{"id":"W2770943482","doi":"10.1017/s1473550417000441","title":"Chemical alteration and preservation of sedimentary/organic nitrogen isotope signatures in a 2.7 Ga seafloor volcanic sequence","year":2017,"lang":"en","type":"article","venue":"International Journal of Astrobiology","topic":"Geology and Paleoclimatology Research","field":"Earth and Planetary Sciences","cited_by":2,"is_retracted":false,"has_abstract":true,"ca_institutions":"Western University","funders":"Natural Sciences and Engineering Research Council of Canada; Mystic Seaport Museum; Williams College; Lehigh University; National Science Foundation","keywords":"Geology; Geochemistry; Seafloor spreading; Lithophile; Greenstone belt; Sedimentary rock; Igneous rock; Isotopic signature; Volcanic rock; Basalt; Biogeochemical cycle; Pillow lava; Volcano; Archean; Isotope; Paleontology; Chemistry","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":[0.0003906449,0.00006717338,0.0001665699,0.0001294614,0.00004650022,0.00002262813,0.000463998,0.0001022216,0.0005870959],"category_scores_gemma":[0.0002386531,0.00005492036,0.00003342748,0.00002486554,0.0002464657,0.000319773,0.00003756693,0.0002487365,0.000005757041],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.000004307318,"about_ca_system_score_gemma":0.00009447718,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0001998488,"about_ca_topic_score_gemma":0.001086033,"domain_scores_codex":[0.9992251,0.0001054605,0.0003007828,0.0001085035,0.0001263877,0.0001337382],"domain_scores_gemma":[0.9991633,0.0001805234,0.0003367095,0.00008588728,0.0001912855,0.00004229758],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0002795648,0.00001727646,0.9852648,0.000004185934,0.00006132534,0.00004066692,0.0000771022,0.000250845,0.0133158,0.00008950228,0.00003588935,0.0005630114],"study_design_scores_gemma":[0.0009823936,0.0002424846,0.9861242,0.0000364216,0.0000108832,0.0003630267,0.00005145178,0.001878863,0.007870976,0.002271561,0.0001023532,0.00006538608],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9971039,0.000238081,0.00007327916,0.002015474,0.0003109038,0.00005999615,0.00002220685,0.000001554593,0.0001746361],"genre_scores_gemma":[0.9990633,0.00007375995,0.0005985851,0.0001010657,0.0001035712,4.168772e-7,0.00003834427,0.000001251358,0.00001974445],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.005444822,"threshold_uncertainty_score":0.6428288,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02084772384140175,"score_gpt":0.2832110230877773,"score_spread":0.2623632992463755,"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."}}