File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Stratigraphy of Quaternary inner-shelf sediments in Tai O Bay, Hong Kong, based on ground-truthed seismic profiles

TitleStratigraphy of Quaternary inner-shelf sediments in Tai O Bay, Hong Kong, based on ground-truthed seismic profiles
Authors
Issue Date2005
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00367/index.htm
Citation
Geo-Marine Letters, 2005, v. 25 n. 1, p. 20-33 How to Cite?
AbstractHigh-resolution boomer profiles from Tai O Bay, Hong Kong SAR, were ground-truthed using ten discontinuously sampled boreholes penetrating bedrock with a maximum length of 82.1 m. The relationship between depth below seabed and seismic profiles was established through the measurement of two borehole compressional-wave velocity profiles. In departure from previous interpretations, nine Quaternary seismic units were identified, which can be divided into eight systems tracts formed by cycles of fourth-order sea-level fluctuations dating back at least to marine isotope stage (MIS) 7 (ca. 190-245 ka). These consist of two lowstand systems tracts, two transgressive systems tracts, and four highstand systems tracts. Secondary unconformities within the highstand deposits are interpreted to document fifth-order sea-level fluctuations. Lowstand deposits are less common because, as soon as the sea level drops by a few metres, Tai O Bay becomes sub-aerially exposed, leading to widespread non-deposition or erosion. At the same time, extensive fluvial erosion and channel incision take place. Filling of the fluvial channels occurs during rising sea level. Lowstand sediments (if present) are generally landslide deposits laid down on a basal alluvial plain. Uncorrected accelerator mass spectrometry (AMS) radiocarbon dates of mollusc shells show that the depositional environment was marine since 6.2 ka, becoming gradually more brackish as a result of progradation of the Pearl River delta. The computed average sedimentation rate for the period 6.2-4.1 ka is 4.4 m/1,000 year, and approximately 1 m/1,000 year since 4.1 ka. © Springer-Verlag 2005.
Persistent Identifierhttp://hdl.handle.net/10722/151136
ISSN
2015 Impact Factor: 1.577
2015 SCImago Journal Rankings: 0.741
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorBahr, Aen_HK
dc.contributor.authorWong, HKen_HK
dc.contributor.authorYim, WWSen_HK
dc.contributor.authorHuang, Gen_HK
dc.contributor.authorLüdmann, Ten_HK
dc.contributor.authorChan, LSen_HK
dc.contributor.authorRidley Thomas, WNen_HK
dc.date.accessioned2012-06-26T06:17:34Z-
dc.date.available2012-06-26T06:17:34Z-
dc.date.issued2005en_HK
dc.identifier.citationGeo-Marine Letters, 2005, v. 25 n. 1, p. 20-33en_HK
dc.identifier.issn0276-0460en_HK
dc.identifier.urihttp://hdl.handle.net/10722/151136-
dc.description.abstractHigh-resolution boomer profiles from Tai O Bay, Hong Kong SAR, were ground-truthed using ten discontinuously sampled boreholes penetrating bedrock with a maximum length of 82.1 m. The relationship between depth below seabed and seismic profiles was established through the measurement of two borehole compressional-wave velocity profiles. In departure from previous interpretations, nine Quaternary seismic units were identified, which can be divided into eight systems tracts formed by cycles of fourth-order sea-level fluctuations dating back at least to marine isotope stage (MIS) 7 (ca. 190-245 ka). These consist of two lowstand systems tracts, two transgressive systems tracts, and four highstand systems tracts. Secondary unconformities within the highstand deposits are interpreted to document fifth-order sea-level fluctuations. Lowstand deposits are less common because, as soon as the sea level drops by a few metres, Tai O Bay becomes sub-aerially exposed, leading to widespread non-deposition or erosion. At the same time, extensive fluvial erosion and channel incision take place. Filling of the fluvial channels occurs during rising sea level. Lowstand sediments (if present) are generally landslide deposits laid down on a basal alluvial plain. Uncorrected accelerator mass spectrometry (AMS) radiocarbon dates of mollusc shells show that the depositional environment was marine since 6.2 ka, becoming gradually more brackish as a result of progradation of the Pearl River delta. The computed average sedimentation rate for the period 6.2-4.1 ka is 4.4 m/1,000 year, and approximately 1 m/1,000 year since 4.1 ka. © Springer-Verlag 2005.en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00367/index.htmen_HK
dc.relation.ispartofGeo-Marine Lettersen_HK
dc.titleStratigraphy of Quaternary inner-shelf sediments in Tai O Bay, Hong Kong, based on ground-truthed seismic profilesen_HK
dc.typeArticleen_HK
dc.identifier.emailYim, WWS: wwsyim@hku.hken_HK
dc.identifier.emailChan, LS: chanls@hku.hken_HK
dc.identifier.authorityYim, WWS=rp01746en_HK
dc.identifier.authorityChan, LS=rp00665en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1007/s00367-004-0185-yen_HK
dc.identifier.scopuseid_2-s2.0-14244266199en_HK
dc.identifier.hkuros109495-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-14244266199&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume25en_HK
dc.identifier.issue1en_HK
dc.identifier.spage20en_HK
dc.identifier.epage33en_HK
dc.identifier.isiWOS:000227046600003-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridBahr, A=8203181800en_HK
dc.identifier.scopusauthoridWong, HK=7402864543en_HK
dc.identifier.scopusauthoridYim, WWS=7007024728en_HK
dc.identifier.scopusauthoridHuang, G=7403425099en_HK
dc.identifier.scopusauthoridLüdmann, T=6603371494en_HK
dc.identifier.scopusauthoridChan, LS=7403540528en_HK
dc.identifier.scopusauthoridRidley Thomas, WN=6507028548en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats