georefid:2013-034383SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1029/2009PA001904<gco:CharacterString>South Pacific intermediate water oxygen depletion at the onset of the Paleocene-Eocene Thermal Maximum as depicted in New Zealand margin sections</gco:CharacterString>2010-01-01publicationgeorefid:2013-034383doi:10.1029/2009PA001904Nicolo, Micah J.Shell International Exploration and Production, Houston, TX, United StatesauthorDickens, Gerald R.Rice University, United StatesauthorHollis, Christopher J.Institute of Geological and Nuclear Sciences, New ZealandauthorAmerican Geophysical Union, Washington, DC, United StatespublisherdocumentHardcopyPaleoceanography25 (4)Extreme global warming and massive input of (super 13) C-depleted carbon into the exogenic carbon cycle characterize the Paleocene-Eocene thermal maximum (PETM) circa 55.5 Ma. Previous work indicates that dissolved O (sub 2) concentrations dropped in some regions of the ocean during this event, but spatial, temporal, and causal relationships between warming, carbon input, and O (sub 2) deficiency remain elusive. We present lithologic, carbon isotopic, and trace fossil results from outcrops in New Zealand that clarify this issue. Sections exposed at Mead and Dee Streams in eastern Marlborough, South Island, contain expanded sedimentary intervals that were deposited before, during, and after the PETM on an upper continental slope. The PETM in these intervals is characterized by enhanced siliciclastic deposition, a hallmark negative carbon isotope excursion, and a loss of bioturbation. Importantly, however, the latter only occurs during the prominent drop in delta (super 13) C and not during its recovery. Our results suggest that South Pacific intermediate waters became hypoxic coincident to carbon injection at the start of the PETM. While higher sea surface temperatures throughout the PETM would have decreased the dissolved oxygen content of sinking surface waters, we argue here that oxygen depletion was driven by some combination of elevated temperature, water column stratification, and intermediate water methane oxidation.completedStratigraphyalkaline earth metalsAmuri Limestone FormationAustralasiabiogenic structuresbiostratigraphybioturbationC-13/C-12calciumcalcium carbonatecarboncarbonate rocksCenozoicchemostratigraphydepositional environmentEoceneForaminiferaInvertebrataisotope ratiosisotopesLeg 113Leg 198limestonelithostratigraphymagnesiummarine environmentMarlborough New ZealandMaud RisemetalsMg/CamicrofossilsNew ZealandNorth PacificNorthwest PacificO-18/O-16Ocean Drilling ProgramODP Site 1209ODP Site 690oxygenPacific Oceanpaleo-oceanographyPaleocenePaleocene-Eocene Thermal MaximumpaleoclimatologypaleoenvironmentPaleogeneProtistasedimentary rockssedimentary structuresShatsky Riseslope environmentSouth IslandSouth PacificSouthern Oceanstable isotopesTertiaryWeddell SeaWest Pacificurn:org.iodp:exp:113urnlargerWorkCitationcampaignurn:org.iodp:exp:198urnlargerWorkCitationcampaignurn:org.iodp:exp:198:site:1209urnlargerWorkCitationstudyurn:org.iodp:exp:198urnlargerWorkCitationcampaignurn:org.iodp:exp:113:site:690urnlargerWorkCitationstudyurn:org.iodp:exp:113urnlargerWorkCitationcampaignEnglishgeoscientificInformation1.1218158.3100-65.093832.4000