{
  "abstract": "The Zn isotope composition of marine carbonates provides a window into major reorganizations of the Earth surface system. Here, we present 185 new δ⁶⁶Zn measurements from 176 carbonate samples spanning the Early Archean (3.48 Ga) to the Paleogene, integrated with 220 published analyses of carbonates, banded iron formations (BIF), sulfides, organic-rich sediments, and Fe–Mn crusts. The composite record reveals four first-order transitions: (1) a Late Archean decline in carbonate δ⁶⁶Zn culminating near the Great Oxidation Event (GOE); (2) a reversal of the carbonate–BIF Zn isotope offset across the GOE; (3) relative Zn isotope stability during the mid-Proterozoic; and (4) a progressive rise in δ⁶⁶Zn and amplification of isotopic variability from the Neoproterozoic onward.We argue that these secular trends reflect shifts in Zn partitioning among Fe-rich phases, carbonates, phosphates, and organic matter in response to evolving ocean chemistry and ecosystem structure, including the rise of eukaryotic algae. A single-reservoir Zn isotope mass-balance model, including sedimentary removal and exchange with diagenetic and hydrothermal fluids, is used to evaluate how changes in these fluxes and their isotope fractionations are expressed in the δ⁶⁶Zn values of sedimentary rocks. Because the marine Zn cycle has a short residence time relative to the geological timescales considered here, the model supports interpretation of carbonateδ⁶⁶Zn as a tracer of changes in Zn sources, sinks, and their coupling to continental weathering, phosphorus cycling, redox transitions, and biological innovation through Earth history.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Francis Albarède"
    },
    {
      "name": "Janne Blichert-Toft"
    },
    {
      "name": "Kurt O Konhauser"
    },
    {
      "name": "Andrew H Knoll"
    },
    {
      "name": "Marine Pinto"
    },
    {
      "name": "Aline Lamboux"
    },
    {
      "name": "Harilaos Tsikos"
    },
    {
      "name": "Gilles Dromart"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/cqxaj2djbszc3.bib",
  "cited_by": 0,
  "doi": "10.1016/j.gca.2026.09.021",
  "fulltext_url": null,
  "id": "cqxaj2djbszc3",
  "issns": [
    "0016-7037",
    "1872-9533"
  ],
  "landing_url": "https://hal.science/hal-05774790v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.sdu"
    ],
    [
      "hal",
      "1.sdu.stu"
    ],
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      "hal",
      "2.sdu.stu.gc"
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      "hal",
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      "openalex",
      "1911|Paleontology and Stratigraphy of Fossils"
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  "openalex": "W7214302274",
  "pdf_url": "https://hal.science/hal-05774790/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-25",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/cqxaj2djbszc3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:46Z",
      "native_id": "hal-05774790",
      "source": "hal",
      "url": "https://hal.science/hal-05774790v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.gc",
      "subfield": "geology-geochemistry"
    },
    {
      "field": "earth",
      "origin": "hal:2.sdu.stu.oc",
      "subfield": "oceanography"
    }
  ],
  "title": "Secular evolution of marine carbonate δ⁶⁶Zn and its implications for nutrient cycling through time",
  "title_text": "Secular evolution of marine carbonate δ⁶⁶Zn and its implications for nutrient cycling through time",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:46Z",
  "url": "https://research.draconitic.com/paper/cqxaj2djbszc3",
  "venue": "Geochimica et Cosmochimica Acta",
  "versions": []
}