{"id":"W2041762395","doi":"10.1038/nature06811","title":"Tracing the stepwise oxygenation of the Proterozoic ocean","year":2008,"lang":"en","type":"article","venue":"Nature","topic":"Geochemistry and Elemental Analysis","field":"Earth and Planetary Sciences","cited_by":1080,"is_retracted":false,"has_abstract":false,"ca_institutions":"Université du Québec à Montréal; University of Manitoba","funders":"Natural Environment Research Council; Natural Sciences and Engineering Research Council of Canada; NASA Astrobiology Institute; Danmarks Grundforskningsfond; National Science Foundation","keywords":"Authigenic; Geology; Proterozoic; Weathering; Sedimentary rock; Precambrian; Biogeochemical cycle; Banded iron formation; Geologic record; Paleontology; Earth science; myr; Geochemistry; Chemistry; Environmental chemistry","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.006586412418277817,"score_gpt":0.1837467240030939,"score_spread":0.1771603115848161,"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."}}