Articles | Volume 5, issue 2
https://doi.org/10.5194/gchron-5-301-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-5-301-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Cosmogenic 10Be in pyroxene: laboratory progress, production rate systematics, and application of the 10Be–3He nuclide pair in the Antarctic Dry Valleys
Allie Balter-Kennedy
CORRESPONDING AUTHOR
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Department of Earth and Environmental Sciences, Columbia University,
New York, NY 10027, USA
Joerg M. Schaefer
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Department of Earth and Environmental Sciences, Columbia University,
New York, NY 10027, USA
Roseanne Schwartz
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Jennifer L. Lamp
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Laura Penrose
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Jennifer Middleton
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Jean Hanley
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Bouchaïb Tibari
CRPG, CNRS, Université de Lorraine, 54 000 Nancy, France
Pierre-Henri Blard
CRPG, CNRS, Université de Lorraine, 54 000 Nancy, France
Gisela Winckler
Lamont–Doherty Earth Observatory, Columbia University, Palisades, NY 10964,
USA
Department of Earth and Environmental Sciences, Columbia University,
New York, NY 10027, USA
Alan J. Hidy
Department is Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
Greg Balco
Berkeley Geochronology Center, Berkeley, CA 94709, USA
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Geochronology, 7, 247–253, https://doi.org/10.5194/gchron-7-247-2025, https://doi.org/10.5194/gchron-7-247-2025, 2025
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EGUsphere, https://doi.org/10.5194/egusphere-2025-3033, https://doi.org/10.5194/egusphere-2025-3033, 2025
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We developed a faster and simpler way to measure helium gas in rocks to determine how long they have been exposed at Earth's surface. Instead of separating minerals within the rocks by hand, our method uses heat to release gas from specific minerals. This reduces time, cost, and physical work, making it easier to collect large amounts of data when studying landscape change or when only small rock samples are available.
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This preprint is open for discussion and under review for The Cryosphere (TC).
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Clim. Past, 21, 145–160, https://doi.org/10.5194/cp-21-145-2025, https://doi.org/10.5194/cp-21-145-2025, 2025
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Cosmogenic nuclide exposure dating is an exceptional tool for reconstructing glacier histories, but reconstructions based on common target nuclides (e.g., 10Be) can be costly and time-consuming to generate. Here, we present a cost-effective proof-of-concept 21Ne exposure age chronology from Lassen Volcanic National Park, CA, USA, that broadly agrees with nearby 10Be chronologies but at lower precision.
Greg Balco, Andrew J. Conant, Dallas D. Reilly, Dallin Barton, Chelsea D. Willett, and Brett H. Isselhardt
Geochronology, 6, 571–584, https://doi.org/10.5194/gchron-6-571-2024, https://doi.org/10.5194/gchron-6-571-2024, 2024
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This paper describes how krypton isotopes produced by nuclear fission can be used to determine the age of microscopic particles of used nuclear fuel. This is potentially useful for international safeguard applications aimed at tracking and identifying nuclear materials, as well as geoscience applications involving dating post-1950s sediments or understanding environmental transport of nuclear materials.
Allie Balter-Kennedy, Joerg M. Schaefer, Greg Balco, Meredith A. Kelly, Michael R. Kaplan, Roseanne Schwartz, Bryan Oakley, Nicolás E. Young, Jean Hanley, and Arianna M. Varuolo-Clarke
Clim. Past, 20, 2167–2190, https://doi.org/10.5194/cp-20-2167-2024, https://doi.org/10.5194/cp-20-2167-2024, 2024
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We date sedimentary deposits showing that the southeastern Laurentide Ice Sheet was at or near its southernmost extent from ~ 26 000 to 21 000 years ago, when sea levels were at their lowest, with climate records indicating glacial conditions. Slow deglaciation began ~ 22 000 years ago, shown by a rise in modeled local summer temperatures, but significant deglaciation in the region did not begin until ~ 18 000 years ago, when atmospheric CO2 began to rise, marking the end of the last ice age.
Marie Bergelin, Greg Balco, Lee B. Corbett, and Paul R. Bierman
Geochronology, 6, 491–502, https://doi.org/10.5194/gchron-6-491-2024, https://doi.org/10.5194/gchron-6-491-2024, 2024
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Cosmogenic nuclides, such as 10Be, are rare isotopes produced in rocks when exposed at Earth's surface and are valuable for understanding surface processes and landscape evolution. However, 10Be is usually measured in quartz minerals. Here we present advances in efficiently extracting and measuring 10Be in the pyroxene mineral. These measurements expand the use of 10Be as a dating tool for new rock types and provide opportunities to understand landscape processes in areas that lack quartz.
Alia J. Lesnek, Joseph M. Licciardi, Alan J. Hidy, and Tyler S. Anderson
Geochronology, 6, 475–489, https://doi.org/10.5194/gchron-6-475-2024, https://doi.org/10.5194/gchron-6-475-2024, 2024
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We present an improved workflow for extracting and measuring chlorine isotopes in rocks and minerals. Experiments on seven geologic samples demonstrate that our workflow provides reliable results while offering several distinct advantages over traditional methods. Most notably, our workflow reduces the amount of isotopically enriched chlorine spike used per rock sample by up to 95 %, which will allow researchers to analyze more samples using their existing laboratory supplies.
Benjamin A. Keisling, Joerg M. Schaefer, Robert M. DeConto, Jason P. Briner, Nicolás E. Young, Caleb K. Walcott, Gisela Winckler, Allie Balter-Kennedy, and Sridhar Anandakrishnan
EGUsphere, https://doi.org/10.5194/egusphere-2024-2427, https://doi.org/10.5194/egusphere-2024-2427, 2024
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Understanding how much the Greenland ice sheet melted in response to past warmth helps better predicting future sea-level change. Here we present a framework for using numerical ice-sheet model simulations to provide constraints on how much mass the ice sheet loses before different areas become ice-free. As observations from subglacial archives become more abundant, this framework can guide subglacial sampling efforts to gain the most robust information about past ice-sheet geometries.
