Hallmaier Moritz moritz.hallmaier@iup.uni-heidelberg.de 0000-0001-9056-9396 GEOMAR - Helmholtz Centre for Ocean Research Kiel GEOMAR http://www.geomar.de https://ror.org/02h2x0161 Gutjahr Marcus mgutjahr@geomar.de https://www.geomar.de/mgutjahr/ 0000-0003-2556-2619 GEOMAR - Helmholtz Centre for Ocean Research Kiel GEOMAR http://www.geomar.de https://ror.org/02h2x0161 Hemming Sidney R sidney@ldeo.columbia.edu 0000-0001-8117-2303 Lippold Jörg joerg.lippold@geow.uni-heidelberg.de 0000-0003-1976-5065 Weber Michael E mike.weber@uni-bonn.de https://www.steinmann.uni-bonn.de/arbeitsgruppen/strukturgeologie/mitarbeiter/michael-e.-weber 0000-0003-2175-8980 Eisenhauer Anton aeisenhauer@geomar.de 0000-0002-6874-7050 GEOMAR - Helmholtz Centre for Ocean Research Kiel GEOMAR http://www.geomar.de https://ror.org/02h2x0161 2026 Radiogenic isotope compositions of Site U1537 in the Scotia Sea through the last 200,000 years dataset bundled publication https://doi.pangaea.de/10.1594/PANGAEA.993168 2026-04-08T13:50:39 We report radiogenic isotope records of IODP site U1537 in the Scotia Sea through the last 200,000 years. Detrital neodymium (ɛNd) varies between -3.8 and -8.6 (excluding two extremely radiogenic layers influenced by ash, which were excluded for the interpretation). Authigenic and detrital Pb isotope ratios show variations in line with detrital ɛNd. The data shows excursions towards older sediment and water mass sources during terminations, indicating a deglacial Weddell Sea Deep Water Pulse. All isotope measurements were conducted on a Multi-Collector Inductively Coupled Mass Spectrometer (MC-ICP-MS, Thermo Scientific Neptune Plus) at GEOMAR Helmholtz Center for Ocean Research. Smoothed records were fitted to the data with a Loess Bootstrap Model. For details on sample preparation and measurements consult the main manuscript. The radiogenic isotope datasets are complemented by the > 63 µm sediment weight fraction. For the last 170 ka the reported ages are based on the age model from Lu et al. 2022, older ages follow Weber et al. 2022. Hallmaier Moritz moritz.hallmaier@iup.uni-heidelberg.de 0000-0001-9056-9396 Gutjahr Marcus mgutjahr@geomar.de https://www.geomar.de/mgutjahr/ 0000-0003-2556-2619 Hemming Sidney R sidney@ldeo.columbia.edu 0000-0001-8117-2303 Lippold Jörg joerg.lippold@geow.uni-heidelberg.de 0000-0003-1976-5065 Weber Michael E mike.weber@uni-bonn.de https://www.steinmann.uni-bonn.de/arbeitsgruppen/strukturgeologie/mitarbeiter/michael-e.-weber 0000-0003-2175-8980 Eisenhauer Anton aeisenhauer@geomar.de 0000-0002-6874-7050 submitted Deglacial Weddell Sea Deep Water Pulse triggered Southern Ocean overturning Weber Michael E mike.weber@uni-bonn.de https://www.steinmann.uni-bonn.de/arbeitsgruppen/strukturgeologie/mitarbeiter/michael-e.-weber 0000-0003-2175-8980 Bailey Ian i.baileyexeter@gmail.com 0000-0001-5150-5437 Hemming Sidney R sidney@ldeo.columbia.edu 0000-0001-8117-2303 Martos Yasmina M yasmartos@gmail.com Reilly Brendan T breilly@ldeo.columbia.edu 0000-0003-3666-4338 Ronge Thomas A ronge@iodp.tamu.edu 0000-0003-2625-719X Brachfeld Stefanie A brachfelds@mail.montclair.edu http://www.montclair.edu/profilepages/view_profile.php?username=brachfelds 0000-0003-4612-2866 Williams Trevor J williams@iodp.tamu.edu Raymo Maureen E Belt Simon T S.Belt@plymouth.ac.uk 0000-0002-1570-2924 Smik Lukas l.smik@exeter.ac.uk 0000-0003-2280-7342 Vogel Hendrik hendrik.vogel@geo.unibe.ch 0000-0002-9902-8120 Peck Victoria L vlp@bas.ac.uk https://www.bas.ac.uk/profile/vlp/ Armbrecht Linda Cage Alix G 0000-0001-9992-9757 Cardillo Fabricio G Du Zhiheng Fauth Gerson 0000-0003-2594-1424 Fogwill Chris J c.j.fogwill@keele.ac.uk 0000-0002-6471-1106 García Marga M 0000-0003-2632-6132 Garnsworthy Marlo Glüder Anna Guitard Michelle Gutjahr Marcus mgutjahr@geomar.de https://www.geomar.de/mgutjahr/ 0000-0003-2556-2619 Hernández-Almeida Iván ivan.hernandez@unibe.ch 0000-0002-9329-8357 Hoem Frida