Arizona Geological Society

April 2019 - Dan Johnson - Florence Copper: Copper Recovery Using In-situ Leach Technology

March 2019 - Sarah E. Baxter, Treasures of Arizona's Sky Islands:  Geology and Mineral Resources of Coronado National Forest

February 2019 - Jeffrey E. Post, The Hope Diamond and Smithsonian National Gem Collection.

January 2019 - John Dilles, Using the Zonation of Trace Metal Geochemistry and Hydrothermal Mineralogy for Porphyry Copper Mineral Exploration

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