{"id":"W2053767451","doi":"10.1038/nature07858","title":"Oceanic nickel depletion and a methanogen famine before the Great Oxidation Event","year":2009,"lang":"en","type":"article","venue":"Nature","topic":"Geochemistry and Elemental Analysis","field":"Earth and Planetary Sciences","cited_by":505,"is_retracted":false,"has_abstract":false,"ca_institutions":"Laurentian University; University of Alberta","funders":"","keywords":"Precambrian; Nickel; Methane; Ultramafic rock; Geology; Atmospheric methane; Geochemistry; Early Earth; Archean; Weathering; Environmental chemistry; Earth science; Chemistry; Oceanography; Greenhouse gas","routes":{"ca_aff":true,"ca_fund":false,"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":[0.0001344572,0.00006869357,0.00006262797,0.00001728958,0.0001278158,0.00002629887,0.0000860505,0.0001815131,0.0005633351],"category_scores_gemma":[0.00001889907,0.00004027837,0.00003683073,0.0001465045,0.00001700197,0.00007884634,0.000004270919,0.0003149703,0.00002193816],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000002592513,"about_ca_system_score_gemma":0.000004841427,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00006692687,"about_ca_topic_score_gemma":0.0005344755,"domain_scores_codex":[0.9995196,0.00002119781,0.00007503511,0.0001305659,0.0001457961,0.0001078144],"domain_scores_gemma":[0.9998038,0.00001268096,0.00003390177,0.00009447762,0.0000172159,0.00003790627],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.00007416429,0.00003891604,0.5460356,0.00003044346,0.0001085918,0.00001409838,0.0005128982,0.0002935134,0.007117422,0.0001993078,0.007010082,0.438565],"study_design_scores_gemma":[0.0001414495,0.00009112664,0.9857744,0.00000756735,0.00005862867,0.00002193925,0.0001450504,0.002419215,0.003263689,0.002193849,0.005806479,0.00007663325],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9935064,0.001571483,0.0000184979,0.003647625,0.00003797841,0.00006021042,0.00002007803,0.00001307667,0.001124659],"genre_scores_gemma":[0.9978866,0.00004364454,0.00008517742,0.000954686,0.00008165123,2.188777e-7,0.0003713135,6.450977e-7,0.0005760869],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.4397388,"threshold_uncertainty_score":0.6168125,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.004575409207034065,"score_gpt":0.2097286879151128,"score_spread":0.2051532787080787,"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."}}