f.s.hoem@uu.nl 0000-0002-8834-6799 Hwang Ji-Hwan Iizuka Matsumi Kato Yuji 0000-0001-9420-487X Kenlee Bridget O'Connell Suzanne B soconnell@wesleyan.edu Pérez Lara F 0000-0002-6229-4564 Seki Osamu seki@pop.lowtem.hokudai.ac.jp Stevens Lee Tauxe Lisa Tripathi Shubham 0000-0002-0676-4744 Warnock Jonathan jonathanpwarnock@gmail.com 0000-0002-0900-613X Zheng Xufeng 2022 Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years journal article Nature Communications 13 https://doi.org/10.1038/s41467-022-29642-5 2044 -40.905999999999985 -40.905999999999985 -59.11100000000001 -59.11100000000001 -40.905999999999985 -59.11100000000001 IODP Integrated Ocean Drilling Program / International Ocean Discovery Program https://www.iodp.org/ 4 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Number | n | Sample code/label | Sample label | CCSF (m) | Depth, composite | Depth comp | Neodymium-143/Neodymium-144 ratio | 143Nd/144Nd | 2SE | Neodymium-144/Neodymium-143 ratio, standard error | 144Nd/143Nd std e | ε-Neodymium | ε-Nd | ε-Neodymium, standard error | ε-Nd std e | Fraction, description | Fraction desc | Comment | Lead-206/Lead-204 ratio, authigenic | 206Pb/204Pb auth | Lead-206/Lead-204 ratio, authigenic, standard error | 206Pb/204Pb auth std e | Lead-207/Lead-204 ratio, authigenic | 207Pb/204Pb auth | Lead-207/Lead-204 ratio, authigenic, standard error | 207Pb/204Pb auth std e | Lead-208/Lead-204 ratio, authigenic | 208Pb/204Pb auth | Lead-208/Lead-204 ratio, authigenic, standard error | 208Pb/204Pb auth std e | Lead-208/Lead-206 ratio, authigenic | 208Pb/206Pb auth | Lead-208/Lead-206 ratio, authigenic, standard error | 208Pb/206Pb auth std e | Lead-207/Lead-206 ratio, authigenic | 207Pb/206Pb auth | Lead-207/Lead-206 ratio, authigenic, standard error | 207Pb/206Pb auth std e | Lead-208/Lead-207 ratio, authigenic | 208Pb/207Pb auth | Lead-208/Lead-207 ratio, authigenic, standard error | 208Pb/207Pb auth std e | Lead-206/Lead-204 ratio, detrital | 206Pb/204Pb detr | Lead-206/Lead-204 ratio, detrital, standard error | 206Pb/204Pb detr std e | Lead-207/Lead-204 ratio, detrital | 207Pb/204Pb detr | Lead-207/Lead-204 ratio, detrital, standard error | 207Pb/204Pb detr std e | Lead-208/Lead-204 ratio, detrital | 208Pb/204Pb detr | Lead-208/Lead-204 ratio, detrital, standard error | 208Pb/204Pb detr std e | Lead-208/Lead-206 ratio, detrital | 208Pb/206Pb detr | Lead-208/Lead-206 ratio, detrital, standard error | 208Pb/206Pb detr std e | Lead-207/Lead-206 ratio, detrital | 207Pb/206Pb detr | Lead-207/Lead-206 ratio, detrital, standard error | 207Pb/206Pb detr std e | Lead-208/Lead-207 ratio, detrital | 208Pb/207Pb detr | Lead-208/Lead-207 ratio, detrital, standard error | 208Pb/207Pb detr std e | Size fraction > 63 mm, boulder | >63 mm Antarctica detrital isotopes Lead isotopes Neodymium isotopes Scotia Sea Southern Ocean Weddell Sea geomar param1570 param17761 param189657 param192858 param2 param2270 param513875 param547592 param552580 param552581 param552582 param552583 param552584 param552585 param552586 param552587 param552588 param552589 param552590 param552591 param552592 param552593 param552594 param552595 param552596 param552597 param552598 param552599 param552600 param552601 param552602 param552603 param77489 param790 pi98321 author22378 author22469 author22741 author27925 author29266 author34013 author34016 author35 author35358 author35551 author38073 author38503 author40306 author40946 author40977 author44831 author45047 author49 author50514 author51089 author58395 author601 author65074 author68958 author70369 author70593 author71271 author84429 author86084 author86086 author86087 author86088 author86089 author86090 author86091 author86092 author86093 author86094 author86095 author86096 author98321 geocode1600 geocode1601 inst20147 journal16656 license21 project4048 ref111270 ref138714 term242 term264 term47158 term47208 term47873 term49964 term51599 term629 term68214