Gold in porphyry copper systems /

Gold in porphyry copper systems / by Edwin W.Tooker - Washington, D. C. : United States Goverment Printing office, 1990 - 55 p. : il. ; 28 cm. - Geology and resources of gold in the united states / ch.E(U. S. Geological survey Bulletin ; 1857) .

Includes bibliographical references


Golg ores--West (United States)
Copper ores--West (United States)
Geology--West (United States)

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