E/MJ : engineering and mining journal . ^ -D H, ,. ., ? ;. ; SECTION THROUGH DISSEMINATED DEPOSITS O F DISTRICT SHQ-mNG OXIDIZED CAPPING ENRICHED SULPHIDE ZONEFrom Utah Copper Co. annual report table has caused an unusual complex cycle of altera-tion by surface agencies in some of the deposits. Nearlyall types of deposits have been both enriched and made. FIG. 10. GENERALIZED SECTIO!\\ SHOWING TYPES OF ORE IN THE HORN SILVER MINE A, oxidized lead-silver ore ; B. oxidized copper ore ; C. secondary copper sulphide ore; D, Secondary zinc sulphide ore ; E, primary sulphide ore more amenab
E/MJ : engineering and mining journal . ^ -D H, ,. ., ? ;. ; SECTION THROUGH DISSEMINATED DEPOSITS O F DISTRICT SHQ-mNG OXIDIZED CAPPING ENRICHED SULPHIDE ZONEFrom Utah Copper Co. annual report table has caused an unusual complex cycle of altera-tion by surface agencies in some of the deposits. Nearlyall types of deposits have been both enriched and made. FIG. 10. GENERALIZED SECTIO!\\ SHOWING TYPES OF ORE IN THE HORN SILVER MINE A, oxidized lead-silver ore ; B. oxidized copper ore ; C. secondary copper sulphide ore; D, Secondary zinc sulphide ore ; E, primary sulphide ore more amenable to metallurgical treatment by thenatural process of concentration. In nature, as in smelting, starting with a sulphideorf- the process is essentially one of oxidation. This, oxidation, but has undergone residual concentration inthe gossans, as in the Bingham district, and the goldof the gossan may have been later concentrated in , the natural process of oxidation has elim-inated one step in the metallurgical process. In theMercur district the unoxidized ores required roastingbefore cyanidation, whereas the oxidized ores could betreated without roasting. Silver, like gold, has apparently moved little underthe prevailing conditions. This is probably due to thefact that chlorides are abundant in the region, andenough are present in the water
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