Pedro Doll, Shaun Robert Eaves, Ben Matthew Kennedy, Pierre-Henri Blard, Alexander Robert Lee Nichols, Graham Sloan Leonard, Dougal Bruce Townsend, Jim William Cole, Chris Edward Conway, Sacha Baldwin, Gabriel Fénisse, Laurent Zimmermann, and Bouchaïb Tibari
Geochronology, 6, 365–395, https://doi.org/10.5194/gchron-6-365-2024, https://doi.org/10.5194/gchron-6-365-2024, 2024
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In this study, we use cosmogenic-sourced 3He to determine the eruption ages of 23 lava flows at Mt Ruapehu, Aotearoa New Zealand, and we show how this method can help overcome challenges associated with traditional dating methods in young lavas. Comparison with other methods demonstrates the accuracy of our data and the method's reliability. The new eruption ages allowed us to identify periods of quasi-simultaneous activity from different volcanic vents during the last 20 000 years.
Jennifer L. Middleton, Julia Gottschalk, Gisela Winckler, Jean Hanley, Carol Knudson, Jesse R. Farmer, Frank Lamy, Lorraine E. Lisiecki, and Expedition 383 Scientists
Geochronology, 6, 125–145, https://doi.org/10.5194/gchron-6-125-2024, https://doi.org/10.5194/gchron-6-125-2024, 2024
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We present oxygen isotope data for a new sediment core from the South Pacific and assign ages to our record by aligning distinct patterns in observed oxygen isotope changes to independently dated target records with the same patterns. We examine the age uncertainties associated with this approach caused by human vs. automated alignment and the sensitivity of outcomes to the choice of alignment target. These efforts help us understand the timing of past climate changes.
Joseph P. Tulenko, Jason P. Briner, Nicolás E. Young, and Joerg M. Schaefer
Clim. Past, 20, 625–636, https://doi.org/10.5194/cp-20-625-2024, https://doi.org/10.5194/cp-20-625-2024, 2024
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We take advantage of a site in Alaska – where climate records are limited and a former alpine glacier deposited a dense sequence of moraines spanning the full deglaciation – to construct a proxy summer temperature record. Building on age constraints for moraines in the valley, we reconstruct paleo-glacier surfaces and estimate the summer temperatures (relative to the Little Ice Age) for each moraine. The record suggests that the influence of North Atlantic climate forcing extended to Alaska.
Greg Balco, Alan J. Hidy, William T. Struble, and Joshua J. Roering
Geochronology, 6, 71–76, https://doi.org/10.5194/gchron-6-71-2024, https://doi.org/10.5194/gchron-6-71-2024, 2024
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We describe a new method of reconstructing the long-term, pre-observational frequency and/or intensity of wildfires in forested landscapes using trace concentrations of the noble gases helium and neon that are formed in soil mineral grains by cosmic-ray bombardment of the Earth's surface.
Jacob T. H. Anderson, Toshiyuki Fujioka, David Fink, Alan J. Hidy, Gary S. Wilson, Klaus Wilcken, Andrey Abramov, and Nikita Demidov
The Cryosphere, 17, 4917–4936, https://doi.org/10.5194/tc-17-4917-2023, https://doi.org/10.5194/tc-17-4917-2023, 2023
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Antarctic permafrost processes are not widely studied or understood in the McMurdo Dry Valleys. Our data show that near-surface permafrost sediments were deposited ~180 000 years ago in Pearse Valley, while in lower Wright Valley sediments are either vertically mixed after deposition or were deposited < 25 000 years ago. Our data also record Taylor Glacier retreat from Pearse Valley ~65 000–74 000 years ago and support antiphase dynamics between alpine glaciers and sea ice in the Ross Sea.
Brandon L. Graham, Jason P. Briner, Nicolás E. Young, Allie Balter-Kennedy, Michele Koppes, Joerg M. Schaefer, Kristin Poinar, and Elizabeth K. Thomas
The Cryosphere, 17, 4535–4547, https://doi.org/10.5194/tc-17-4535-2023, https://doi.org/10.5194/tc-17-4535-2023, 2023
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Glacial erosion is a fundamental process operating on Earth's surface. Two processes of glacial erosion, abrasion and plucking, are poorly understood. We reconstructed rates of abrasion and quarrying in Greenland. We derive a total glacial erosion rate of 0.26 ± 0.16 mm per year. We also learned that erosion via these two processes is about equal. Because the site is similar to many other areas covered by continental ice sheets, these results may be applied to many places on Earth.
Adam C. Hawkins, Brian Menounos, Brent M. Goehring, Gerald Osborn, Ben M. Pelto, Christopher M. Darvill, and Joerg M. Schaefer
The Cryosphere, 17, 4381–4397, https://doi.org/10.5194/tc-17-4381-2023, https://doi.org/10.5194/tc-17-4381-2023, 2023
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Our study developed a record of glacier and climate change in the Mackenzie and Selwyn mountains of northwestern Canada over the past several hundred years. We estimate temperature change in this region using several methods and incorporate our glacier record with models of climate change to estimate how glacier volume in our study area has changed over time. Models of future glacier change show that our study area will become largely ice-free by the end of the 21st century.
Benoit S. Lecavalier, Lev Tarasov, Greg Balco, Perry Spector, Claus-Dieter Hillenbrand, Christo Buizert, Catherine Ritz, Marion Leduc-Leballeur, Robert Mulvaney, Pippa L. Whitehouse, Michael J. Bentley, and Jonathan Bamber
Earth Syst. Sci. Data, 15, 3573–3596, https://doi.org/10.5194/essd-15-3573-2023, https://doi.org/10.5194/essd-15-3573-2023, 2023
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The Antarctic Ice Sheet Evolution constraint database version 2 (AntICE2) consists of a large variety of observations that constrain the evolution of the Antarctic Ice Sheet over the last glacial cycle. This includes observations of past ice sheet extent, past ice thickness, past relative sea level, borehole temperature profiles, and present-day bedrock displacement rates. The database is intended to improve our understanding of past Antarctic changes and for ice sheet model calibrations.
Greg Balco, Nathan Brown, Keir Nichols, Ryan A. Venturelli, Jonathan Adams, Scott Braddock, Seth Campbell, Brent Goehring, Joanne S. Johnson, Dylan H. Rood, Klaus Wilcken, Brenda Hall, and John Woodward
The Cryosphere, 17, 1787–1801, https://doi.org/10.5194/tc-17-1787-2023, https://doi.org/10.5194/tc-17-1787-2023, 2023
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Samples of bedrock recovered from below the West Antarctic Ice Sheet show that part of the ice sheet was thinner several thousand years ago than it is now and subsequently thickened. This is important because of concern that present ice thinning in this region may lead to rapid, irreversible sea level rise. The past episode of thinning at this site that took place in a similar, although not identical, climate was not irreversible; however, reversal required at least 3000 years to complete.
Anna Ruth W. Halberstadt, Greg Balco, Hannah Buchband, and Perry Spector
The Cryosphere, 17, 1623–1643, https://doi.org/10.5194/tc-17-1623-2023, https://doi.org/10.5194/tc-17-1623-2023, 2023
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This paper explores the use of multimillion-year exposure ages from Antarctic bedrock outcrops to benchmark ice sheet model predictions and thereby infer ice sheet sensitivity to warm climates. We describe a new approach for model–data comparison, highlight an example where observational data are used to distinguish end-member models, and provide guidance for targeted sampling around Antarctica that can improve understanding of ice sheet response to climate warming in the past and future.
Jonathan R. Adams, Joanne S. Johnson, Stephen J. Roberts, Philippa J. Mason, Keir A. Nichols, Ryan A. Venturelli, Klaus Wilcken, Greg Balco, Brent Goehring, Brenda Hall, John Woodward, and Dylan H. Rood
The Cryosphere, 16, 4887–4905, https://doi.org/10.5194/tc-16-4887-2022, https://doi.org/10.5194/tc-16-4887-2022, 2022
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Glaciers in West Antarctica are experiencing significant ice loss. Geological data provide historical context for ongoing ice loss in West Antarctica, including constraints on likely future ice sheet behaviour in response to climatic warming. We present evidence from rare isotopes measured in rocks collected from an outcrop next to Pope Glacier. These data suggest that Pope Glacier thinned faster and sooner after the last ice age than previously thought.
Benjamin J. Stoker, Martin Margold, John C. Gosse, Alan J. Hidy, Alistair J. Monteath, Joseph M. Young, Niall Gandy, Lauren J. Gregoire, Sophie L. Norris, and Duane Froese
The Cryosphere, 16, 4865–4886, https://doi.org/10.5194/tc-16-4865-2022, https://doi.org/10.5194/tc-16-4865-2022, 2022
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The Laurentide Ice Sheet was the largest ice sheet to grow and disappear in the Northern Hemisphere during the last glaciation. In northwestern Canada, it covered the Mackenzie Valley, blocking the migration of fauna and early humans between North America and Beringia and altering the drainage systems. We reconstruct the timing of ice sheet retreat in this region and the implications for the migration of early humans into North America, the drainage of glacial lakes, and past sea level rise.
Natacha Gribenski, Marissa M. Tremblay, Pierre G. Valla, Greg Balco, Benny Guralnik, and David L. Shuster
Geochronology, 4, 641–663, https://doi.org/10.5194/gchron-4-641-2022, https://doi.org/10.5194/gchron-4-641-2022, 2022
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We apply quartz 3He paleothermometry along two deglaciation profiles in the European Alps to reconstruct temperature evolution since the Last Glacial Maximum. We observe a 3He thermal signal clearly colder than today in all bedrock surface samples exposed prior the Holocene. Current uncertainties in 3He diffusion kinetics do not permit distinguishing if this signal results from Late Pleistocene ambient temperature changes or from recent ground temperature variation due to permafrost degradation.
Jason P. Briner, Caleb K. Walcott, Joerg M. Schaefer, Nicolás E. Young, Joseph A. MacGregor, Kristin Poinar, Benjamin A. Keisling, Sridhar Anandakrishnan, Mary R. Albert, Tanner Kuhl, and Grant Boeckmann
The Cryosphere, 16, 3933–3948, https://doi.org/10.5194/tc-16-3933-2022, https://doi.org/10.5194/tc-16-3933-2022, 2022
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The 7.4 m of sea level equivalent stored as Greenland ice is getting smaller every year. The uncertain trajectory of ice loss could be better understood with knowledge of the ice sheet's response to past climate change. Within the bedrock below the present-day ice sheet is an archive of past ice-sheet history. We analyze all available data from Greenland to create maps showing where on the ice sheet scientists can drill, using currently available drills, to obtain sub-ice materials.
Marie Bergelin, Jaakko Putkonen, Greg Balco, Daniel Morgan, Lee B. Corbett, and Paul R. Bierman
The Cryosphere, 16, 2793–2817, https://doi.org/10.5194/tc-16-2793-2022, https://doi.org/10.5194/tc-16-2793-2022, 2022
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Glacier ice contains information on past climate and can help us understand how the world changes through time. We have found and sampled a buried ice mass in Antarctica that is much older than most ice on Earth and difficult to date. Therefore, we developed a new dating application which showed the ice to be 3 million years old. Our new dating solution will potentially help to date other ancient ice masses since such old glacial ice could yield data on past environmental conditions on Earth.
Mae Kate Campbell, Paul R. Bierman, Amanda H. Schmidt, Rita Sibello Hernández, Alejandro García-Moya, Lee B. Corbett, Alan J. Hidy, Héctor Cartas Águila, Aniel Guillén Arruebarrena, Greg Balco, David Dethier, and Marc Caffee
Geochronology, 4, 435–453, https://doi.org/10.5194/gchron-4-435-2022, https://doi.org/10.5194/gchron-4-435-2022, 2022
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We used cosmogenic radionuclides in detrital river sediment to measure erosion rates of watersheds in central Cuba; erosion rates are lower than rock dissolution rates in lowland watersheds. Data from two different cosmogenic nuclides suggest that some basins may have a mixed layer deeper than is typically modeled and could have experienced significant burial after or during exposure. We conclude that significant mass loss may occur at depth through chemical weathering processes.
Joanne S. Johnson, Ryan A. Venturelli, Greg Balco, Claire S. Allen, Scott Braddock, Seth Campbell, Brent M. Goehring, Brenda L. Hall, Peter D. Neff, Keir A. Nichols, Dylan H. Rood, Elizabeth R. Thomas, and John Woodward
The Cryosphere, 16, 1543–1562, https://doi.org/10.5194/tc-16-1543-2022, https://doi.org/10.5194/tc-16-1543-2022, 2022
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Recent studies have suggested that some portions of the Antarctic Ice Sheet were less extensive than present in the last few thousand years. We discuss how past ice loss and regrowth during this time would leave its mark on geological and glaciological records and suggest ways in which future studies could detect such changes. Determining timing of ice loss and gain around Antarctica and conditions under which they occurred is critical for preparing for future climate-warming-induced changes.
Leah A. VanLandingham, Eric W. Portenga, Edward C. Lefroy, Amanda H. Schmidt, Paul R. Bierman, and Alan J. Hidy
Geochronology, 4, 153–176, https://doi.org/10.5194/gchron-4-153-2022, https://doi.org/10.5194/gchron-4-153-2022, 2022
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This study presents erosion rates of the George River and seven of its tributaries in northeast Tasmania, Australia. These erosion rates are the first measures of landscape change over millennial timescales for Tasmania. We demonstrate that erosion is closely linked to a topographic rainfall gradient across George River. Our findings may be useful for efforts to restore ecological health to Georges Bay by determining a pre-disturbance level of erosion and sediment delivery to this estuary.
María H. Toyos, Gisela Winckler, Helge W. Arz, Lester Lembke-Jene, Carina B. Lange, Gerhard Kuhn, and Frank Lamy
Clim. Past, 18, 147–166, https://doi.org/10.5194/cp-18-147-2022, https://doi.org/10.5194/cp-18-147-2022, 2022
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Past export production in the southeast Pacific and its link to Patagonian ice dynamics is unknown. We reconstruct biological productivity changes at the Pacific entrance to the Drake Passage, covering the past 400 000 years. We show that glacial–interglacial variability in export production responds to glaciogenic Fe supply from Patagonia and silica availability due to shifts in oceanic fronts, whereas dust, as a source of lithogenic material, plays a minor role.
Irene Schimmelpfennig, Joerg M. Schaefer, Jennifer Lamp, Vincent Godard, Roseanne Schwartz, Edouard Bard, Thibaut Tuna, Naki Akçar, Christian Schlüchter, Susan Zimmerman, and ASTER Team
Clim. Past, 18, 23–44, https://doi.org/10.5194/cp-18-23-2022, https://doi.org/10.5194/cp-18-23-2022, 2022
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Small mountain glaciers advance and recede as a response to summer temperature changes. Dating of glacial landforms with cosmogenic nuclides allowed us to reconstruct the advance and retreat history of an Alpine glacier throughout the past ~ 11 000 years, the Holocene. The results contribute knowledge to the debate of Holocene climate evolution, indicating that during most of this warm period, summer temperatures were similar to or warmer than in modern times.
Jamey Stutz, Andrew Mackintosh, Kevin Norton, Ross Whitmore, Carlo Baroni, Stewart S. R. Jamieson, Richard S. Jones, Greg Balco, Maria Cristina Salvatore, Stefano Casale, Jae Il Lee, Yeong Bae Seong, Robert McKay, Lauren J. Vargo, Daniel Lowry, Perry Spector, Marcus Christl, Susan Ivy Ochs, Luigia Di Nicola, Maria Iarossi, Finlay Stuart, and Tom Woodruff
The Cryosphere, 15, 5447–5471, https://doi.org/10.5194/tc-15-5447-2021, https://doi.org/10.5194/tc-15-5447-2021, 2021
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Understanding the long-term behaviour of ice sheets is essential to projecting future changes due to climate change. In this study, we use rocks deposited along the margin of the David Glacier, one of the largest glacier systems in the world, to reveal a rapid thinning event initiated over 7000 years ago and endured for ~ 2000 years. Using physical models, we show that subglacial topography and ocean heat are important drivers for change along this sector of the Antarctic Ice Sheet.
Sandra M. Braumann, Joerg M. Schaefer, Stephanie M. Neuhuber, Christopher Lüthgens, Alan J. Hidy, and Markus Fiebig
Clim. Past, 17, 2451–2479, https://doi.org/10.5194/cp-17-2451-2021, https://doi.org/10.5194/cp-17-2451-2021, 2021
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Glacier reconstructions provide insights into past climatic conditions and elucidate processes and feedbacks that modulate the climate system both in the past and present. We investigate the transition from the last glacial to the current interglacial and generate beryllium-10 moraine chronologies in glaciated catchments of the eastern European Alps. We find that rapid warming was superimposed by centennial-scale cold phases that appear to have influenced large parts of the Northern Hemisphere.
Andrew J. Christ, Paul R. Bierman, Jennifer L. Lamp, Joerg M. Schaefer, and Gisela Winckler
Geochronology, 3, 505–523, https://doi.org/10.5194/gchron-3-505-2021, https://doi.org/10.5194/gchron-3-505-2021, 2021
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Cosmogenic nuclide surface exposure dating is commonly used to constrain the timing of past glacier extents. However, Antarctic exposure age datasets are often scattered and difficult to interpret. We compile new and existing exposure ages of a glacial deposit with independently known age constraints and identify surface processes that increase or reduce the likelihood of exposure age scatter. Then we present new data for a previously unmapped and undated older deposit from the same region.
Nicolás E. Young, Alia J. Lesnek, Josh K. Cuzzone, Jason P. Briner, Jessica A. Badgeley, Alexandra Balter-Kennedy, Brandon L. Graham, Allison Cluett, Jennifer L. Lamp, Roseanne Schwartz, Thibaut Tuna, Edouard Bard, Marc W. Caffee, Susan R. H. Zimmerman, and Joerg M. Schaefer
Clim. Past, 17, 419–450, https://doi.org/10.5194/cp-17-419-2021, https://doi.org/10.5194/cp-17-419-2021, 2021
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Retreat of the Greenland Ice Sheet (GrIS) margin is exposing a bedrock landscape that holds clues regarding the timing and extent of past ice-sheet minima. We present cosmogenic nuclide measurements from recently deglaciated bedrock surfaces (the last few decades), combined with a refined chronology of southwestern Greenland deglaciation and model simulations of GrIS change. Results suggest that inland retreat of the southwestern GrIS margin was likely minimal in the middle to late Holocene.
Greg Balco, Benjamin D. DeJong, John C. Ridge, Paul R. Bierman, and Dylan H. Rood
Geochronology, 3, 1–33, https://doi.org/10.5194/gchron-3-1-2021, https://doi.org/10.5194/gchron-3-1-2021, 2021
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The North American Varve Chronology (NAVC) is a sequence of 5659 annual sedimentary layers that were deposited in proglacial lakes adjacent to the retreating Laurentide Ice Sheet ca. 12 500–18 200 years ago. We attempt to synchronize this record with Greenland ice core and other climate records that cover the same time period by detecting variations in global fallout of atmospherically produced beryllium-10 in NAVC sediments.
Cited articles
Ackert, R. P.: Antarctic glacial chronology: new constraints from surface
exposure dating, Doctoral thesis, Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, Woods Hole Open Access Server, https://doi.org/10.1575/1912/4123, 2000.
Ackert, R. P. and Kurz, M. D.: Age and uplift rates of Sirius Group
sediments in the Dominion Range, Antarctica, from surface exposure dating
and geomorphology, Global Planet. Change, 42, 207–225,
https://doi.org/10.1016/j.gloplacha.2004.02.001, 2004.
Andrews, J. N. and Kay, R. L. F.: Natural production of tritium in permeable
rocks, Nature, 298, 361–363, https://doi.org/10.1038/298361a0, 1982.
Argento, D. C., Stone, J. O., Reedy, R. C., and O'Brien, K.: Physics-based
modeling of cosmogenic nuclides part II – Key aspects of in-situ cosmogenic
nuclide production, Quat Geochronol, 26, 44–55,
https://doi.org/10.1016/j.quageo.2014.09.005, 2015.
Balco, G.: Production rate calculations for cosmic-ray-muon-produced 10Be
and 26Al benchmarked against geological calibration data, Quat. Geochronol.,
39, 150–173, https://doi.org/10.1016/j.quageo.2017.02.001, 2017.
Balco, G.: Noncosmogenic helium-3 in pyroxene and Antarctic exposure dating:
https://cosmognosis.wordpress.com/2020/08/22/noncosmogenic-helium-3-in-pyroxene-and-antarctic-exposure-dating/,
last access: 23 June 2022, 2020.
Balco, G. and Shuster, D. L.: 26Al–10Be–21Ne burial dating, Earth Planet. Sc. Lett., 286, 570–575, https://doi.org/10.1016/j.epsl.2009.07.025, 2009.
Balco, G. and Rovey, C. W.: Absolute chronology for major Pleistocene
advances of the Laurentide Ice Sheet, Geology, 38, 795–798,
https://doi.org/10.1130/g30946.1, 2010.
Balco, G., Stone, J. O., Lifton, N. A., and Dunai, T. J.: A complete and
easily accessible means of calculating surface exposure ages or erosion
rates from 10Be and 26Al measurements, Quat. Geochronol., 3, 174–195,
https://doi.org/10.1016/j.quageo.2007.12.001, 2008.
Balco, G., Blard, P.-H., Shuster, D. L., Stone, J. O. H., and Zimmermann,
L.: Cosmogenic and nucleogenic 21Ne in quartz in a 28-meter sandstone core
from the McMurdo Dry Valleys, Antarctica, Quat. Geochronol., 52, 63–76,
https://doi.org/10.1016/j.quageo.2019.02.006, 2019.
Balter-Kennedy, A. and Balco, G.: Code supporting Cosmogenic 10Be in pyroxene: laboratory progress, production rate systematics, and application of the 10Be–3He nuclide pair in the Antarctic Dry Valleys, Zenodo [code], https://doi.org/10.5281/zenodo.8125448, 2023.
Balter-Kennedy, A., Bromley, G., Balco, G., Thomas, H., and Jackson, M. S.: A 14.5-million-year record of East Antarctic Ice Sheet fluctuations from the central Transantarctic Mountains, constrained with cosmogenic 3Be, 10Be,
21Ne, and 26Al, The Cryosphere, 14, 2647–2672, https://doi.org/10.5194/tc-14-2647-2020, 2020.
Bindschadler, R., Vornberger, P., Fleming, A., Fox, A., Mullins, J., Binnie,
D., Paulsen, S. J., Granneman, B., and Gorodetzky, D.: The Landsat Image
Mosaic of Antarctica, Remote Sens Environ, 112, 4214–4226,
https://doi.org/10.1016/j.rse.2008.07.006, 2008.
Blard, P.-H.: Cosmogenic 3He in terrestrial rocks: A review, Chem. Geol., 586,
120543, https://doi.org/10.1016/j.chemgeo.2021.120543, 2021.
Blard, P.-H., Pik, R., Lavé, J., Bourlès, D., Burnard, P. G.,
Yokochi, R., Marty, B., and Trusdell, F.: Cosmogenic 3He production rates
revisited from evidences of grain size dependent release of matrix-sited
helium, Earth Planet. Sc. Lett., 247, 222–234,
https://doi.org/10.1016/j.epsl.2006.05.012, 2006.
Blard, P.-H., Bourlès, D., Pik, R., and Lavé, J.: In situ cosmogenic
10Be in olivines and pyroxenes, Quat. Geochronol., 3, 196–205,
https://doi.org/10.1016/j.quageo.2007.11.006, 2008.
Blard, P.-H., Balco, G., Burnard, P. G., Farley, K. A., Fenton, C. R.,
Friedrich, R., Jull, A. J. T., Niedermann, S., Pik, R., Schaefer, J. M.,
Scott, E. M., Shuster, D. L., Stuart, F. M., Stute, M., Tibari, B.,
Winckler, G., and Zimmermann, L.: An inter-laboratory comparison of
cosmogenic 3He and radiogenic 4He in the CRONUS-P pyroxene standard, Quat.
Geochronol., 26, 11–19, https://doi.org/10.1016/j.quageo.2014.08.004, 2015.
Borchers, B., Marrero, S., Balco, G., Caffee, M., Goehring, B., Lifton, N.,
Nishiizumi, K., Phillips, F., Schaefer, J., and Stone, J.: Geological
calibration of spallation production rates in the CRONUS-Earth project, Quat.
Geochronol., 31, 188–198, https://doi.org/10.1016/j.quageo.2015.01.009,
2016.
Bromley, G. R. M., Hall, B. L., Schaefer, J. M., Winckler, G., Todd, C. E.,
and Rademaker, K. M.: Glacier fluctuations in the southern Peruvian Andes
during the late-glacial period, constrained with cosmogenic 3He, J.
Quat. Sci., 26, 37–43, https://doi.org/10.1002/jqs.1424, 2011.
Bromley, G. R. M., Winckler, G., Schaefer, J. M., Kaplan, M. R., Licht, K.
J., and Hall, B. L.: Pyroxene separation by HF leaching and its impact on
helium surface-exposure dating, Quat. Geochronol., 23, 1–8,
https://doi.org/10.1016/j.quageo.2014.04.003, 2014.
Brown, E. T., Edmond, J. M., Raisbeck, G. M., Yiou, F., Kurz, M. D., and
Brook, E. J.: Examination of surface exposure ages of Antarctic moraines
using in situ produced 10Be and 26Al, Geochim. Cosmochim. Ac., 55, 2269–2283,
https://doi.org/10.1016/0016-7037(91)90103-c, 1991.
Brown, E. T., Brook, E. J., Raisbeck, G. M., Yiou, F., and Kurz, M. D.:
Effective attenuation lengths of cosmic rays producing 10Be and 26Al in
quartz: Implications for exposure age dating, Geophys. Res. Lett., 19,
369–372, https://doi.org/10.1029/92gl00266, 1992.
Bruno, L. A., Baur, H., Graf, T., Schlüchter, C., Signer,
P., and Wieler, R.: Dating of Sirius Group tillites in the Antarctic Dry
Valleys with cosmogenic 3He and 21Ne, Earth Planet. Sc. Lett., 147, 37–54,
https://doi.org/10.1016/s0012-821x(97)00003-4, 1997.
Burgess, S. D., Bowring, S. A., Fleming, T. H., and Elliot, D. H.:
High-precision geochronology links the Ferrar large igneous province with
early-Jurassic ocean anoxia and biotic crisis, Earth Planet. Sc. Lett., 415,
90–99, https://doi.org/10.1016/j.epsl.2015.01.037, 2015.
Cerling, T. E.: Dating geomorphologic surfaces using cosmogenic 3He,
Quat. Res., 33, 148–156, https://doi.org/10.1016/0033-5894(90)90015-d,
1990.
Cerling, T. E.: Geomorphology and In-Situ Cosmogenic Isotopes, Annu. Rev. Earth Pl. Sc., 22, 273–317, https://doi.org/10.1146/annurev.earth.22.1.273, 1994.
Chmeleff, J., Blanckenburg, F. von, Kossert, K., and Jakob, D.:
Determination of the 10Be half-life by multicollector ICP-MS and liquid
scintillation counting, Nucl. Instruments Methods Phys. Res. Sect B., 268, 192–199,
https://doi.org/10.1016/j.nimb.2009.09.012, 2010.
Denton, G. H. and Sugden, D. E.: Meltwater features that suggest Miocene
ice-sheet overriding of the Transantarctic Mountains in Victoria Land,
Antarctica, Geogr. Ann, Ser. Phys. Geogr., 87, 67–85,
https://doi.org/10.1111/j.0435-3676.2005.00245.x, 2005.
Denton, G. H., Sugden, D. E., Marchant, D. R., Hall, B. L., and Wilch, T.
I.: East Antarctic Ice Sheet Sensitivity to Pliocene Climatic Change from a
Dry Valleys Perspective, Geogr. Ann, Ser. Phys. Geogr., 75, 155–204,
https://doi.org/10.2307/521200, 1993.
Dunai, T. J.: Cosmogenic Nuclides, https://doi.org/10.1017/cbo9780511804519,
2010.
Eaves, S. R., Collins, J. A., Jones, R. S., Norton, K. P., Tims, S. G., and
Mackintosh, A. N.: Further constraint of the in situ cosmogenic 10Be
production rate in pyroxene and a viability test for late Quaternary
exposure dating, Quat. Geochronol., 48, 121–132,
https://doi.org/10.1016/j.quageo.2018.09.006, 2018.
Egidy, T. and von and Hartmann, F. J.: Average muonic Coulomb capture
probabilities for 65 elements, Phys. Rev. A, 26, 2355–2360,
https://doi.org/10.1103/physreva.26.2355, 1982.
Fink, D. and Smith, A.: An inter-comparison of 10Be and 26Al AMS reference
standards and the 10Be half-life, Nucl. Instruments Methods Phys. Res. Sect B., 259, 600–609,
https://doi.org/10.1016/j.nimb.2007.01.299, 2007.
Gayer, E., Pik, R., Lavé, J., France-Lanord, C., Bourlès, D., and
Marty, B.: Cosmogenic 3He in Himalayan garnets indicating an altitude
dependence of the 3He 10Be production ratio, Earth Planet. Sc. Lett., 229,
91–104, https://doi.org/10.1016/j.epsl.2004.10.009, 2004.
Goehring, B. M., Kurz, M. D., Balco, G., Schaefer, J. M., Licciardi, J., and
Lifton, N.: A reevaluation of in situ cosmogenic 3He production rates, Quat.
Geochronol., 5, 410–418, https://doi.org/10.1016/j.quageo.2010.03.001, 2010.
Gosse, J. C. and Phillips, F. M.: Terrestrial in situ cosmogenic nuclides:
theory and application, Quat. Sci. Rev., 20, 1475–1560,
https://doi.org/10.1016/s0277-3791(00)00171-2, 2001.
Granger, D. E.: A review of burial dating methods using 26Al and 10Be, in:
In Situ-Produced Cosmogenic Nuclides and Quantification of Geological
Processes: Geological Society of America Special Paper 415, edited by:
Siame, L. L., Bourlès, D. L., and Brown, 1–16,
https://doi.org/10.1130/2006.2415(01), 2006.
Heisinger, B., Lal, D., Jull, A. J. T., Kubik, P., Ivy-Ochs, S., Neumaier,
S., Knie, K., Lazarev, V., and Nolte, E.: Production of selected cosmogenic
radionuclides by muons 1. Fast muons, Earth Planet. Sc. Lett., 200, 345–355,
https://doi.org/10.1016/s0012-821x(02)00640-4, 2002a.
Heisinger, B., Lal, D., Jull, A. J. T., Kubik, P., Ivy-Ochs, S., Knie, K.,
and Nolte, E.: Production of selected cosmogenic radionuclides by muons: 2.
Capture of negative muons, Earth Planet. Sc. Lett., 200, 357–369,
https://doi.org/10.1016/s0012-821x(02)00641-6, 2002b.
