georefid:1996-069285SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=1996-069285<gco:CharacterString>Iridium concentration as an estimation of instantaneous sediment accumulation rates</gco:CharacterString>1996-01-01publicationgeorefid:1996-069285Bruns, PeterUniversity of Colorado, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United StatesauthorDullo, Wolf-ChristianUniversity of Kiel, Federal Republic of GermanyauthorHay, William W.NCAR, United StatesauthorWold, Christopher NedMax-Planck-Institut fuer Kernphysik, Federal Republic of GermanyauthorPernicka, ErnstauthorSociety of Economic Paleontologists and Mineralogists, Tulsa, OK, United StatespublisherdocumentHardcopyJournal of Sedimentary Research66 (3)608-612Ir concentrations and mass accumulation rates from nine deep-sea cores, one from the Atlantic Ocean and eight from the Pacific Ocean, were compiled to evaluate a new technique for determining mass accumulation rates. The technique is based on the large difference of the high Ir abundance in extraterrestrial matter versus the low Ir contents in terrestrial material. Assuming a constant flux of cosmic matter, this difference leads to high Ir concentrations in slowly accumulating sediments, versus low Ir concentration in rapidly accumulating sediments. The method is independent of stratigraphic control, and does not require knowledge of age of the deposit. We note that Ir concentrations in some slowly accumulating sediments are of the same order of magnitude as some of those reported for the Cretaceous-Tertiary boundary event.completedGeochemistry of rocks, soils, and sedimentsSedimentary petrologyArctic OceanCenozoicDeep Sea Drilling ProjectDSDP Site 597East PacificEast Pacific RisegeochemistryIPODiridiumLeg 104Leg 92metalsNeogeneNorwegian SeaOcean Drilling ProgramODP Site 642Pacific Oceanplatinum groupsedimentationsedimentation ratessedimentsTertiaryVoring Plateauurn:org.iodp:exp:104urnlargerWorkCitationcampaignurn:org.iodp:exp:92urnlargerWorkCitationcampaignurn:org.iodp:exp:92:site:597urnlargerWorkCitationstudyurn:org.iodp:exp:92urnlargerWorkCitationcampaignurn:org.iodp:exp:104:site:642urnlargerWorkCitationstudyurn:org.iodp:exp:104urnlargerWorkCitationcampaignEnglishgeoscientificInformation-129.46142.5548-18.482367.1330