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Article: Radiocarbon dating and the reconstruction of late Quaternary sea-level changes in Hong Kong

TitleRadiocarbon dating and the reconstruction of late Quaternary sea-level changes in Hong Kong
Authors
Issue Date1999
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/quaint
Citation
Quaternary International, 1999, v. 55, p. 77-91 How to Cite?
AbstractRadiocarbon dating is used widely for the reconstruction of late Quaternary sea-level changes. In the present study, eight case studies in Hong Kong have been chosen to highlight the difficulty in obtaining reliable radiocarbon dates. Pre-Holocene radiocarbon dates exceeding about 8100 yr BP have been found to show a young age bias. A shell sample dated by two separate radiocarbon laboratories gave last interstadial ages differing by almost 9500 years while an oxygen-isotope stage 5e age was obtained using uranium-series dating. Other evidence including stratigraphy has shown that only the last interglacial age is acceptable. The young age bias is attributed mainly to the post-depositional introduction of 'young' carbon into the sample. For the reconstruction of sea-level changes, it is essential to select samples immediately above the base of the Holocene transgressive unit in offshore boreholes and excavations to satisfy the criteria of rapid burial. These samples should preferably include mud, plant matter and shells to facilitate interpretation. Furthermore, as many samples as possible from a range of water depths down to about 130 m below the present sea level should be dated to reduce error introduced by counting statistics so the true signal of sea-level changes can be reflected.
Persistent Identifierhttp://hdl.handle.net/10722/182402
ISSN
2015 Impact Factor: 2.067
2015 SCImago Journal Rankings: 1.123
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYim, WWSen_US
dc.date.accessioned2013-04-29T04:00:00Z-
dc.date.available2013-04-29T04:00:00Z-
dc.date.issued1999en_US
dc.identifier.citationQuaternary International, 1999, v. 55, p. 77-91en_US
dc.identifier.issn1040-6182en_US
dc.identifier.urihttp://hdl.handle.net/10722/182402-
dc.description.abstractRadiocarbon dating is used widely for the reconstruction of late Quaternary sea-level changes. In the present study, eight case studies in Hong Kong have been chosen to highlight the difficulty in obtaining reliable radiocarbon dates. Pre-Holocene radiocarbon dates exceeding about 8100 yr BP have been found to show a young age bias. A shell sample dated by two separate radiocarbon laboratories gave last interstadial ages differing by almost 9500 years while an oxygen-isotope stage 5e age was obtained using uranium-series dating. Other evidence including stratigraphy has shown that only the last interglacial age is acceptable. The young age bias is attributed mainly to the post-depositional introduction of 'young' carbon into the sample. For the reconstruction of sea-level changes, it is essential to select samples immediately above the base of the Holocene transgressive unit in offshore boreholes and excavations to satisfy the criteria of rapid burial. These samples should preferably include mud, plant matter and shells to facilitate interpretation. Furthermore, as many samples as possible from a range of water depths down to about 130 m below the present sea level should be dated to reduce error introduced by counting statistics so the true signal of sea-level changes can be reflected.en_US
dc.languageengen_US
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/quainten_US
dc.relation.ispartofQuaternary Internationalen_US
dc.titleRadiocarbon dating and the reconstruction of late Quaternary sea-level changes in Hong Kongen_US
dc.typeArticleen_US
dc.identifier.emailYim, WWS: wwsyim@hku.hken_US
dc.identifier.authorityYim, WWS=rp01746en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/S1040-6182(98)00029-9en_US
dc.identifier.scopuseid_2-s2.0-0032966740en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032966740&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume55en_US
dc.identifier.spage77en_US
dc.identifier.epage91en_US
dc.identifier.isiWOS:000079105100008-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridYim, WWS=7007024728en_US

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