Raines, G.L., 1978, Porphyry copper exploration model for northern Sonora, Mexico: U.S. Geological Survey Journal of Research, v. 6, no. 1, p. 51-58. Authors Raines, G.L. Publication Date 1978 Citation U.S. Geological Survey Journal of Research, v. 6, no. 1, p. 51-58. State AZ MEX Province BR County SC Placenames Nogales area Keywords Porphyry Copper Exploration Alteration Structure Lineament More Keywords Porphyry Copper, Exploration, Alteration, Structure, Lineament, AzGeoBib RefNum 14446