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The Paleocene-Eocene Thermal Maximum at DSDP Site 277, Campbell Plateau, southern Pacific Ocean

Hollis, C J; Hines, B.R.; Littler, K.; Villasante-Marcos, V.; Kulhanek, D.K.; Strong, C.P; Zachos, James; Eggins, Stephen; Northcote, L.; Phillips, A.

Description

Re-examination of sediment cores from Deep Sea Drilling Project (DSDP) Site 277 on the western margin of the Campbell Plateau (paleolatitude of ∼65°S) has identified an intact Paleocene-Eocene (P-E) boundary overlain by a 34 cm thick record of the Paleocene-Eocene Thermal Maximum (PETM) within nannofossil chalk. The upper part of the PETM is truncated, either due to drilling disturbance or a sedimentary hiatus. An intact record of the onset of the PETM is indicated by a gradual decrease in δ13C...[Show more]

dc.contributor.authorHollis, C J
dc.contributor.authorHines, B.R.
dc.contributor.authorLittler, K.
dc.contributor.authorVillasante-Marcos, V.
dc.contributor.authorKulhanek, D.K.
dc.contributor.authorStrong, C.P
dc.contributor.authorZachos, James
dc.contributor.authorEggins, Stephen
dc.contributor.authorNorthcote, L.
dc.contributor.authorPhillips, A.
dc.date.accessioned2016-06-14T23:20:07Z
dc.identifier.issn1814-9324
dc.identifier.urihttp://hdl.handle.net/1885/103208
dc.description.abstractRe-examination of sediment cores from Deep Sea Drilling Project (DSDP) Site 277 on the western margin of the Campbell Plateau (paleolatitude of ∼65°S) has identified an intact Paleocene-Eocene (P-E) boundary overlain by a 34 cm thick record of the Paleocene-Eocene Thermal Maximum (PETM) within nannofossil chalk. The upper part of the PETM is truncated, either due to drilling disturbance or a sedimentary hiatus. An intact record of the onset of the PETM is indicated by a gradual decrease in δ13C values over 20 cm, followed by a 14 cm interval in which δ13C is 2‰ lighter than uppermost Paleocene values. After accounting for effects of diagenetic alteration, we use δ18O and Mg/Ca values from foraminiferal tests to determine that intermediate and surface waters warmed by ∼5-6° at the onset of the PETM prior to the full development of the negative δ13C excursion. After this initial warming, sea temperatures were relatively stable through the PETM but declined abruptly across the horizon that truncates the event at this site. Mg/Ca analysis of foraminiferal tests indicates peak intermediate and surface water temperatures of ∼19 and ∼32°C, respectively. These temperatures may be influenced by residual diagenetic factors and changes in ocean circulation, and surface water values may also be biased towards warm-season temperatures.
dc.publisherCopernicus GmbH
dc.rightsAuthor/s retain copyright
dc.sourceClimate of the Past
dc.titleThe Paleocene-Eocene Thermal Maximum at DSDP Site 277, Campbell Plateau, southern Pacific Ocean
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume11
dc.date.issued2015
local.identifier.absfor040200 - GEOCHEMISTRY
local.identifier.absfor040300 - GEOLOGY
local.identifier.ariespublicationU3488905xPUB5608
local.type.statusPublished Version
local.contributor.affiliationHollis, C J, GNS science
local.contributor.affiliationHines, B.R., Victoria University of Wellington
local.contributor.affiliationLittler, K., University of California – Santa Cruz
local.contributor.affiliationVillasante-Marcos, V., Instituto Geográfico Nacional
local.contributor.affiliationKulhanek, D.K., Texas A&M University
local.contributor.affiliationStrong, C.P, Institute of Geological and Nuclear Sciences
local.contributor.affiliationZachos, James , University of California
local.contributor.affiliationEggins, Stephen, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationNorthcote, L., National Institute of Water and Atmosphere
local.contributor.affiliationPhillips, A., GNS Science
local.bibliographicCitation.issue7
local.bibliographicCitation.startpage1009
local.bibliographicCitation.lastpage1025
local.identifier.doi10.5194/cp-11-1009-2015
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
dc.date.updated2016-06-14T08:45:43Z
local.identifier.scopusID2-s2.0-84938504291
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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