Guoxiang Chi, PhD, PGeo, is a Professor in the Department of Geology at the University of Regina, Canada. He received a BSc from Fuzhou University (China) in 1983, MSc from the Chinese Academy of Sciences in 1986, and PhD from the University of Quebec at Chicoutimi in 1992. He was a postdoctoral fellow at the University of Quebec at Chicoutimi from 1992 to 1993, and at the Geological Survey of Canada from 1994 to 1995. He then worked at the Geological Survey of Canada as a research scientist from 1996 until he joined the University of Regina in 2002. Dr. Chi's research interest is mainly in the field of economic geology, mineralization hydrodynamics, uranium geology, and geofluids, with an emphasis on application of fluid inclusion, stable isotope, and numerical modeling techniques. He has published over 180 journal papers and is currently an Associate Editor of Ore Geology Reviews and Acta Geologica Sinica.Matthew Steele-MacInnis is a Professor of Earth and Atmospheric Sciences at the University of Alberta. He received a BSc in Earth Sciences from Memorial University in 2008 and a PhD from Virginia Tech in 2013. He was a Marie Curie Postdoctoral Fellow at ETH Zürich from 2013 to 2015 and an assistant professor at the University of Arizona from 2015 to 2017, when he moved to the University of Alberta. Matt has been awarded a CAREER grant from the US National Science Foundation, the Hisashi Kuno Award from the American Geophysical Union, the Young Scientist Award from the Mineralogical Association of Canada, and the SGA Young Scientist Award from the Society for Geology Applied to Mineral Deposits. His research interests include all the aspects of the properties and roles of fluids in geologic systems, especially when it comes to the formation of mineral deposits. He has published 100 journal papers and is currently an Associate Editor of American Mineralogist, The Canadian Journal of Mineralogy and Petrology, and Mineralium Deposita.