{"data":{"id":"10.1594/pangaea.706068","type":"dois","attributes":{"doi":"10.1594/pangaea.706068","prefix":"10.1594","suffix":"pangaea.706068","identifiers":[],"alternateIdentifiers":[],"creators":[{"name":"Ando, Atsushi","givenName":"Atsushi","familyName":"Ando","affiliation":[],"nameIdentifiers":[]},{"name":"Kaiho, Kunio","givenName":"Kunio","familyName":"Kaiho","nameIdentifiers":[{"schemeUri":"https://orcid.org","nameIdentifier":"https://orcid.org/0000-0002-9212-1218","nameIdentifierScheme":"ORCID"}],"affiliation":[]},{"name":"Kawahata, Hodaka","givenName":"Hodaka","familyName":"Kawahata","nameIdentifiers":[{"schemeUri":"https://orcid.org","nameIdentifier":"https://orcid.org/0000-0003-4236-7356","nameIdentifierScheme":"ORCID"}],"affiliation":[]},{"name":"Kakegawa, Takeshi","givenName":"Takeshi","familyName":"Kakegawa","affiliation":[],"nameIdentifiers":[]}],"titles":[{"title":"Stable carbon and oxygen isotope ratios of bulk sediment from DSDP Hole 62-463 (Appendix A)"}],"publisher":"PANGAEA","container":{},"publicationYear":2008,"subjects":[{"subject":"DEPTH, sediment/rock","subjectScheme":"Parameter"},{"subject":"Sample code/label","subjectScheme":"Parameter"},{"subject":"Lithology/composition/facies","subjectScheme":"Parameter"},{"subject":"δ18O, carbonate","subjectScheme":"Parameter"},{"subject":"δ13C, carbonate","subjectScheme":"Parameter"},{"subject":"Sample comment","subjectScheme":"Parameter"},{"subject":"Drilling/drill rig","subjectScheme":"Method"},{"subject":"DSDP/ODP/IODP sample designation","subjectScheme":"Method"},{"subject":"Isotope ratio mass spectrometry","subjectScheme":"Method"},{"subject":"Leg62","subjectScheme":"Campaign"},{"subject":"Glomar Challenger","subjectScheme":"Basis"},{"subject":"Deep Sea Drilling Project (DSDP)","subjectScheme":"Project"}],"contributors":[],"dates":[{"date":"1978-08-02T00:00:00","dateType":"Collected"},{"date":"2008","dateType":"Issued"}],"language":"en","types":{"ris":"DATA","bibtex":"misc","citeproc":"dataset","schemaOrg":"Dataset","resourceType":"Supplementary Dataset","resourceTypeGeneral":"Dataset"},"relatedIdentifiers":[{"relationType":"IsSupplementTo","relatedIdentifier":"10.1016/j.palaeo.2007.12.007","relatedIdentifierType":"DOI"}],"relatedItems":[],"sizes":["260 data points"],"formats":["text/tab-separated-values"],"version":null,"rightsList":[{"rights":"Creative Commons Attribution 3.0 Unported","rightsUri":"https://creativecommons.org/licenses/by/3.0/legalcode","schemeUri":"https://spdx.org/licenses/","rightsIdentifier":"cc-by-3.0","rightsIdentifierScheme":"SPDX"}],"descriptions":[{"description":"In order to elucidate early Aptian marine paleotemperature evolution across the period of enhanced organic carbon (Corg)-burial [Oceanic Anoxic Event (OAE) 1a], stable isotope analyses were performed on pelagic limestones at Deep Sea Drilling Project Site 463, central Pacific Ocean. The delta18O data exhibit a distinct anomaly by ~-2 per mil spanning the OAE 1a interval (i.e., a ~6 m-thick, phytoplanktonic Corg-rich unit constrained by magneto-, bio- and delta13C stratigraphy). Elucidation of paleotemperature significance of the delta18O shift is made by taking account of recent Sr/Ca evidence at the same section, which revealed that geochemical signals in carbonate-poor lithologies are relatively unaltered against burial diagenesis. By discriminating delta18O values from carbonate-poor samples (CaCO3 contents=5-30 wt.%), it appears that an abrupt rise in seasurface temperatures (SSTs) by 8 °C (=-1.7 per mil shift in delta18O) occurred immediately before OAE 1a, whereas a cooling mode likely prevailed during the peak Corg-burial. In terms of its stratigraphic relationship as to the Corg-rich interval and to a pronounced negative delta13C excursion, as well as its timescale, the observed SST rise resembles those associated with the Paleocene-Eocene thermal maximum and, more strikingly, Jurassic Toarcian OAE. This observation is consistent with the hypothesis that these paleoenvironmental events were driven by a common causal mechanism, which was likely initiated by the greenhouse effect via massive release of CH4 or CO2 from the isotopically-light carbon reservoir and terminated by a negative productivity feedback.","descriptionType":"Abstract"},{"description":"Supplement to: Ando, Atsushi; Kaiho, Kunio; Kawahata, Hodaka; Kakegawa, Takeshi (2008): Timing and magnitude of early Aptian extreme warming: Unraveling primary d18O variation in indurated pelagic carbonates at Deep Sea Drilling Project Site 463, central Pacific Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(3-4), 463-476","descriptionType":"Other"}],"geoLocations":[{"geoLocationPoint":{"pointLatitude":"21.3502","pointLongitude":"174.6678"}},{"geoLocationPlace":"North 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