Articles | Ostrander Lab

2026

Rethinking seawater Mo isotope mass-balance and the sedimentary Mo record

Chadlin M. Ostrander, Olaf Dellwig

The sedimentary geochemistry and paleoenvironments project phase 2 data release: An open data resource for the study of Earth's environmental history

Úna C. Farrell et al.

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Thallium isotopic evidence for the Tonian rise and Cryogenian fall of Neoproterozoic oxygen levels

Lucy C. Webb, Francis A. Macdonald, Galen P. Halverson, Chadlin M. Ostrander, Sune G. Nielsen, Erik A. Sperling

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Oxygenating Earth

Chadlin M. Ostrander, Andy W. Heard, Brian Kendall, Robert W. Nicklas, Andrey Bekker, Aleisha C. Johnson, Ariel D. Anbar, Timothy W. Lyons

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2025

Onset of persistent surface ocean oxygenation during the Great Oxidation Event

Andy W. Heard, Chadlin M. Ostrander, Yunchao Shu, Andrey Bekker, Simon W. Poulton, Sune G. Nielsen

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The rise of free oxygen may have initiated on marine mud

Joanne S. Boden, Chadlin M. Ostrander, Eva E. Stüeken

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Phengite controls on thallium elemental and isotopic systematics in subduction-zone fluids

Yunchao Shu, Sune G. Nielsen, Veronique Le Roux, Ryan Mckenzie, Jerzy Blusztajn, Chadlin M. Ostrander, Shun Guo, Xiao-Feng Gu, Juan Xu, Chuan-Zhou Liu

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Dynamic deep marine oxygenation during the Early and Middle Paleozoic

Chadlin M. Ostrander, Jean N.R. Clemente, Richard G. Stockey, Justin V. Strauss, Tiffani Fraser, Sune G. Nielsen, Erik A. Sperling

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Thallium isotopes suggest the global deep ocean did not approach modern oxygenation during Cambrian Age 3 metazoan radiation

Jean N.R. Clemente, Haifeng Fan, Chadlin M. Ostrander, Hongjie Zhang, Hanjie Wen, Erik A. Sperling, Sune G. Nielsen

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Thallium cycling and boundary exchange in a continental margin basin

Kasper P. Olesen, Sune G. Nielsen, Chadlin M. Ostrander, Nicol Udy, Donald E. Canfield

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Thallium isotope data suggest minimal recycled material within the proto-Iceland mantle plume source

Jonas Kaare-Rasmussen, Forrest Horton, Chadlin M. Ostrander, Sune G. Nielsen

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Transient marine bottom water oxygenation on continental shelves by 2.65 billion years ago

Xinming Chen, Chadlin M. Ostrander, Brett J. Holdaway, Brian Kendall, Ariel D. Anbar, Sune G. Nielsen, Jeremy D. Owens

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Extending the utility of the Tl isotope paleoredox proxy to carbonates

Yunchao Shu, Chadlin M. Ostrander, Dalton S. Hardisty, Peter K. Swart, Sune G. Nielsen

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Thallium isotope cycling in a ferruginous Precambrian ocean analogue

Chadlin M. Ostrander, Andy W. Heard, Yunchao Shu, Wang Zheng, Yaqiu Zhao, Sune G. Nielsen

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2024

Iron cycling and isotopic fractionation in a ferruginous, seasonally ice-covered lake

Andy W. Heard, Chadlin M. Ostrander, Elizabeth D. Swanner, Kathryn Rico, Sune G. Nielsen

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Onset of coupled atmosphere-ocean oxygenation 2.3 billion years ago

Chadlin M. Ostrander, Andy W. Heard, Yunchao Shu, Andrey Bekker, Simon W. Poulton, Kasper Olesen, Sune G. Nielsen

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Anthropogenic forcing of the Baltic Sea thallium cycle

Chadlin M. Ostrander, Yunchao Shu, Sune G. Nielsen, Olaf Dellwig, Jerzy Blusztajn, Heide N. Schulz-Vogt, Vera Hübner, Colleen M. Hansel

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Oxygenation of the Proterozoic surface: an evolving story

Brian Kendall, Chadlin M. Ostrander

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2023

The role of manganese oxide mineralogy in thallium isotopic fractionation upon sorption

Rachel F. Phillips, Yi Wang, Frieder Klein, Gabriela Farfan, Chadlin M. Ostrander, Hayley Gadol, Colleen M. Hansel, Sune G. Nielsen

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Recurrent photic zone euxinia limited ocean oxygenation and animal evolution during the Ediacaran

Wang Zheng, Anwen Zhou, Swapan K. Sahoo, Morrison R. Nolan, Chadlin M. Ostrander, Ruoyu Sun, Ariel D. Anbar, Shuhai Xiao, Jiubin Chen

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Particle- and light-mediated processes control seasonal manganese oxide cycling in a meromictic pond

Hayley Gadol, Chadlin M. Ostrander, Luciana Villarroel, Lina Taenzer, Scott D. Wankel, Véronique E. Carignan, Colleen M. Hansel

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Mulling and nulling the coeval rise of Ediacaran oxygen and animals

Chadlin M. Ostrander

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Widespread seafloor anoxia during generation of the Ediacaran Shuram carbon isotope excursion

