The ore deposits of Utah . : 1 S/• ^;-\ ;- Figure 54.—Generalized stereogram showing the relation of pcgmatiticquartz and altered and mineralized quartz monzonite in the O. 1, Pipe of pegmatitic quartz; 2, altered quartz monzonite; 3,quartz monzonite; 4, high-grade ore. brecciation of the rock but probably not ex-tensive displacement. The deposits are moreor less chimney shaped, especially the O. , which consists of a central chimneyof pegmatitic quartz surrounded by altered andmineralized quartz monzonite. (See fig. 54.)In the Cactus ore zone the ore and gangue min-era
The ore deposits of Utah . : 1 S/• ^;-\ ;- Figure 54.—Generalized stereogram showing the relation of pcgmatiticquartz and altered and mineralized quartz monzonite in the O. 1, Pipe of pegmatitic quartz; 2, altered quartz monzonite; 3,quartz monzonite; 4, high-grade ore. brecciation of the rock but probably not ex-tensive displacement. The deposits are moreor less chimney shaped, especially the O. , which consists of a central chimneyof pegmatitic quartz surrounded by altered andmineralized quartz monzonite. (See fig. 54.)In the Cactus ore zone the ore and gangue min-erals are deposited in spaces between corrodedfragments of the quartz monzonite. In bothzones the structural relations indicate that thespaces occupied by the ore and gangue min-erals were formed largely by the solution of therock in the early stages of mineralization andnot by dynamic movement. In theO. K. deposit the solutions were appar-ently relatively confined, and the dissolvingaction was strong, resulting in th
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectminesandmineralresou
