IAS Benjamin Meaker Visiting Professor: John Mavrogenes

3 Oct - 17 December 2013

John Mavrogenes is an American earth scientist. After completing a PhD on fluid inclusions at Virginia Tech in 1994, he moved to a post doctoral fellowship at the Research School of Earth Sciences, Australian National University. He has remained there since, becoming a lecturer in 1998, a senior lecturer in 2002 and a Reader (= Associate Professor) in 2007. His work focuses on processes that lead to ore deposition, including gold solubility measured in synthetic fluid inclusions, sulfur solubility in mafic melts and the behaviour of ore deposits during metamorphism.

Dr. Mavrogenes takes both a laboratory and field-based approach to hydrothermal ore formation. In the laboratory he uses high-temperature and pressure apparatus to investigate the properties of hydrothermal solutions and magmas. Together with ANU colleague Hugh O’Neill, he has made seminal contributions to our understanding of the solubilitiy of sulphur in mafic magmas. Sulphur plays the key role in complexing with ore metals, such as copper, hence Dr. Mavrogenes’ work has fundamental bearing on the formation of base metal ore deposits. Dr. Mavrogenes’ field-based approach to orebody formation looks in particular at the geochemistry of fluid inclusions to provide clues to the physical chemistry of ore-forming solutions, including the speciation of base metals as determined using synchrotron radiation.

During his visit to the University of Bristol, he will be working on a project which focuses on the transport of metals in the sub-volcanic environment using advanced experimental and analytical techniques. These new data will open up new opportunities for exploration for new deposits based on advances in understanding of behaviour of volcanic gases rather than the much cooler hot water environments that have previously been assumed.This research project is closely allied to a new initiative in the School of Earth Sciences to investigate the relationship between volcanism and hydrothermal ore formation.

For more information about Dr. Mavrogenes' visit, please contact Professor Jon Blundy.