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Article: The role of sea-level rise, monsoonal discharge and the palaeo-landscape in the early Holocene evolution of the Pearl River delta, southern China

TitleThe role of sea-level rise, monsoonal discharge and the palaeo-landscape in the early Holocene evolution of the Pearl River delta, southern China
Authors
KeywordsCoastal Evolution
Microfossil Diatoms
Monsoonal Discharge
Palaeo-Incised Valleys
Pearl River Delta
Sea-Level Rise
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/quascirev
Citation
Quaternary Science Reviews, 2012, v. 54, p. 77-88 How to Cite?
AbstractThe early Holocene history of the Pearl River delta is reconstructed based on a series of sediment cores obtained from one of the main palaeo-valleys in the basin. Sedimentary and microfossil diatom analyses combined with radiocarbon dating provide new evidence for the interactions between sea-level rise, antecedent topography and sedimentary discharge changes within the deltaic basin since the last glacial. These new records show that river channels of last glacial age incised down to c. -40 m into an older (possibly MIS5 age) marine sequence which forms the floor of the deltaic basin and exists primarily at c. 10 m-15 m below present mean sea level. Rapid postglacial sea-level rise flooded the incised valleys by the beginning of the Holocene, and prior to c. 9000 cal. years BP, marine inundation was largely confined within these incised valleys. The confined available accommodation space of the incised valleys combined with strong monsoon-driven freshwater, high sediment discharge and a period of rapid rising sea level meant that sedimentation rates were exceptionally high. Towards c. 8000 cal. years BP as sea level rose to about -5 m, marine inundation spilled out of the incised valleys and the sea flooded the whole deltaic basin. As a result, the mouth of the Pearl River was forced to retreat to the apex of the deltaic basin, water salinity within the basin increased markedly as the previously confined system dispersed across the basin, and the sedimentation changed from fluvial dominated to tidal dominated. Sea level continued to rise, albeit at a much reduced rate between 8000 and 7000 cal. years BP, and deltaic sedimentation was concentrated around the apex area of the basin. During the last 7000 cal. years BP, the delta shoreline moved seawards, and the sedimentary processes changed gradually from tidal dominated to fluvial dominated. © 2012 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/151355
ISSN
2015 Impact Factor: 4.521
2015 SCImago Journal Rankings: 2.928
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZong, Yen_US
dc.contributor.authorHuang, Ken_US
dc.contributor.authorYu, Fen_US
dc.contributor.authorZheng, Zen_US
dc.contributor.authorSwitzer, ADen_US
dc.contributor.authorHuang, Gen_US
dc.contributor.authorWang, Nen_US
dc.contributor.authorTang, Men_US
dc.date.accessioned2012-06-26T06:21:03Z-
dc.date.available2012-06-26T06:21:03Z-
dc.date.issued2012en_US
dc.identifier.citationQuaternary Science Reviews, 2012, v. 54, p. 77-88en_US
dc.identifier.issn0277-3791en_US
dc.identifier.urihttp://hdl.handle.net/10722/151355-
dc.description.abstractThe early Holocene history of the Pearl River delta is reconstructed based on a series of sediment cores obtained from one of the main palaeo-valleys in the basin. Sedimentary and microfossil diatom analyses combined with radiocarbon dating provide new evidence for the interactions between sea-level rise, antecedent topography and sedimentary discharge changes within the deltaic basin since the last glacial. These new records show that river channels of last glacial age incised down to c. -40 m into an older (possibly MIS5 age) marine sequence which forms the floor of the deltaic basin and exists primarily at c. 10 m-15 m below present mean sea level. Rapid postglacial sea-level rise flooded the incised valleys by the beginning of the Holocene, and prior to c. 9000 cal. years BP, marine inundation was largely confined within these incised valleys. The confined available accommodation space of the incised valleys combined with strong monsoon-driven freshwater, high sediment discharge and a period of rapid rising sea level meant that sedimentation rates were exceptionally high. Towards c. 8000 cal. years BP as sea level rose to about -5 m, marine inundation spilled out of the incised valleys and the sea flooded the whole deltaic basin. As a result, the mouth of the Pearl River was forced to retreat to the apex of the deltaic basin, water salinity within the basin increased markedly as the previously confined system dispersed across the basin, and the sedimentation changed from fluvial dominated to tidal dominated. Sea level continued to rise, albeit at a much reduced rate between 8000 and 7000 cal. years BP, and deltaic sedimentation was concentrated around the apex area of the basin. During the last 7000 cal. years BP, the delta shoreline moved seawards, and the sedimentary processes changed gradually from tidal dominated to fluvial dominated. © 2012 Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/quascireven_US
dc.relation.ispartofQuaternary Science Reviewsen_US
dc.subjectCoastal Evolutionen_US
dc.subjectMicrofossil Diatomsen_US
dc.subjectMonsoonal Dischargeen_US
dc.subjectPalaeo-Incised Valleysen_US
dc.subjectPearl River Deltaen_US
dc.subjectSea-Level Riseen_US
dc.titleThe role of sea-level rise, monsoonal discharge and the palaeo-landscape in the early Holocene evolution of the Pearl River delta, southern Chinaen_US
dc.typeArticleen_US
dc.identifier.emailZong, Y: yqzong@hku.hken_US
dc.identifier.authorityZong, Y=rp00846en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.quascirev.2012.01.002en_US
dc.identifier.scopuseid_2-s2.0-84867702604en_US
dc.identifier.hkuros212547-
dc.identifier.volume54-
dc.identifier.spage77-
dc.identifier.epage88-
dc.identifier.isiWOS:000310948100007-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZong, Y=7005203454en_US
dc.identifier.scopusauthoridHuang, K=15922819600en_US
dc.identifier.scopusauthoridYu, F=35747418400en_US
dc.identifier.scopusauthoridZheng, Z=54912256900en_US
dc.identifier.scopusauthoridSwitzer, A=10738884500en_US
dc.identifier.scopusauthoridHuang, G=54912296300en_US
dc.identifier.scopusauthoridWang, N=8883516500en_US
dc.identifier.scopusauthoridTang, M=54910890700en_US
dc.identifier.citeulike10294198-

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