Marine carbon reservoir variability in Torres Strait: preliminary results of AMS dating of live-collected shell specimens.

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dc.contributor.authorUlm, Sen_AU
dc.contributor.authorBarham, AJen_AU
dc.contributor.authorDavid, Ben_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorMcNiven, IJen_AU
dc.contributor.authorPetchey, Fen_AU
dc.contributor.authorRowland, MJen_AU
dc.date.accessioned2009-12-07en_AU
dc.date.accessioned2010-04-30T04:57:10Zen_AU
dc.date.available2009-12-07en_AU
dc.date.available2010-04-30T04:57:10Zen_AU
dc.date.issued2007-07en_AU
dc.date.statistics2007-07en_AU
dc.description.abstractDespite routine dating of marine shell by Quaternary scientists in the Torres Strait region, no systematic evaluation of the applicability of the recommended DeltaR value has been undertaken. This value can be shown to be problematic. It is based on only three samples from Torres Strait and two from the west coast of Cape York Peninsula, together spanning 125±60 to -14±60 years; the samples are from different oceanographic provinces; the dated taxa are not amongst those commonly dated by contemporary researchers; and all of the dates were obtained over 20 years ago before the advent of high precision AMS dating. This project attempts to address this deficiency through the dating of a suite of well-provenanced live-collected shell specimens using the high precision ANTARES AMS facilities at ANSTO. Dated samples are largely derived from a unique assemblage of well-documented live-collected shell specimens in the Australian Museum from Murray Island and Albany Passage collected by Charles Hedley in August-October 1907, supplemented by smaller collections from elsewhere in Torres Strait. Sample selection focused on suspension-feeders (Arcidae, Mesodesmatidae, Veneridae), although carnivores (Volutidae), herbivores/omnivores (Neritidae) and algae grazers (Trochidae) were included to examine inter-taxa variability. Preliminary results help establish more robust regional DeltaR values for the region based on shellfish commonly dated by Quaternary scientists and allow examination of localised variability in DeltaR values. These findings have broad implications for refining chronologies in coastal archaeology and geomorphology in the Torres Strait region, including studies of sea-level change, reef and coral cay development, coastal dune sequences, storm event frequency and archaeological trends.en_AU
dc.description.sponsorshipInternational Union for Quaternary Researchen_AU
dc.identifier.citationUlm, S., Barham, A. J., David, B., Jacobsen, G. E., McNiven, I J., & Petchey, F., & Rowland, M. J. (2007). Marine carbon reservoir variability in Torres Strait: preliminary results of AMS dating of live-collected shell specimens. Presentation to the International Union for Quaternary Research XVII Congress (INQUA) – “The Tropics: Heat Engine of the Quaternary”, 28th July – 3rd August 2007. Cairns, Australia: Cairns Convention Centre.en_AU
dc.identifier.conferenceenddate3 August 2007en_AU
dc.identifier.conferencenamenternational Union for Quaternary Research XVII Congress (INQUA) – “The Tropics: Heat Engine of the Quaternaryen_AU
dc.identifier.conferenceplaceCairns, Australiaen_AU
dc.identifier.conferencestartdate28 July 2007en_AU
dc.identifier.govdoc1046en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2590en_AU
dc.language.isoenen_AU
dc.publisherInternational Union for Quaternary Researchen_AU
dc.subjectShellsen_AU
dc.subjectCarbonen_AU
dc.subjectWater reservoirsen_AU
dc.subjectIsotope datingen_AU
dc.subjectMass spectroscopyen_AU
dc.subjectAcceleratorsen_AU
dc.titleMarine carbon reservoir variability in Torres Strait: preliminary results of AMS dating of live-collected shell specimens.en_AU
dc.typeConference Abstracten_AU
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