Fragments of terra rock in the Apollo 12 soil samples and a structural model of the moon John Andy Wood. Meteoritical Society. The Allende, Mexico meteorite: Strewnfield and specimen morphology. Roy S.
Aristarchus Plateau large igneous province: The case for bi-modal volcanism. M Zanetti , B L. Valencia , Randy L. Korotev , Bradley L. Jolliff , Anthony J. Silicic lunar volcanism: Testing the crustal melting model Amber L.
Gullikson , Justin J. Hagerty , Mary R. Reid , Jennifer F. Rapp , David S.
Ghiorso , Guilherme A R Gualda. Login Register. Display statistics. The evolution of Laramide igneous rocks and porphyry copper mineralization in the Cananea district, Sonora, Mexico.
The Later Stages of the Evolution of the Igneous Rocks
Author Wodzicki, Wojtek Alexander. Issue Date Committee Chair Barton, Mark.
Metadata Show full item record. Publisher The University of Arizona. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation such as public display or performance of protected items is prohibited except with permission of the author. Abstract This study investigates the relationship between the evolution of the igneous and hydrothermal systems in the Cananea mining district located in northern Sonora, Mexico.
Phase petrology, mineral compositions, whole rock geochemistry, and alteration mineralogy indicate water, metal, chlorine, and sulfur content of the magmas increased with increasing differentiation and reached a maximum in late stage differentiates. The mineralized quartz-feldspar porphyries represent the rapid upward emplacement of this enriched differentiate.
G Igneous Petrology
Porphyry-related mineralization in the Cananea district includes pegmatitic silicate-sulfide mineralization represented by the La Colorada and Maria deposits. Detailed field and geochemical work on the Maria deposit suggests that the fluids, alteration assemblages and paragenetic relations in silicate-sulfide pegmatites are similar to those seen in stockwork- and breccia pipe-hosted porphyry Cu systems, but that silicate-sulfide mineralization represents transitional conditions in which magmatic fluids are concentrated in a small volume and undergo efficient cooling and decompression leading to formation of high-grade telescoped mineralization.
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