The State of Sonora, where several porphyry copper deposits are located, is south of Arizona and New Mexico, USA. Sonora and the copper province of the southwestern USA have similar physiography in part, mineralized areas, and geologic conditions, which have been traced southward parallel with the Mexican Pacific Coast.

This paper is a summary of the regional geology of the area as well as of geologic characteristics of the mineralization and alteration of the main deposits such as Cananea, Pilares de Nacozari, and La Caridad.

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