Dr. Osvaldo Rabbia (University of Concepción, Chile)
Dr. Osvaldo Miguel Rabbia is an Associate Professor with exclusive dedication at the University of Concepción, Chile, where he has been engaged in academic activities since 1991 and has held his current position since 1995. His specialization focuses on mineral chemistry, geochemistry, and petrology applied to Andean metallogenesis, with emphasis on copper porphyry systems.
He has participated in numerous research projects funded by the mining industry, as well as in competitive academic initiatives, and maintains a solid, sustained scientific record, including more than 40 publications in specialized journals. His work has significantly contributed to the understanding of magmatic and hydrothermal processes and their relationship to metallogenesis in Andean convergent margins. He received training in geochemistry at Niigata University, Japan, where he completed graduate studies in mineral chemistry and geochemistry.
Throughout his career, he has taught numerous undergraduate and graduate courses in mineralogy, igneous petrology, metallogenesis, and the geochemistry of mineral deposits, in addition to supervising and co-supervising undergraduate and graduate theses. He has also developed an intense engagement with the mining industry through specialized courses and workshops on Cu-Mo-Au porphyry systems, Andean tectonic evolution, and metallogenic processes. He was distinguished by the Geological Society of Chile with the award for the best invited lecture in 2003.
Abstract
The Andean Cordillera hosts one of the largest copper endowments on the planet, yet its distribution is markedly heterogeneous in both space and time. This presentation provides an updated assessment of the Andean copper endowment generated over the last ~80 Ma, estimated at ~1,300 Mt Cu, organized into five major porphyry copper belts. Based on this framework, and using a metric that smooths local biases (e.g., Cu in kt/Ma/km), the concept of metallogenic fertility—the capacity of the arc–lithosphere system to generate and preserve large deposits—will be discussed. Key contrasts between segments of the orogen will be highlighted, including the pronounced difference between the Northern Andes and the Central Andes, as well as the relationship between copper productivity and the age of the Central Andean belts. Finally, the role of large-scale geodynamic processes—particularly slab flattening and the collision/subduction of buoyant oceanic anomalies (ridges and plateaus)—will be explored as factors that enhance metallogenic efficiency in Neogene belts, with direct implications for target generation programs and the exploration of potentially concealed porphyry copper systems beneath cover in analogous subduction margins.
