georefid:2012-045491SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1016/j.margeo.2011.12.0062012-01-01publicationgeorefid:2012-045491doi:10.1016/j.margeo.2011.12.006Thomas, Alexander L.Oxford University, Department of Earth Sciences, Oxford, United KingdomauthorFujita, KazuhikoUniversity of the Ryukyus, JapanauthorIryu, YasufumiTohoku University, JapanauthorBard, EdouardAix-Marseille Unmiversite, FranceauthorCabioch, GuyInstitut de Recherche pour le Developpement, New CaledoniaauthorCamoin, GilbertUniversity of Arizona, United StatesauthorCole, Julia E.University of Bremen, GermanyauthorDeschamps, PierreKumamoto University, JapanauthorDurand, NicolasShizuoka University, JapanauthorHamelin, BrunoUniversity of South Florida, United StatesauthorHeindel, KatrinJapan Agency for Marine-Earth Science and Technology, JapanauthorHenderson, Gideon M.Akita University, JapanauthorMason, Andew J.Fukuoka University, JapanauthorMatsuda, HirokiUniversity of Edinburgh, United KingdomauthorMenabreaz, LucieJames Cook University of North Queensland, AustraliaauthorOmori, AkitoshiauthorQuinn, TerryauthorSakai, SaburoauthorSato, TokiyukiauthorSugihara, KaoruauthorTakahashi, YasunariauthorThouveny, NicolasauthorTudhope, Alexander W.authorWebster, JodyauthorWestphal, HildegardauthorYokoyama, YusukeauthorElsevier, Amsterdam, NetherlandspublisherdocumentHardcopyMarine Geology295-29886-94We present uranium-thorium chronology for a 102m core through a Pleistocene reef at Tahiti (French Polynesia) sampled during IODP Expedition 310 "Tahiti Sea Level". We employ total and partial dissolution procedures on the older coral samples to investigate the diagenetic overprint of the uranium-thorium system. Although alteration of the U-Th system cannot be robustly corrected, diagenetic trends in the U-Th data, combined with sea level and subsidence constraints for the growth of the corals enables the age of critical samples to be constrained to marine isotope stage 9. We use the ages of the corals, together with delta (super 18) O based sea-level histories, to provide maximum constraints on possible paleo water-depths. These depth constraints are then compared to independent depth estimates based on algal and foraminiferal assemblages, microbioerosion patterns, and sedimentary facies, confirming the accuracy of these paleo water-depth estimates. We also use the fact that corals could not have grown above sea level to place a maximum constraint on the subsidence rate of Tahiti to be 0.39mka (super -1) , with the most likely rate being close to the existing minimum estimate of 0.25mka (super -1) . Abstract Copyright (2012) Elsevier, B.V.completedQuaternary geologyGeochronologyabsolute agecarbonate rocksCenozoiccoresdatesEast PacificExpedition 310French PolynesiaIntegrated Ocean Drilling ProgramIODP Site M0005OceaniaPacific OceanpaleobathymetryPleistocenePolynesiaQuaternaryratesreconstructionreefssedimentary rocksSociety IslandsSouth PacificSoutheast PacificsubsidenceTahitiTahiti Sea Level ExpeditionTh/Uurn:org.iodp:exp:310urnlargerWorkCitationcampaignurn:org.iodp:exp:310:site:M0005urnlargerWorkCitationstudyurn:org.iodp:exp:310urnlargerWorkCitationcampaignEnglishgeoscientificInformation-149.3300-149.3300-17.4600-17.4600