Board of Directors

Vickie Bennett

Australian National University, Australia

President
01/2020 - 12/2021

Vickie Bennett is a Professor at the Research School of Earth Sciences, Australian National University, where she is also an Associate Director and the Head of the SPYDE2R Isotope Geochemistry Facility. Her research applies isotopic approaches to understanding the origin and evolution of Earth's continental crust and mantle reservoirs, early planetary differentiation, and geosphere–biosphere interactions in deep time. She is a Geochemical Fellow and a Fellow of the Geological Society of America.

Sumit Chakraborty

Ruhr Universität at Bochum, Germany

Vice President
01/2020 - 12/2021

Sumit Chakraborty is a Professor at the Ruhr Universität at Bochum, Germany and director of the central accelerator facility, RUBION, on the campus of the University. He is interested in the timescales of geological and planetary processes, and in how processes occurring on a hierarchy of nested timescales are coupled to each other. He uses physical chemistry, in particular kinetics and diffusion, to develop tools for the determination of timescales. His research is based to equal extents on field studies, laboratory experiments and theoretical developments. He is a Geochemistry Fellow and was awarded the Dana Medal by the Mineralogical Society of America.

Roberta Rudnick

University of California, Santa Barbara, USA

Past President
01/2020 - 12/2021

Roberta Rudnick is a professor in the Department of Earth Sciences at the University of California, Santa Barbara. Her research focuses on the origin and evolution of the continents, particularly the lower continental crust and the underlying mantle lithosphere. Emphasis is placed on integration of data from a wide diversity of sources, including petrography, petrology, major and trace element geochemistry, stable and radiogenic isotope geochemistry, and geophysics in order to determine the bulk composition of the crust, the processes that have influenced its composition through time, and why the Earth has continents. She is a Geochemistry Fellow and a Fellow of the American Geophysical Union.

Magali Ader

Institute of Earth Physics of Paris, France

International Secretary
01/2017 - 12/2022

Magali Ader obtained her Master (1995) and her PhD (1999) at the Institut de Physique du Globe de Paris, France. After a post doc at Reading University, she joined the Paris Diderot University and Institut de Physique du Globe de Paris in 2001, where she was appointed professor of geochemistry in 2013. Her research interests focus mainly on deciphering C, N and Cl stable isotope compositions in sedimentary rocks and fluids. This has led her to address several aspects of Earth Sciences including the evolution of carbon and nitrogen biogeochemical cycles through time, bacterial vital effects, diagenesis, fluid-rock interactions in CO2 storage sites and solute transport properties in sedimentary basins.

Sasha Turchyn

University of Cambridge, UK

Secretary
01/2017 - 12/2022

Sasha (Alexandra) Turchyn is a low temperature isotope geochemist at the University of Cambridge (UK) in the Department of Earth Sciences. She got her PhD from Harvard University and was a postdoctoral fellow at the University of California, Berkeley, at the Miller Institute for Basic Research. She is currently a Reader in Biogeochemistry and fellow of Trinity Hall College. Sasha's research focuses on the use of light stable isotopes to elucidate pathways and processes in the sedimentary biosphere and to understand the role of sedimentary diagenesis in the global carbon cycle.

Haibo Zou

Auburn University, USA

Treasurer
01/2020 - 12/2022

Haibo Zou is Professor of Geology in the Department of Geosciences at Auburn University, USA. His research areas include isotope geochemistry, igneous petrology, volcanology, and theoretical geochemistry. He is the author of the book Quantitative Geochemistry. He is an Associate Editor for Geological Society of America Bulletin and a Fellow of the Geological Society of America.

Hilairy Hartnett

Arizona State University, USA

OGD Chair
01/2020 - 12/2021

Hilairy Hartnett is an Associate Professor in the School of Earth and Space Exploration and in the School of Molecular Sciences at Arizona State University. She is a graduate of Vassar College, received her M.S. and Ph.D. degrees in Oceanography at the University of Washington, and was a postdoctoral scholar at the Institute of Marine and Coastal Sciences at Rutgers University. Her research interests include carbon and nitrogen cycling in marine, terrestrial and hydrothermal ecosystems; urban biogeochemistry and anthropocene science; and astrobiology, particularly the habitability of exoplanets.

Anna Martini

Amherst College, USA

OGD Secretary
01/2019 - 12/2021

Anna Martini is a Professor at Amherst College in the Departments of Geology and Environmental Studies. Her undergraduate degree is from from Colgate University, M.S. in Hydrogeology from Syracuse University and Ph.D. in Geochemistry from the University of Michigan. Her research interests include the biodegradation of methane, ethane and propane in groundwater, the geomicrobiology of shale-gas deposits, and the biogeochemical effects of legacy pollution in our waterways. She specifically focuses on the stable isotopic signals recorded in carbon, hydrogen, nitrogen and sulfur in these systems.

Stephen Parman

Brown University, USA

Goldschmidt Officer
01/2017 - 12/2020

Stephen Parman is an experimental petrologist and geochemist. His research focuses broadly on the origin and evolution of the Earth and terrestrial planets. Currently his group's main projects include volatile cycling in the terrestrial mantle, evolution of the continental crust, early Earth magmatism, lunar mantle evolution and most recently, the evolution of Mercury's interior and surface. His primary mode of research uses high pressure experiments to quantify geochemical equilibrium and kinetic parameters and processes. The experimental data is used in conjunction with geochemical observations of terrestrial and planetary materials and geodynamic modeling. Stephen is an associate professor at Brown University in the Department of Earth, Environmental and Planetary Sciences (DEEPS).

