georefid:2004-040720SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1029/2002PA000804<gco:CharacterString>Paleoproductivity, nutrient burial, climate change and the carbon cycle in the western equatorial Atlantic across the Eocene/Oligocene boundary</gco:CharacterString>2003-01-01publicationgeorefid:2004-040720doi:10.1029/2002PA000804Nilsen, E. B.University of California at Santa Cruz, Ocean Sciences/Institute of Marine Sciences, Santa Cruz, CA, United StatesauthorAnderson, L. D.authorDelaney, M. L.authorAmerican Geophysical Union, Washington, DC, United StatespublisherdocumentDigitalPaleoceanography18 (3)Paleoproductivity, nutrient burial, and carbon cycling were investigated across the Eocene/Oligocene (E/O) boundary at Ocean Drilling Program Site 925 on the Ceara Rise in the western equatorial Atlantic. Downcore bulk sediment records of biogenic barium, total reactive phosphorus, biogenic silica, and calcium carbonate are interpreted to represent export production, net nutrient burial, biogenic opal production, and inorganic carbon burial, respectively. Biogenic silica production or preservation increased after the Eocene/Oligocene boundary to a higher baseline, although overall productivity and nutrient burial did not increase, based on barium and reactive phosphorus records. (mod. journ. abst.)completedStratigraphyAtlantic Oceanbiochemistrybiogenic processesC-13/C-12carboncarbon cycleCeara RiseCenozoiccoresEoceneEquatorial AtlanticForaminiferaframework silicatesgeochemical cyclegeochemistryhydrochemistryiceice volumeInvertebrataisotope ratiosisotopesLeg 154lower Oligocenemarine sedimentsmicrofossilsNorth AtlanticnutrientsO-18/O-16Ocean Drilling ProgramODP Site 925OligoceneopaloxygenpaleoclimatologyPaleogenepolar regionsProtistasea watersedimentssilica mineralssilicatesSouthern Oceanstable isotopesstratigraphic boundaryTertiaryupper EoceneWest Atlanticurn:org.iodp:exp:154urnlargerWorkCitationcampaignurn:org.iodp:exp:154:site:925urnlargerWorkCitationstudyurn:org.iodp:exp:154urnlargerWorkCitationcampaignEnglishgeoscientificInformation-180.0000180.0000-90.00007.0000Ceara RiseSouthern Oceanapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www.agu.org/journals/pa/pa0303/2002PA000804/2002PA000804.pdfdownload