8f999423-ff40-4181-bdf3-964a7e145772 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2025-04-10 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Geochronological data from the Hudson Mountains, Antarctica 2025-04-10 creation 2025-04-10 revision 2025-04-10 publication 2025-04-10 released 1.0 https://doi.org/10.5285/8f999423-ff40-4181-bdf3-964a7e145772 doi GB/NERC/BAS/PDC/02044 https://data.bas.ac.uk/ NE/S006710/1 award Please cite this item as: Riley, T., Carter, A., & Johnson, J. S. (2025). Geochronological data from the Hudson Mountains, Antarctica (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/8f999423-ff40-4181-bdf3-964a7e145772 Geological fieldwork was carried out in the Hudson Mountains during the 2005/6 and 2019/20 Antarctic summers to help understand the glacial history of the Pine Island Glacier region of West Antarctica. To accurately determine the crystallisation age of a suite of granitoid glacial erratics, we conducted a detailed analysis of zircon U-Pb geochronology. The dataset here provides U-Pb zircon geochronology data for 10 rock samples, collected from the Hudson Mountains. The data were collected in November 2024 at University College London. The analyses were conducted by Andrew Carter (University College London). This work was funded by NERC grant (NE/S006710/1) to Joanne Johnson. No credit. completed Riley, Teal British Antarctic Survey Researcher author Carter, Andrew University College London Researcher author Johnson, Joanne British Antarctic Survey Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Land Surface > Geomorphology > Glacial Landforms/Processes theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Geochemistry Geochronology Provenance Zircon theme Evans Knoll, Hudson Mountains Antarctica Winkie Nunatak, Hudson Mountains Antarctica Shepherd Dome, Hudson Mountains Antarctica Inman Nunatak, Hudson Mountains Antarctica Meyers Nunatak, Hudson Mountains Antarctica St Manthe, Hudson Mountains Antarctica Wold Nunatak, Hudson Mountains Antarctica Siren Rock, Hudson Mountains Antarctica Slusher Nunatak, Hudson Mountains Antarctica place Land cover theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions and supplied under Open Government Licence v.3 (). otherRestrictions No restrictions apply. url url crossReference textTable eng utf8 geoscientificInformation -99.7777 -99.7777 -74.8619 -74.8619 2024-11-01 2024-11-30 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor bytes 1 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=8f999423-ff40-4181-bdf3-964a7e145772 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Geological fieldwork was carried out in the Hudson Mountains during the 2005/6 and 2019/20 Antarctic summers. The crystallization age of 10 samples from these expeditions were analysed using zircon U-Pb geochronology. Zircon U-Pb geochronology used laser ablation inductively coupled mass spectrometry (LA-ICP-MS) facilities (Agilent 7700 coupled to a New Wave Research 193 nm excimer laser) at the London Geochronology Centre based in University College London. Heavy minerals were separated from bulk sediment samples using standard density liquid and magnetic separation procedures. Zircon-enriched extracts were mounted in hard epoxy resin on glass slides and polished for analysis.Typical laser spot sizes of 25 µm were used with a 7-10 Hz repetition rate and a fluence of 2.5 J/cm2. Background measurement before ablation lasted 15 seconds and laser ablation dwell time was 25 seconds. The external zircon standard was Plesovice, which has a TIMS reference age 337.13 ± 0.37 Ma (Sláma et al., 2008). Standard errors on isotope ratios and ages include the standard deviation of 206Pb/238U ages of the Plesovice standard zircon.Time-resolved signals that record isotopic ratios with depth in each crystal were processed using GLITTER 4.5, data reduction software, developed by the ARC National Key Centre for Geochemical Evolution and Metallogeny of Continents (GEMOC) at Macquarie University and CSIRO Exploration and Mining. Processing enabled filtering to remove spurious signals owing to overgrowth boundaries, weathering, inclusions, or fractures. Data collection: Data was processed using software by Ludwig (2012) and Vermeesch (2018) Data quality: U-Pb ages were calculated using the 206Pb/238U ratios for samples dated as <1.1 Ga, and the 207Pb/206Pb ratios was used for older grains. Discordance was determined using (207Pb/235U - 206Pb/238U) / 206Pb/238U) and similar for 207Pb/206Pb ages. asNeeded completed