PANGAEA_993221 Quaternary trace metals data from ODP Site 198-1208 Novak, Joseph B; Abell, Jordan; Kinsley, Christopher Quaternary trace metals data from ODP Site 198-1208 2026-04-08 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993221 Investigator Joseph B Novak jobnovak@ucsc.edu Earth Science AGE Uranium, authigenic Uranium, authigenic, standard deviation geoscientificInformation 198-1208 Carbon cycle carbon isotope gradients Composite Core Leg198 trace metals See description in dataset comment Joides Resolution 2001-09-14 2001-09-17 Complete 36.127166666667 36.127166666667 158.20158333333 158.20158333333 unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 320 data points text/tab-separated-values Novak, Joseph B; Abell, Jordan; Kinsley, Christopher (2026): Quaternary trace metals data from ODP Site 198-1208 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983610 Abell, Jordan T; Winckler, Gisela (2023): Long‐Term Variability in Pliocene North Pacific Ocean Export Production and Its Implications for Ocean Circulation in a Warmer World. AGU Advances, 4(4), e2022AV000853, https://doi.org/10.1029/2022AV000853 Abell, Jordan T; Winckler, Gisela; Anderson, Robert F; Herbert, Timothy D (2021): Poleward and weakened westerlies during Pliocene warmth. Nature, 589(7840), 70-75, https://doi.org/10.1038/s41586-020-03062-1 Henderson, G M (2003): The U-series Toolbox for Paleoceanography. Reviews in Mineralogy & Geochemistry, 52(1), 493-531, https://doi.org/10.2113/0520493 Kinsley, C W; Bradtmiller, Louisa I; Zhang, Yan; McGee, David (2022): Ocean-atmosphere changes in the midlatitude North Pacific over the last 330 ka: Dust, biogenic sediment and authigenic uranium accumulation at Shatsky Rise — Dataset [dataset]. Zenodo, https://doi.org/10.5281/ZENODO.6791725 McGee, David; Winckler, Gisela; Borunda, Alejandra; Serno, Sascha; Anderson, Robert F; Recasens, Cristina; Bory, Aloys J-M; Gaiero, Diego M; Jaccard, Samuel L; Kaplan, Michael R; McManus, Jerry F; Revel, Marie; Sun, Youbin (2016): Tracking eolian dust with helium and thorium: Impacts of grain size and provenance. Geochimica et Cosmochimica Acta, 175, 47-67, https://doi.org/10.1016/j.gca.2015.11.023 Taylor, Stuart Ross; McLennan, Scott M (1995): The geochemical evolution of the continental crust. Reviews of Geophysics, 33(2), 241, https://doi.org/10.1029/95RG00262

This data set contains authigenic uranium concentrations from ODP Site 198-1208 that span ~2 to 330 thousand years ago. These data give insight into glacial-interglacial changes in sedimentary redox chemistry at the drill site. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993221"! ** Methods: Sample depths, ages, and Th concentrations have been previously published for the both the late Quaternary (Abell et al., 2023; Kinsley et al., 2022) and Pliocene-early Pleistocene (Abell et al., 2021). Because the late Quaternary data are based on measurements of distinct isotopes of U/Th (238U and 232Th) and not bulk concentrations of these elements, the lithogenic correction for these samples is made using activity ratios. Here we assume an activity ratio of 0.5. While the (U/Th)lith activity ratio for Pacific sediments is typically assumed to be higher at 0.7 (Henderson & Anderson, 2003), use of this value would produce negative Uauth concentrations. A ratio of 0.5 does not lead to negative Uauth concentrations, and is consistent with estimates for other ocean basin (Henderson & Anderson, 2003). In order to make consistent comparison within a site across time, we convert this (U/Th)lith activity ratio to a concentration ratio (0.16125) for calculating Uauth concentrations within the 2.5–4.5 Ma window. This value is only slightly lower than if we adopted the U concentration of upper continental crust (2.8 ppm; Taylor & McLennan, 1995) and the Th concentration of fine-grained dust (14 ppm; McGee et al., 2016). We note that any value higher than this would also produce negative Uauth concentrations in this interval, lending confidence in our selected lithogenic (U/Th) ratio.

http://en.wikipedia.org/wiki/Kyr AGE https://doi.org/10.1016/j.gca.2015.11.023 Tracking eolian dust with helium and thorium: Impacts of grain size and provenance https://doi.org/10.1029/2022AV000853 Long‐Term Variability in Pliocene North Pacific Ocean Export Production and Its Implications for Ocean Circulation in a Warmer World https://doi.org/10.1029/95RG00262 The geochemical evolution of the continental crust https://doi.org/10.1038/s41586-020-03062-1 Poleward and weakened westerlies during Pliocene warmth https://doi.org/10.2113/0520493 The U-series Toolbox for Paleoceanography https://doi.org/10.2973/odp.proc.ir.198.2002 Leg198 https://doi.org/10.5281/ZENODO.6791725 Ocean-atmosphere changes in the midlatitude North Pacific over the last 330 ka: Dust, biogenic sediment and authigenic uranium accumulation at Shatsky Rise — Dataset https://doi.pangaea.de/10.1594/PANGAEA.983610 Quaternary trace metals data from ODP Site 198-1208 https://www-odp.tamu.edu:443/resolutn.html Joides Resolution PANGAEA_983612 DIF 9.4 2026-04-08 2026-04-08