Research
Current Projects (PCIGR)
- Implementation of a standardized thallium isotope method (chromatography, MC-ICP-MS)
- Calibrating thallium isotopes for use as a paleoredox proxy from seasonally anoxic fjords
Biography
PhD 2026, University of Waterloo
"Late Paleoproterozoic ocean redox history from sedimentary thallium and uranium isotopes and implications for eukaryotic evolution"
Publications
Farrell, Ú.C., ..., Kunert, A., ..., Sperling, E. (2026). The Sedimentary geochemistry and paleoenvironments project phase 2 data release: An open data resource for the study of Earth's environmental history. Chemical Geology, 123311. https://doi.org/10.1016/j.chemgeo.2026.123311
Kunert, A., Poulton, S.W., Canfield, D.E., Fralick, P.W., Gilleaudeau, G.J., Kendall, B. (2025). Controls on uranium isotope fractionation in the late Paleoproterozoic ocean. Earth and Planetary Science Letters 666, 119498. https://doi.org/10.1016/j.epsl.2025.119498
Kunert, A., Kendall, B. (2023). Global ocean redox changes before and during the Toarcian Oceanic Anoxic Event. Nature Communications 14, 815. https://doi.org/10.1038/s41467-023-36516-x
Kunert, A., Clarke, J., Kendall, B. (2020). Molybdenum Isotope Constraints on the Origin of Vanadium Hyper-Enrichments in Ediacaran–Phanerozoic Marine Mudrocks. Minerals 10(12), 1075. https://doi.org/10.3390/min10121075
Kendall, B., Wang, J., Zheng, W., Romaniello, S.J., Over, D.J., Bennett, Y., Xing, L., Kunert, A., Boyes, C., Liu, J. (2020). Inverse correlation between the molybdenum and uranium isotope compositions of Upper Devonian black shales caused by changes in local depositional conditions rather than global ocean redox variations. Geochimica et Cosmochimica Acta 287, 141-164. https://doi.org/10.1016/j.gca.2020.01.026
Kunert, A., Kendall, B., Moslow, T.F., Nyberg, G., Pedersen, B., Smith, C. (2019). Preliminary Characterization of Early Jurassic Source Rocks and Ocean-Redox Conditions Based on Trace-Metal and Organic Geochemistry of the Gordondale and Poker Chip Shale Members, Fernie Formation, Northeastern British Columbia. Geoscience BC Summary of Activities 2018: Energy and Water, Report 2019-2, 29-42.
Conferences
Rajurkar, V., Kunert, A., Banerjee, Y., Roberts, N.M.W., Gilleaudeau, G.J., Cui, H., Curtis, J., Hohl, S.V., Kendall, B., Algeo, T.J., Sahoo, S.K.* (15 July 2026). Paleoproterozoic Oxygenation Event, Evidence from S and N Isotopes. Goldschmidt 2026 Montréal, Montréal, QC. [Poster]
Kunert, A.*, Riedman, L.A.S., Lechte, M., Kendall, B. (10 July 2025). Evidence for oxygenation at ∼1.65-1.64 Ga from authigenic thallium isotopes in McArthur Basin shales. Goldschmidt 2025 Prague, Prague, CZ. [Oral Presentation]
Kendall, B.*, Kunert, A., Riedman, L.A.S., Lechte, M. (22 May 2025). The emerging thallium isotope perspective on oxygenation of late Paleoproterozoic oceans leading up to the appearance of multicellular eukaryotes. Geobiology 2025, Banff, AB. [Lightning Talk]
Kunert, A.*, Riedman, L.A., Lechte, M., Kendall, B. (13 May 2025). Manganese oxides in the Late Paleoproterozoic oceans—Evidence from authigenic thallium isotopes. GAC MAC 2025 Ottawa, Ottawa, ON. [Oral Presentation]
Kunert, A.*, Riedman, L.A.S., Lechte, M., Kendall, B. (20 August 2024). Light thallium isotope ratios in black shales of the 1.73 Ga Wollogorang Formation, Northern Australia. Goldschmidt 2024 Chicago, Chicago, IL. [Oral Presentation]
Kunert, A.*, Poulton, S.W., Canfield, D.E., Fralick, P.W., Kendall, B. (11 July 2023). Uranium isotope fractionation in the Paleoproterozoic ocean: A multi-core study of the Rove and Virginia Formations, Superior Province, North America. Goldschmidt 2023 Lyon, Lyon, FR. [Oral Presentation]
Kunert, A.*, Poulton, S.W., Kendall, B. (12 October 2021). Shift in Global Ocean Redox Structure Captured by Uranium Isotopes from 1.84 Ga Rove Formation (Ontario, Canada) Black Shales. GSA Connects 2021, Online/Portland, OR. [Oral Presentation]
Kunert, A.*, Kendall, B. (25 June 2020). Spatiotemporal tuning of trace metal mass balance models to quantify global oceanic anoxia for the T-OAE. Goldschmidt Virtual 2020, Online. [Oral Presentation]
Kendall, B.*, Kunert, A., Yang, S. (22 June 2020). Vanadium hyper-enrichments in marine organic-rich mudrocks. Goldschmidt 2020, Online. [Oral Presentation]
Kunert, A.*, Kendall, B. (22 September 2019). Early Jurassic paleoenvironmental reconstruction in the Western Canada Sedimentary Basin and inference of expanded ocean anoxia/euxinia across the Toarcian OAE from global Re and Mo mass balance models. GSA Annual Meeting 2019, Phoenix, AZ. [Poster]
Kunert, A.*, Kendall, B., Moslow, T., Nyberg, G., Pedersen, B., Smith, C. (13-17 May 2019). Early Jurassic Source Potential and Ocean Redox Conditions Inferred from Trace Metal and Organic Geochemistry of the Gordondale Member and Poker Chip Shale, Northeastern BC. GeoConvention 2019, Calgary, AB. [Poster]