georefid:2004-043603SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1126/science.1092296<gco:CharacterString>Oxygen isotope constraints on the sulfur cycle over the past 10 million years</gco:CharacterString>2004-01-01publicationgeorefid:2004-043603doi:10.1126/science.1092296Turchyn, Alexandra V.Harvard University, Department of Earth and Planetary Sciences, Cambridge, MA, United StatesauthorSchrag, Daniel P.authorAmerican Association for the Advancement of Science, Washington, DC, United StatespublisherdocumentDigitalScience303 (5666)2004-2007Oxygen isotopes in marine sulfate (delta (super 18) O (sub SO4) ) measured in marine barite show variability over the past 10 million years, including a 5 per mil decrease during the Plio-Pleistocene, with near-constant values during the Miocene that are slightly enriched over the modern ocean. A numerical model suggests that sea level fluctuations during Plio-Pleistocene glacial cycles affected the sulfur cycle by reducing the area of continental shelves and increasing the oxidative weathering of pyrite. The data also require that sulfate concentrations were 10 to 20% lower in the late Miocene than today.completedStratigraphyIsotope geochemistrybaritebenthic taxabiochemistryCenozoicclimate changeconcentrationcyclesDeep Sea Drilling ProjectForaminiferageochemical cyclegeochemistryglacial environmentglaciationglaciomarine environmentInvertebrataisotope ratiosisotopesmarine environmentmicrofossilsNeogenenumerical modelsO-18/O-16organic compoundsoxygenPacific Oceanpaleo-oceanographypaleoclimatologypaleoenvironmentProtistaQuaternarystable isotopessulfatessulfurTertiaryEnglishgeoscientificInformationapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www.sciencemag.org/content/303/5666/2004.full.pdfdownload