Dr Ashley Martin

Assistant Professor

School: Geography and Natural Sciences

I trained as a chemist at the University of York and wrote my doctoral thesis in Australia at the University of Wollongong. Following a brief spell working in industry as an Environmental Consultant in Sydney, Australia, I spent my postdoctoral years in Germany at the Leibniz University Hannover.

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Research Themes and Scholarly Interests

I am an Isotope Geochemist primarily interested in how Earth became and has remained (mostly) habitatable for the past 3.5 billion years. I primarily use uranium and vanadium isotopes as novel proxies for tracing past changes in marine oxygenation levels and nitrogen isotopes to understand past changes in biological productivity.

Key Publications

Please visit the Pure Research Information Portal for further information
Anomalous δ15N values in the Neoarchean associated with an abundant supply of hydrothermal ammonium, Martin, A., Stüeken, E., Gehringer, M., Markowska, M., Vonhof, H., Weyer, S., Hofmann, A. 22 Feb 2025, In: Nature Communications
Mechanisms of nitrogen isotope fractionation at an ancient black smoker in the 2.7 Ga Abitibi greenstone belt, Canada, Martin, A., Stüeken, E., Michaud, J., Münker, C., Weyer, S., van Hees, E., Gehringer, M. 1 Mar 2024, In: Geology
Assessing the reliability of modern marine stromatolites as archives for the uranium isotope paleoredox proxy, Martin, A., Markowska, M., Chivas, A., Weyer, S. 15 Mar 2023, In: Geochimica et Cosmochimica Acta
Late Quaternary variability in sediment residence time and provenance in the Gulf of Carpentaria, northern Australia, Dosseto, A., Martin, A., May, J., Kinsley, L., Karatchevtseva, I., Chivas, A. 15 Oct 2025, In: Quaternary Science Reviews
Sediment residence times in catchments draining to the Gulf of Carpentaria, northern Australia, inferred by uranium comminution dating, Martin, A., Dosseto, A., May, J., Jansen, J., Kinsley, L., Chivas, A. 1 Jan 2019, In: Geochimica et Cosmochimica Acta

PGR Supervision

Nel Jones Hydrothermal and redox controls on ancient marine productivity during the Late Ordovician Mass Extinction and the Ordovician-Silurian transition. Start Date: 10/10/2025