Board of Directors

Roberta Rudnick

University of California, Santa Barbara, USA

01/2018 - 12/2019

Roberta Rudnick is a professor in the Department of Earth Sciences at the University of California, Santa Barbara (as of Jan. 1, 2016). 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 Geochemical Fellow and a Fellow of the American Geophysical Union.

Vickie Bennett

Australian National University, Australia

Vice President
01/2018 - 12/2019

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.

Laurie Reisberg

Centre de Recherches Pétrographiques et Géochimiques (CRPG), France

Past President
01/2018 - 12/2019

Laurie Reisberg obtained her BSc at the University of Michigan in 1979 and her PhD from Lamont-Doherty Earth Observatory of Columbia University in 1988. After post-docs at the Institut du Physique du Globe in Paris and at Lamont-Doherty, she joined the Centre de Recherches Pétrographiques et Géochimiques, a research laboratory of the French national science agency (CNRS) and the Université de Lorraine, in Nancy, France. Her specialities are radiogenic isotopes and highly siderophile element geochemistry. In the early part of her career, her work was centered on mantle geochemistry, including studies of the formation and evolution of the non-cratonic lithosphere and of basaltic magmatism. She has also worked on erosion and how it is recorded in the marine radiogenic isotopic record, nucelosynthethic anomalies in meteorites, and the radiometric dating and source tracing of ore deposits and, most recently, of oils.

Sam Savin

New College of Florida, USA

01/2011 - 12/2019

Sam Savin has applied stable isotope techniques to a wide range of problems related to the sedimentation, diagenesis and low-grade metamorphism of siliclastic sediments, and to weathering and soil formation. He has also worked on the reconstruction of paleoclimatic and paleoceanographic conditions of the past 100 million years, based on carbon and oxygen isotopic distributions in planktic and benthic foraminifera. For a number of years, in collaboration with physician colleagues, he used stable carbon isotopic tracers to study metabolic processes in human infants and mothers. In recent years he has also been active as an academic administrator, serving as Dean of Arts and Sciences at Case Western Reserve University and Provost at New College of Florida. Sam is now retired and consults on geochemical, environmental and administrative matters. He is a Geochemical Fellow.

Sasha Turchyn

University of Cambridge, UK

01/2017 - 12/2019

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.

Magali Ader

Institute of Earth Physics of Paris, France

International Secretary
01/2017 - 12/2019

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.

Erdem Idiz

University of Oxford, UK

OGD Chair
01/2018 - 12/2019

Erdem Idiz is currently a 3-year Visiting Professor at the Earth Sciences Department of Oxford University and at St. Anne's College, Oxford. Prior to that, he spent 28 years working for Shell International E&P in various technical and leadership roles, primarily in the field of organic geochemistry and basin modelling conducting and overseeing research and applications. Erdem has a BSc degree in geology from Trinity College Dublin (1977) and MSc (1981) and PhD (1986) degrees in geology/geochemistry from the University of California at Los Angeles (UCLA). He spent time as a post-doctoral researcher at the Institut Francais du Petrole (IFP) in Paris before joining Shell in 1987. His research interests are primarily the fate of organic matter in the geological record and the application of multiple proxies to reconstruct paleoenvironments in which organic-rich sediments (aka source rocks!) were deposited. He currently serves as co-Editor in Chief for Organic Geochemistry.

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.

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.

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).

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.

Tamsin Mather

University of Oxford, UK

Board Member
01/2017 - 12/2019

Tamsin Mather is a volcanologist and Professor of Earth Sciences at the University of Oxford, UK where she has been on the faculty since 2006. She did an undergraduate masters degree in chemistry and has a masters degree in history and philosophy of science. Her PhD (2004, Cambridge, UK) was on the atmospheric chemistry of volcanic plumes and their environmental effects including in biogeochemical cycles. Since then her research has continued to broaden to explore the many and diverse ways in which volcanoes interact/have interacted with Earth's environment as well as understanding their behaviour from a hazard perspective. This has led to collaborations with a broad range of geochemists and geophysicists working from mantle to ionosphere and beyond. Before joining Oxford she was a research council fellow at the UK Parliamentary Office of Science and Technology and a Royal Society research fellow. As well as her role with the Geochemical Society, she sits on the AGU Committee on International Participation, the Natural Environment Research Council Science Board in the UK and is an editor of Earth and Planetary Science Letters.

Claudine Stirling

University of Otago, New Zealand

01/2017 - 12/2019

Claudine Stirling is an Isotope Geochemist and an Associate Professor in the Department of Chemistry at the University of Otago in New Zealand. Claudine received a BSc(Hons) from Victoria University of Wellington (1992) and a PhD from the Australian National University (1997), after which she spent two years at the University of Michigan as a Postdoctoral Fellow. She then spent six years at the ETH Zürich as a Research Scientist and Senior Research Scientist before being appointed Director of the Centre for Trace Element Analysis at the University of Otago in 2005. Claudine is a member of the Geochemical Society and an Associate Editor of Geochemica et Cosmochmica Acta. Claudine's research has focused on the geochemical analysis of the U-decay series isotopes, including the non-traditional U 'stable' isotope system, with emphasis on technique development by MC-ICPMS and with applications in paleoclimatology, paleoceanography, and cosmochemistry. Claudine also investigates the stable isotope systems of bioactive metals, such as cadmium, and redox-sensitive elements, such as iron, to investigate their biogeochemical cycling in the oceans and ability to track past ocean-atmosphere conditions.

Weidong Sun

Chinese Academy of Sciences, China

01/2018 - 12/2019

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

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)

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

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.