Ken Rubin

University of Hawaii

Goldschmidt Officer
01/2019 - 12/2022

Kenneth H. Rubin is a Professor of Geochemistry and Volcanology in the Department of Earth Sciences, School of Ocean and Earth Science and Technology at the University of Hawai'i at Manoa.

Jeff Catalano

Washington University in St. Louis, USA

GCA Executive Editor

Jeff Catalano is a faculty member in the Department of Earth and Planetary Sciences at Washington University, where he is currently a professor of aqueous geochemistry and mineralogy. His current research program now spans the areas of environmental biogeochemistry, planetary geochemistry, and geobiology. Active projects in Jeff's group investigate: (1) trace metal fate during iron and manganese oxide mineral transformations, (2) the properties of interfacial water near mineral surfaces, (3) microbial utilization of Fe(II) in trioctahedral clay minerals as electron donors on the early Earth, (4) oxidation of iron on Mars by oxychlorine species, (5) redox-driven recrystallization of lead and uranium oxide minerals, (6) clay formation and alteration on Mars, and (7) trace metal limitations on methanogenesis, denitrification, and Hg methylation in freshwater aquatic systems.

Weidong Sun

Chinese Academy of Sciences, China

Director
01/2018 - 12/2020

Weidong Sun is a Professor and Director of the Center of Deep Sea Research at the Institute of Oceanology, the Chinese Academy of Sciences. He works mainly on trace element and isotope geochemistry, with research interests on the Subduction Factory, namely the chemical processes during plate subduction; Pacific plate reconstruction, mechanisms of crust formation and mineralization; the behavior of chalcophile elements and mineralization; origin of mantle plumes. He currently serves as the Editor of Solid Earth Sciences and Associate Editor of Geochimica et Cosmochimica Acta.

Lesley Warren

University of Toronto, Canada

Director
01/2018 - 12/2020

Lesley Warren holds the Claudette Mackay-Lassonde Chair in Mineral Engineering and is the current Director of the Lassonde Institute of Mining at the University of Toronto. Her research combines environmental and microbial geochemistry, with a major emphasis on biogeochemical cycling in resource sector waste and wastewater contexts. She has served as an Editor for Geochemical News and served on both the GS Award Nominations and Program committees.

Elizabeth Cottrell

National Museum of Natural History, Smithsonian Institution (USA)

Director
01/2019 - 12/2021

Elizabeth Cottrell is a Research Geologist in the Department of Mineral Sciences at the National Museum of Natural History, Smithsonian Institution (USA) where she is also Curator-in-Charge of the National Rock and Ore Collection. As an experimental petrologist, Liz applies spectroscopy and other microanalytical techniques to natural and synthetic specimens to understand the origin and evolution of Earth's crust, mantle, and core. Her service to the Geochemical Society includes serving on and chairing the Program Committee, and serving as the Magma and Volcanoes Theme Chair for the 2018 Goldschmidt Conference. She is a Fellow of the Mineralogical Society of America.

Naomi Harada

Japan Agency for Marine-Earth Science and Technology

Director
01/2019 - 12/2021

Naomi Harada is the deputy director of the Research and Development Center for Global change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) and a professor at the National Institute of Polar Research. Her research began with paleoceanographic studies by using biomarkers (organic compounds) recorded in sediment cores to understand changes in the sea surface temperature, biological productivity, and intermediate-deep water ventilation over orbital and millennial time scales, mainly in the subarctic North Pacific including marginal seas (Okhotsk and Bering Seas). Her most recent work has focused on how climate change affects the biological and biogeochemical aspects of the eastern Bering Sea and the Arctic Ocean. She contributed to the 2016 Goldschmidt Conference as a member of the Local Organizing Committee.

Mark Rehkämper

Imperial College London, UK

Director
01/2020 - 12/2022

Mark Rehkämper is Professor of Isotope Geochemistry at the Department of Earth Science & Engineering of Imperial College London (United Kingdom). His research interests are broad and encompass the application of radiogenic and non-traditional stable isotope systems to address questions in planetary, earth, environmental and life sciences. For example, he applies isotopic measurements to study cycling of anthropogenic Pb in the oceans, investigate the depletion of volatile elements in the terrestrial planets, to examine the uptake of toxic Cd by crops, and elucidate the role of trace metals in human health. He has previously served the society as a member of the Nominations Committee, the Joint Publications Committee, and supported various Goldschmidt Conferences.

Tracy Rushmer

Macquarie University, Australia

Director
01/2020 - 12/2022

Tracy Rushmer is a faculty member in the new Earth and Environmental Sciences Department at Macquarie University (Australia) and is also serving as Associate Dean Higher Degree Research for the Faculty of Science and Engineering. She is an experimental petrologist and overseas several experimental laboratories which can induce both hydrostatic and deformation conditions to investigate mineral interactions under pressure and temperature. Her work focuses on the evolution of planetary bodies, particularly on differentiation, which is the fundamental mechanism by which the terrestrial planets evolve through time. She previously served on the Nominations Committee and as a theme chair for Goldschmidt in 2017 and 2018. She is a Fellow of the Mineralogical Society of America.

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