{"id":"W2273926423","doi":"10.2138/am-2000-0703","title":"Cerium anomaly and Th/U fractionation in the 1.85 Ga Flin Flon Paleosol: Clues from REE- and U-rich accessory minerals and implications for paleoatmospheric reconstruction","year":2000,"lang":"en","type":"article","venue":"American Mineralogist","topic":"Geochemistry and Elemental Analysis","field":"Earth and Planetary Sciences","cited_by":60,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Saskatchewan","funders":"Natural Sciences and Engineering Research Council of Canada","keywords":"Paleosol; Geology; Geochemistry; Monazite; Metamorphism; Uraninite; Weathering; Diagenesis; Zircon; Isotopes of oxygen; Mineralogy; Paleontology; Uranium","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001317248,0.0001298974,0.0001810598,0.00002299621,0.0002334255,0.0001023655,0.00009023638,0.00003895831,0.0003152682],"category_scores_gemma":[0.00003185577,0.00009812704,0.00002729302,0.0002830065,0.0004150736,0.0002283781,0.000006203102,0.00007969403,0.000002826956],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000002870654,"about_ca_system_score_gemma":0.000009054462,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.02484568,"about_ca_topic_score_gemma":0.02530471,"domain_scores_codex":[0.9991388,0.00006720071,0.0002182585,0.000327162,0.00007596446,0.0001725686],"domain_scores_gemma":[0.9994763,0.000198351,0.0001097178,0.0001350649,0.00002424466,0.00005639376],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00003474471,0.00001299848,0.7982873,0.000006316743,0.0000161423,6.912503e-7,0.0001268204,0.0001136779,0.001072048,0.00000598595,0.0001799667,0.2001433],"study_design_scores_gemma":[0.000217943,0.00008572261,0.9933692,0.000005651813,0.00004097092,0.00003140643,0.0007400483,0.003263507,0.00004186728,0.0007528315,0.001314653,0.0001361574],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9937933,0.0007535979,0.0000498538,0.003565823,0.00002447166,0.000165693,0.0001889592,0.00001464485,0.001443673],"genre_scores_gemma":[0.9956692,0.0009434423,0.002165591,0.0003804028,0.0001078954,0.00001970933,0.0005036196,0.000002680905,0.0002074907],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.2000072,"threshold_uncertainty_score":0.9924809,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0129990294061747,"score_gpt":0.2351782762318237,"score_spread":0.222179246825649,"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."}}