{"id":"W3114590169","doi":"10.4324/9781315660639-21","title":"Are Ore Grades Declining? The Canadian Experience, 1939-89","year":2015,"lang":"en","type":"book-chapter","venue":"","topic":"Geochemistry and Geologic Mapping","field":"Computer Science","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"","funders":"","keywords":"Iron ore; Geography; Archaeology","routes":{"ca_aff":false,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":true},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.002656363,0.0003349389,0.0006281697,0.002073396,0.02860855,0.005656252,0.002341245,0.002197746,0.009876805],"category_scores_gemma":[0.007771317,0.0005641171,0.0005148982,0.009597819,0.005942562,0.002211987,0.002439283,0.003964928,0.0008276138],"about_ca_system_candidate":true,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.1557927,"about_ca_system_score_gemma":0.2452955,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.9991714,"about_ca_topic_score_gemma":0.9996723,"domain_scores_codex":[0.9961927,0.0002017166,0.0001024718,0.0002838186,0.001449611,0.001769647],"domain_scores_gemma":[0.9941288,0.0003699098,0.0003347408,0.0001656857,0.003422273,0.001578526],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"not_applicable","study_design_gemma":"observational","study_design_scores_codex":[0.0004098841,0.0001968765,0.160833,0.0007105184,0.0001341404,0.003523935,0.1950087,0.0005066217,0.001051835,0.08834718,0.3839163,0.165361],"study_design_scores_gemma":[0.00002711959,0.00004471972,0.2156649,0.0004757281,0.00004741016,0.0005940919,0.1006111,0.000184498,0.0003426055,0.001418833,0.6804471,0.0001420072],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.493486,0.02486807,0.0004503736,0.1915486,0.00128083,0.0001326092,0.008379073,0.0001129794,0.2797415],"genre_scores_gemma":[0.8542862,0.02256558,0.0005548038,0.0194982,0.0001387652,0.00004077108,0.001677061,0.0001265231,0.1011121],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1557927,"threshold_uncertainty_score":0.9791608,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.07938334769186979,"score_gpt":0.2625333430500084,"score_spread":0.1831499953581386,"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."}}