{"id":"W4416718940","doi":"10.1038/s43247-025-02931-9","title":"Large non-mass-dependent iron isotope fractionation in an oxic-anoxic transition zone of lake sediments","year":2025,"lang":"en","type":"article","venue":"Communications Earth & Environment","topic":"Geomagnetism and Paleomagnetism Studies","field":"Biochemistry, Genetics and Molecular Biology","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"Trent University; McGill University","funders":"National Natural Science Foundation of China; China University of Geosciences; China University of Geosciences, Beijing; Trent University","keywords":"Fractionation; Magnetotactic bacteria; Sediment; Biomineralization; Manganese; Sulfate; Isotopic signature; Abundance (ecology); Seawater","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0002166705,0.0001265108,0.0001366815,0.00009149796,0.0001479691,0.00000970683,0.0003089123,0.0001065045,0.00009693524],"category_scores_gemma":[0.000009063717,0.0001444695,0.00004807695,0.00008551987,0.0001076358,0.0000157485,0.0001609514,0.0001112075,0.00001937199],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0000146237,"about_ca_system_score_gemma":0.00002241645,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00002364724,"about_ca_topic_score_gemma":0.001345146,"domain_scores_codex":[0.9990242,0.0001398861,0.0002958415,0.0002453926,0.0001317896,0.0001628985],"domain_scores_gemma":[0.9987952,0.00001889915,0.00008805155,0.001043304,0.00002047428,0.00003409648],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"observational","study_design_scores_codex":[0.0001002146,0.001999452,0.04595079,0.00006312384,0.00008165247,0.000001577967,0.001044271,0.00401256,0.9356338,0.0003558626,0.000294186,0.01046254],"study_design_scores_gemma":[0.00311156,0.0008688549,0.8482486,0.00008152125,0.00009601493,0.000002431656,0.001242067,0.002241733,0.05875155,0.0002939653,0.08462343,0.0004382651],"study_design_candidate":"bench_or_experimental","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.976692,0.002252497,0.01673805,0.0009356623,0.00007278077,0.0005318174,0.0001130648,0.000009342737,0.002654799],"genre_scores_gemma":[0.9914929,0.004162311,0.002432911,0.0001622456,0.00001543905,0.0001171779,0.0008133519,0.000009114732,0.0007945471],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.8768822,"threshold_uncertainty_score":0.5891293,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.008408184697180849,"score_gpt":0.2437449460252128,"score_spread":0.235336761328032,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}