Hippe, K.: Constraining processes of landscape change with combined in situ
cosmogenic 14C-10Be analysis, Quat. Sci. Rev., 173, 1–19,
https://doi.org/10.1016/j.quascirev.2017.07.020, 2017.
Ivy-Ochs, S., Kubik, P. W., Masarik, J., Wieler, R., Bruno, L., and
Schlüchter, C.: Preliminary results on the use of pyroxene for 10Be
surface exposure dating, Schweiz, Mineral. Petrogr. Mitt., 78, 375–382, 1998.
Ivy-Ochs, S., Schlüchter, C., Kubik, P. W.,
Dittrich-Hannen, B., and Beer, J.: Minimum 10Be exposure ages of early
Pliocene for the Table Mountain plateau and the Sirius Group at Mount
Fleming, Dry Valleys, Antarctica, Geology, 23, 1007–1010,
https://doi.org/10.1130/0091-7613(1995)023<1007:mbeaoe>2.3.co;2, 1995.
Kaplan, M. R., Licht, K. J., Winckler, G., Schaefer, J. M., Bader, N.,
Mathieson, C., Roberts, M., Kassab, C. M., Schwartz, R., and Graly, J. A.:
Middle to Late Pleistocene stability of the central East Antarctic Ice Sheet
at the head of Law Glacier, Geology, 45, 963–966,
https://doi.org/10.1130/g39189.1, 2017.
Kohl, C. P. and Nishiizumi, K.: Chemical isolation of quartz for measurement
of in-situ -produced cosmogenic nuclides, Geochim. Cosmochim. Ac., 56,
3583–3587, https://doi.org/10.1016/0016-7037(92)90401-4, 1992.
Kurz, M. D.: Cosmogenic helium in a terrestrial igneous rock, Nature, 320,
435–439, https://doi.org/10.1038/320435a0, 1986.
Kurz, M. D. and Brook, E. J.: Surface exposure dating with cosmogenic
nuclides, in: Dating in exposed and surface contexts, 139–159, 1994.
Lal, D.: Production of 3He in terrestrial rocks, Chem Geology Isotope
Geosci. Sect., 66, 89–98, https://doi.org/10.1016/0168-9622(87)90031-5,
1987.
Lal, D.: Cosmic ray labeling of erosion surfaces: in situ nuclide production
rates and erosion models, Earth Planet. Sc. Lett., 104, 424–439,
https://doi.org/10.1016/0012-821x(91)90220-c, 1991.
Lamp, J. L., Marchant, D. R., Mackay, S. L., and Head, J. W.: Thermal stress
weathering and the spalling of Antarctic rocks, J. Geophys. Res.-Ea.,
122, 3–24, https://doi.org/10.1002/2016jf003992, 2017.
Larsen, I. J., Farley, K. A., Lamb, M. P., and Pritchard, C. J.: Empirical
evidence for cosmogenic 3He production by muons, Earth Planet. Sc. Lett., 562,
116825, https://doi.org/10.1016/j.epsl.2021.116825, 2021.
Lewis, A. R., Marchant, D. R., Kowalewski, D. E., Baldwin, S. L., and Webb,
L. E.: The age and origin of the Labyrinth, western Dry Valleys, Antarctica:
Evidence for extensive middle Miocene subglacial floods and freshwater
discharge to the Southern Ocean, Geology, 34, 513–516,
https://doi.org/10.1130/g22145.1, 2006.
Margerison, H. R., Phillips, W. M., Stuart, F. M., and Sugden, D. E.:
Cosmogenic 3He concentrations in ancient flood deposits from the Coombs
Hills, northern Dry Valleys, East Antarctica: interpreting exposure ages and
erosion rates, Earth Planet. Sc. Lett., 230, 163–175,
https://doi.org/10.1016/j.epsl.2004.11.007, 2005.
Matsuda, J., Matsumoto, T., Sumino, H., Nagao, K., Yamamoto, J., Miura, Y.,
Kaneoka, I., Takahata, N., and Sano, Y.: The 3He 4He ratio of the new
internal He Standard of Japan (HESJ), Geochem J., 36, 191–195,
https://doi.org/10.2343/geochemj.36.191, 2002.
Matsuoka, K., Skoglund, A., Roth, G., Pomereu, J. de, Griffiths, H.,
Headland, R., Herried, B., Katsumata, K., Brocq, A. L., Licht, K., Morgan,
F., Neff, P. D., Ritz, C., Scheinert, M., Tamura, T., Putte, A. V. de,
Broeke, M. van den, Deschwanden, A. von, Deschamps-Berger, C., Liefferinge,
B. V., Tronstad, S., and Melvær, Y.: Quantarctica, an integrated mapping
environment for Antarctica, the Southern Ocean, and sub-Antarctic islands,
Environ Model. Softw., 140, 105015,
https://doi.org/10.1016/j.envsoft.2021.105015, 2021.
McKelvey, B. C. and Webb, P. N.: Geological investigations in southern
Victoria Land, Antarctica, New Zeal J. Geol. Geop., 5, 143–162,
https://doi.org/10.1080/00288306.1962.10420116, 1962.
Middleton, J. L., Ackert, R. P., and Mukhopadhyay, S.: Pothole and channel
system formation in the McMurdo Dry Valleys of Antarctica: New insights from
cosmogenic nuclides, Earth Planet. Sc. Lett., 355, 341–350,
https://doi.org/10.1016/j.epsl.2012.08.017, 2012.
Nespolo, M.: Reference Module in Earth Systems and Environmental Sciences, Encyclopedia of Geology, 2nd Edn.,
287–296, https://doi.org/10.1016/b978-0-12-409548-9.12409-1, 2020.
Nesterenok, A. V. and Yakubovich, O. V.: Production of
3He in Rocks by Reactions Induced by Particles of the Nuclear-Active and
Muon Components of Cosmic Rays: Geological and Petrological Implications,
Arxiv, https://doi.org/10.48550/arxiv.1607.08770, 2016.
Niedermann, S., Schaefer, J. M., Wieler, R., and Naumann, R.: The production
rate of cosmogenic 38Ar from calcium in terrestrial pyroxene, Earth Planet. Sc. Lett., 257, 596–608, https://doi.org/10.1016/j.epsl.2007.03.020, 2007.
