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Article: Postglacial sea-level changes in the northern South China Sea continental shelf: Evidence for a post-8200 calendar yr BP meltwater pulse
Title | Postglacial sea-level changes in the northern South China Sea continental shelf: Evidence for a post-8200 calendar yr BP meltwater pulse |
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Authors | |
Issue Date | 2006 |
Publisher | Elsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/quaint |
Citation | Quaternary International, 2006, v. 145-146, p. 55-67 How to Cite? |
Abstract | A postglacial sea-level record reconstructed through the study of 25 cores and 10 grab samples obtained from the siliciclastic-dominated northern South China Sea continental shelf between Hong Kong and Dongsha is presented. The seven sedimentary facies recognized are: (1) Pleistocene overconsolidated mud facies affected by palaeosol development due to sub-aerial exposure during the Last Glacial Maximum (LGM), (2) bioclastic sandy gravel facies occurring at a present-day se abed depth exceeding 120 m, (3) LGM bioclastic beach-dune sand facies at a present-day seabed depth between 110 and 120 m, (4) postglacial siliciclastic beach-dune sand facies formed during at least two episodes of sea-level stillstands at present-day seabed depths between 80 and 90 m, and 30 and 50 m, respectively, (5) postglacial transgressive sand facies of Late Pleistocene to Early Holocene age: radiocarbon dating shows that this facies was deposited in two stages before and after the 8200 calendar yr BP cold event, (6) pos tglacial sand and gravel-dominated facies with acoustic turbidity at a present-day seabed depth of about 50 m, (7) postglacial mud facies. Based on the radiocarbon ages obtained from samples located above and below the Holocene-Pleistocene hiatus in the two innermost shelf cores, and large variations of atmospheric radiocarbon concentration found during the last glacial period in a submerged stalagmite from the Bahamas (Beck et al., 2001. Science 292, 2453-2458), ages exceeding 8200 calendar yr BP are likely to represent minimum values. Ages postdating this limit, which are less affected by variations of atmospheric radiocarbon concentration, indicate the presence of a post-8200 calendar yr BP cold event meltwater pulse caused by eustatic sea-level rise from approximately 40 m below present to the present level by about 6000 calendar yr BP. Inaccuracies of the pre-8200 calendar yr BP radiocarbon ages may be attributed to large variations of atmospheric Δ14C during the postglacial period with greenhouse gases released from the sub-aerially exposed continental shelf probably accounting for a significant proportion. © 2005 Elsevier Ltd and INQUA. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/182412 |
ISSN | 2023 Impact Factor: 1.9 2023 SCImago Journal Rankings: 0.666 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Yim, WWS | en_US |
dc.contributor.author | Huang, G | en_US |
dc.contributor.author | Fontugne, MR | en_US |
dc.contributor.author | Hale, RE | en_US |
dc.contributor.author | Paterne, M | en_US |
dc.contributor.author | Pirazzoli, PA | en_US |
dc.contributor.author | Ridley Thomas, WN | en_US |
dc.date.accessioned | 2013-04-29T04:00:05Z | - |
dc.date.available | 2013-04-29T04:00:05Z | - |
dc.date.issued | 2006 | en_US |
dc.identifier.citation | Quaternary International, 2006, v. 145-146, p. 55-67 | en_US |
dc.identifier.issn | 1040-6182 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/182412 | - |
dc.description.abstract | A postglacial sea-level record reconstructed through the study of 25 cores and 10 grab samples obtained from the siliciclastic-dominated northern South China Sea continental shelf between Hong Kong and Dongsha is presented. The seven sedimentary facies recognized are: (1) Pleistocene overconsolidated mud facies affected by palaeosol development due to sub-aerial exposure during the Last Glacial Maximum (LGM), (2) bioclastic sandy gravel facies occurring at a present-day se abed depth exceeding 120 m, (3) LGM bioclastic beach-dune sand facies at a present-day seabed depth between 110 and 120 m, (4) postglacial siliciclastic beach-dune sand facies formed during at least two episodes of sea-level stillstands at present-day seabed depths between 80 and 90 m, and 30 and 50 m, respectively, (5) postglacial transgressive sand facies of Late Pleistocene to Early Holocene age: radiocarbon dating shows that this facies was deposited in two stages before and after the 8200 calendar yr BP cold event, (6) pos tglacial sand and gravel-dominated facies with acoustic turbidity at a present-day seabed depth of about 50 m, (7) postglacial mud facies. Based on the radiocarbon ages obtained from samples located above and below the Holocene-Pleistocene hiatus in the two innermost shelf cores, and large variations of atmospheric radiocarbon concentration found during the last glacial period in a submerged stalagmite from the Bahamas (Beck et al., 2001. Science 292, 2453-2458), ages exceeding 8200 calendar yr BP are likely to represent minimum values. Ages postdating this limit, which are less affected by variations of atmospheric radiocarbon concentration, indicate the presence of a post-8200 calendar yr BP cold event meltwater pulse caused by eustatic sea-level rise from approximately 40 m below present to the present level by about 6000 calendar yr BP. Inaccuracies of the pre-8200 calendar yr BP radiocarbon ages may be attributed to large variations of atmospheric Δ14C during the postglacial period with greenhouse gases released from the sub-aerially exposed continental shelf probably accounting for a significant proportion. © 2005 Elsevier Ltd and INQUA. All rights reserved. | en_US |
dc.language | eng | en_US |
dc.publisher | Elsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/quaint | en_US |
dc.relation.ispartof | Quaternary International | en_US |
dc.title | Postglacial sea-level changes in the northern South China Sea continental shelf: Evidence for a post-8200 calendar yr BP meltwater pulse | en_US |
dc.type | Article | en_US |
dc.identifier.email | Yim, WWS: wwsyim@hku.hk | en_US |
dc.identifier.authority | Yim, WWS=rp01746 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.quaint.2005.07.005 | en_US |
dc.identifier.scopus | eid_2-s2.0-30344439556 | en_US |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-30344439556&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 145-146 | en_US |
dc.identifier.spage | 55 | en_US |
dc.identifier.epage | 67 | en_US |
dc.identifier.isi | WOS:000234847600005 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | Yim, WWS=7007024728 | en_US |
dc.identifier.scopusauthorid | Huang, G=7403425099 | en_US |
dc.identifier.scopusauthorid | Fontugne, MR=7006220612 | en_US |
dc.identifier.scopusauthorid | Hale, RE=11140800800 | en_US |
dc.identifier.scopusauthorid | Paterne, M=7004691218 | en_US |
dc.identifier.scopusauthorid | Pirazzoli, PA=7005967586 | en_US |
dc.identifier.scopusauthorid | Ridley Thomas, WN=6507028548 | en_US |
dc.identifier.issnl | 1040-6182 | - |