f stratiform deposits in sedimentary rocks, some...between porphyry and sediments, 350-ft level, Jerome mine, Ontario, Canada. Somewhat simplified after W. L |  | | Book (edition) | | McDonald Co\·er photo: \\ 7 ulfenite, Rowley Mine, Maricopa County, 4 cm high specimen, Evan and Melissa Jones...some species have been relegated to group names (e.g., monazite group); others have had element designations...the zeolite minerals, where chabazite is now a group name with five species who differ only in the major...International Mineralogical Association (IMA), changed to a group name, or renamed by changes in nomenclature as mineral...gemandmineralmuseum.arizona.edu) is located in the old Pima County Courthouse building at 115 North Church Avenue |  | | Book (edition) | | Dutoitspan’ Mine... iawn kic. haa ented jhe. exniat ves Tis Aetialview of Koftiefontein’ Diamond Mine? .?: ssc........0 cece eens Grassing an O\daw itwatetsrand MINE ;QUIND An... oh «aus. aoe peopel ouge ote ok tos...Complex, the Prieska copper mine, the Vlakfontein nickel pipes, the Atok platinum mine, and sources of mineral...IBONONICC enter roarrciegtye sve nye)sa eferape saree China (kaolin)......... Fire (raw and calcined).........platinum, iridium and any other metals of the platinum group and include the ores of all these metals, while |
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