Chadlin M. Ostrander, Christian J. Bjerrum, Anne-Sofie C. Ahm, Simon R. Stenger, Kristin D. Bergmann, Mohamed A.K. El-Ghali, Abdul R. Harthi, Zayana Aisri, Sune G. Nielsen

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Technical comment on "Reexamination of 2.5-Ga "whiff" of oxygen interval points to anoxic ocean before GOE

Ariel D. Anbar, Roger Buick, Gwyneth W. Gordon, Aleisha C. Johnson, Brian Kendall, Timothy W. Lyons, Chadlin M. Ostrander, Noah J. Planavsky, Christopher T. Reinhard, Eva E. Stüeken

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Thallium isotope cycling between waters, particles, and sediments across a redox gradient

Chadlin M. Ostrander, Sune G. Nielsen, Hayley J. Gadol, Luciana Villarroel, Scott D. Wankel, Tristan J. Horner, Jerzy Blusztajn, Collen M. Hansel

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Coupled vanadium and thallium isotope constraints on Mesoproterozoic ocean oxygenation around 1.38-1.39 Ga

Andy W. Heard, Yi Wang, Chadlin M. Ostrander, Maureen Auro, Donald E. Canfield, Shuichang Zhang, Huajian Wang, Xiaomei Wang, Sune G. Nielsen

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2022

Shale heavy metal isotope records of low environmental O2 between two Archean Oxidation Events

Chadlin M. Ostrander, Brian Kendall, Gwyneth W. Gordon, Sune G. Nielsen, Wang Zheng, Ariel D. Anbar

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Significance of 56Fe depletions in late-Archean shales and pyrite

Chadlin M. Ostrander, Silke Severmann, Gwyneth W. Gordon, Brian Kendall, Timothy W. Lyons, Wang Zheng, Moutusi Roy, Ariel D. Anbar

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2021

Reconciling evidence of oxidative weathering and atmospheric anoxia on Archean Earth

Aleisha C. Johnson, Chadlin M. Ostrander, Stephen J. Romaniello, Christopher T. Reinhard, Allison T. Greaney, Timothy W. Lyons, Ariel D. Anbar

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Earth's First Redox Revolution

Chadlin M. Ostrander, Aleisha C. Johnson, Ariel D. Anbar

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Vanadium isotope evidence for expansive ocean euxinia during the appearance of early Ediacara Biota

Haifeng Fan, Chadlin M. Ostrander, Maureen Auro, Hanjie Wen, Sune G. Nielsen

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2020

Thallium isotope ratios in shales from South China and northwestern Canada suggest widespread O2 accumulation in marine bottom waters was a very uncommon occurrence during the Ediacaran Period

Chadlin M. Ostrander, Jeremy D. Owens, Sune G. Nielsen, Timothy W. Lyons, Yunchao Shu, Xinming Chen, Erik A. Sperling, Ganqing Jiang, David T. Johnston, Swapan K. Sahoo, Ariel D. Anbar

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Molybdenum isotope and trace metal signals in an iron-rich Mesoproterozoic ocean: A snapshot from the Vindhyan Basin, India

Geoffrey J. Gilleaudeau, Swapan K. Sahoo, Chadlin M. Ostrander, Jeremy D. Owens, Simon W. Poulton, Timothy W. Lyons, Ariel D. Anbar

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An expanded shale δ98Mo record permits recurrent shallow marine oxygenation during the Neoarchean

Chadlin M. Ostrander, Brian Kendall, Stephanie L. Olson, Gwyneth W. Gordon, Stephen J. Romaniello, Timothy W. Lyons, Wang Zheng, Moutusi Roy, Christopher T. Reinhard, Ariel D. Anbar

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2019

Multiple negative molybdenum isotope excursions in the Doushantuo Formation (South China) fingerprint complex redox-related processes in the Ediacaran Nanhua Basin

Chadlin M. Ostrander, Swapan K. Sahoo, Brian Kendall, Ganqing Jiang, Noah J. Planavsky, Timothy W. Lyons, Sune G. Nielsen, Jeremy D. Owens, Gwyneth W. Gordon, Stephen J. Romaniello, Ariel D. Anbar

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Fully oxygenated water columns over continental shelves before the Great Oxidation Event

Chadlin M. Ostrander, Sune G. Nielsen, Jeremy D. Owens, Brian Kendall, Gwyneth W. Gordon, Stephen J. Romaniello, Ariel D. Anbar

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Volcanically modulated pyrite burial and ocean-atmosphere oxidation

Stephanie L. Olson, Chadlin M. Ostrander, Daniel D. Gregory, Moutusi Roy, Ariel D. Anbar, Timothy W. Lyons

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2018

Thallium isotope systematics in volcanic rocks from St. Helena – Constraints on the origin of the HIMU reservoir

Jerzy Blusztajn, Sune G. Nielsen, Horst Marshall, Yunchao Shu, Chadlin M. Ostrander, C.M., Takeshi Hanyu

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2017

Constraining the rate of oceanic deoxygenation leading up to a Cretaceous Oceanic Anoxic Event (OAE-2: ~94 Ma)

Chadlin M. Ostrander, Jeremy D. Owens, Sune G. Nielsen

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Thallium-isotopic compositions of euxinic sediments as a proxy for global manganese-oxide burial

Jeremy D. Owens, Sune G. Nielsen, Tristan J. Horner, Chadlin M. Ostrander, Larry Peterson

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