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Article: Stratigraphy and optically stimulated luminescence dating of subaerially exposed Quaternary deposits from two shallow bays in Hong Kong, China

TitleStratigraphy and optically stimulated luminescence dating of subaerially exposed Quaternary deposits from two shallow bays in Hong Kong, China
Authors
Issue Date2008
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/quaint
Citation
Quaternary International, 2008, v. 183 n. 1, p. 23-39 How to Cite?
AbstractEpisodes of subaerial exposure recorded in Quaternary sedimentary sequences on continental shelves are indicators of sea-level change. In this study, the Quaternary superficial deposits from two shallow bays in Hong Kong are examined in order to identify the timing of such episodes. Two rotary boreholes in Tai O Bay penetrated a succession of marine and terrestrial deposits formed during the last four interglacial-glacial cycles. The interglacial periods and the glacial periods are found to be represented by siliciclastic-dominated shallow marine-estuarine deposits and colluvial-alluvial fan deposits, respectively. An excavation of a coastal land reclamation in Deep Bay revealed Holocene intertidal-subtidal estuarine deposits overlying aeolian deposits of the last glacial age. Optically stimulated luminescence dating carried out has confirmed the last glacial age of the terrestrial unit unconformably overlain by the Holocene marine unit but only minimum ages can be obtained from the pre-last glacial terrestrial units. In one of the Tai O boreholes studied, the density and moisture content distribution is found to reflect the episodes of subaerial exposure of the pre-Holocene interglacial marine units. In the palaeo-desiccated crusts of these units, density increases through iron cementation resulting from acid-sulphate soil development while moisture content decreases as a consequence of desiccation. Quaternary terrestrial deposits occurring on continental shelves are therefore datable to a greater degree of certainty than their subaerial counterparts. © 2007 Elsevier Ltd and INQUA.
Persistent Identifierhttp://hdl.handle.net/10722/182416
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.contributor.authorHilgers, Aen_US
dc.contributor.authorHuang, Gen_US
dc.contributor.authorRadtke, Uen_US
dc.date.accessioned2013-04-29T04:00:07Z-
dc.date.available2013-04-29T04:00:07Z-
dc.date.issued2008en_US
dc.identifier.citationQuaternary International, 2008, v. 183 n. 1, p. 23-39en_US
dc.identifier.issn1040-6182en_US
dc.identifier.urihttp://hdl.handle.net/10722/182416-
dc.description.abstractEpisodes of subaerial exposure recorded in Quaternary sedimentary sequences on continental shelves are indicators of sea-level change. In this study, the Quaternary superficial deposits from two shallow bays in Hong Kong are examined in order to identify the timing of such episodes. Two rotary boreholes in Tai O Bay penetrated a succession of marine and terrestrial deposits formed during the last four interglacial-glacial cycles. The interglacial periods and the glacial periods are found to be represented by siliciclastic-dominated shallow marine-estuarine deposits and colluvial-alluvial fan deposits, respectively. An excavation of a coastal land reclamation in Deep Bay revealed Holocene intertidal-subtidal estuarine deposits overlying aeolian deposits of the last glacial age. Optically stimulated luminescence dating carried out has confirmed the last glacial age of the terrestrial unit unconformably overlain by the Holocene marine unit but only minimum ages can be obtained from the pre-last glacial terrestrial units. In one of the Tai O boreholes studied, the density and moisture content distribution is found to reflect the episodes of subaerial exposure of the pre-Holocene interglacial marine units. In the palaeo-desiccated crusts of these units, density increases through iron cementation resulting from acid-sulphate soil development while moisture content decreases as a consequence of desiccation. Quaternary terrestrial deposits occurring on continental shelves are therefore datable to a greater degree of certainty than their subaerial counterparts. © 2007 Elsevier Ltd and INQUA.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.titleStratigraphy and optically stimulated luminescence dating of subaerially exposed Quaternary deposits from two shallow bays in Hong Kong, Chinaen_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/j.quaint.2007.07.004en_US
dc.identifier.scopuseid_2-s2.0-44049099854en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-44049099854&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume183en_US
dc.identifier.issue1en_US
dc.identifier.spage23en_US
dc.identifier.epage39en_US
dc.identifier.isiWOS:000257255700003-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridYim, WWS=7007024728en_US
dc.identifier.scopusauthoridHilgers, A=7004841661en_US
dc.identifier.scopusauthoridHuang, G=7403425099en_US
dc.identifier.scopusauthoridRadtke, U=7004153339en_US

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