Nishiizumi, K., Imamura, M., Caffee, M. W., Southon, J. R., Finkel, R. C.,
and McAninch, J.: Absolute calibration of 10Be AMS standards, Nucl.
Instruments Methods Phys. Res. Sect. B., 258,
403–413, https://doi.org/10.1016/j.nimb.2007.01.297, 2007.
Nishiizumi, K., Klein, J., Middleton, R., and Craig, H.:
Cosmogenic10Be, 26Al, and 3He in olivine from Maui lavas, Earth Planet. Sc. Lett., 98, 263–266, https://doi.org/10.1016/0012-821x(90)90028-v, 1990.
Nishiizumi, K., Kohl, C. P., Arnold, J. R., Klein, J., Fink, D., and
Middleton, R.: Cosmic ray produced 10Be and 26Al in Antarctic rocks:
exposure and erosion history, Earth Planet. Sc. Lett., 104, 440–454,
https://doi.org/10.1016/0012-821x(91)90221-3, 1991.
Ochs, M. and Ivy-Ochs, S.: The chemical behavior of Be, Al, Fe, Ca and Mg
during AMS target preparation from terrestrial silicates modeled with
chemical speciation calculations, Nucl. Instruments Methods Phys. Res. Sect. B., 123, 235–240,
https://doi.org/10.1016/s0168-583x(96)00680-5, 1997.
Schäfer, J. M., Ivy-Ochs, S., Wieler, R., Leya, I., Baur, H., Denton, G.
H., and Schlüchter, C.: Cosmogenic noble gas studies in the oldest
landscape on earth: surface exposure ages of the Dry Valleys, Antarctica,
Earth Planet. Sc. Lett., 167, 215–226,
https://doi.org/10.1016/s0012-821x(99)00029-1, 1999.
Schaefer, J. M., Faestermann, T., Herzog, G. F., Knie, K., Korschinek, G.,
Masarik, J., Meier, A., Poutivtsev, M., Rugel, G., Schlüchter, C.,
Serifiddin, F., and Winckler, G.: Terrestrial manganese-53 – A new monitor
of Earth surface processes, Earth Planet. Sc. Lett., 251, 334–345,
https://doi.org/10.1016/j.epsl.2006.09.016, 2006.
Schaefer, J. M., Denton, G. H., Kaplan, M., Putnam, A., Finkel, R. C.,
Barrell, D. J. A., Andersen, B. G., Schwartz, R., Mackintosh, A., Chinn, T.,
and Schlüchter, C.: High-Frequency Holocene Glacier Fluctuations in New
Zealand Differ from the Northern Signature, Science, 324, 622–625,
https://doi.org/10.1126/science.1169312, 2009.
Schaefer, J. M., Finkel, R. C., Balco, G., Alley, R. B., Caffee, M. W.,
Briner, J. P., Young, N. E., Gow, A. J., and Schwartz, R.: Greenland was
nearly ice-free for extended periods during the Pleistocene, Nature, 540,
252–255, https://doi.org/10.1038/nature20146, 2016a.
Schaefer, J. M., Winckler, G., Blard, P.-H., Balco, G., Shuster, D. L.,
Friedrich, R., Jull, A. J. T., Wieler, R., and Schluechter, C.: Performance
of CRONUS-P – A pyroxene reference material for helium isotope analysis,
Quat. Geochronol., 31, 237–239, https://doi.org/10.1016/j.quageo.2014.07.006,
2016b.
Schaefer, J. M., Codilean, A. T., Willenbring, J. K., Lu, Z.-T., Keisling,
B., Fülöp, R.-H., and Val, P.: Cosmogenic nuclide techniques, Nat.
Rev. Meth. Prim., 2, 18, https://doi.org/10.1038/s43586-022-00096-9,
2022.
Stone, J. O.: Air pressure and cosmogenic isotope production, J. Geophys. Res.
Sol.-Ea., 105, 23753–23759, https://doi.org/10.1029/2000jb900181, 2000.
Sugden, D. E., Marchant, D. R., Potter, N., Souchez, R. A., Denton, G. H.,
III, C. C. S., and Tison, J.-L.: Preservation of Miocene glacier ice in East
Antarctica, Nature, 376, 412–414, https://doi.org/10.1038/376412a0, 1995.
Summerfield, M. A., Stuart, F. M., Cockburn, H. A. P., Sugden, D. E.,
Denton, G. H., Dunai, T., and Marchant, D. R.: Long-term rates of denudation
in the Dry Valleys, Transantarctic Mountains, southern Victoria Land,
Antarctica based on in-situ-produced cosmogenic 21Ne, Geomorphology, 27,
113–129, https://doi.org/10.1016/s0169-555x(98)00093-2, 1999.
Young, N. E., Lesnek, A. J., Cuzzone, J. K., Briner, J. P., Badgeley, J. A., Balter-Kennedy, A., Graham, B. L., Cluett, A., Lamp, J. L., Schwartz, R., Tuna, T., Bard, E., Caffee, M. W., Zimmerman, S. R. H., and Schaefer, J. M.: In situ cosmogenic 10Be–14C–26Al measurements from recently deglaciated bedrock as a new tool to decipher changes in Greenland Ice Sheet size, Clim. Past, 17, 419–450, https://doi.org/10.5194/cp-17-419-2021, 2021.
Zavala, K., Leitch, A. M., and Fisher, G. W.: Silicic Segregations of the
Ferrar Dolerite Sills, Antarctica, J. Petrol., 52, 1927–1964,
https://doi.org/10.1093/petrology/egr035, 2011.
Zimmermann, L., Avice, G., Blard, P.-H., Marty, B., Füri, E., and
Burnard, P. G.: A new all-metal induction furnace for noble gas extraction,
Chem. Geol., 480, 86–92, https://doi.org/10.1016/j.chemgeo.2017.09.018, 2018.
Short summary
Cosmogenic nuclides like 10Be are rare isotopes created in rocks exposed at the Earth’s surface and can be used to understand glacier histories and landscape evolution. 10Be is usually measured in the mineral quartz. Here, we show that 10Be can be reliably measured in the mineral pyroxene. We use the measurements to determine exposure ages and understand landscape processes in rocks from Antarctica that do not have quartz, expanding the use of this method to new rock types.
Cosmogenic nuclides like 10Be are rare isotopes created in rocks exposed at the Earth’s...