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Article: Geochemical composition of inner shelf Quaternary sediments in the northern South China Sea with implications for provenance discrimination and paleoenvironmental reconstruction

TitleGeochemical composition of inner shelf Quaternary sediments in the northern South China Sea with implications for provenance discrimination and paleoenvironmental reconstruction
Authors
KeywordsContinental Shelf
East Asian Monsoon
Geochemical Composition
Hong Kong
Paleoenvironmental Change
Provenance Discrimination
Quaternary
South China Sea
Issue Date2008
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/gloplacha
Citation
Global And Planetary Change, 2008, v. 60 n. 3-4, p. 207-221 How to Cite?
AbstractSediment samples were collected from a borehole in the northern South China Sea with the depositional age back to 400 ka BP, for grain size and geochemical analyses to constrain the sediment provenance and paleoenvironmental variability. Geochemical indices of Th/Sc, Ti/Nb and Th/Nb ratios suggest that the Zhujiang (Pearl River) was the main provenance of the inner shelf sediments of Hong Kong deposited during interglacial periods, whereas the locally-derived granitoids contributed significantly to the exposed inner shelf through the incision of local streams during glacial periods. Furthermore, the influence of the Zhujiang-derived sediments on the inner shelf of Hong Kong varied spatially and temporally with different sea-level changes during the past 400 kyr. Chemical weathering indices suggest hot and wet climate conditions were dominant in South China during interglacial periods of marine isotope stages (MIS) 7, 9 and 11 whereas a dry and cold paleoclimate prevailed during glacial periods of MIS 6 which accounts for weak chemical weathering and coarse-grained deposition on the inner shelf. The Holocene and last interglacial period did not see more intense chemical weathering in the Zhujiang drainage basin than other interglacial periods. Although the high resolution paleoenvironmental changes can not be easily reconstructed due to ubiquitous unconformity in the sedimentary strata and weak age controls compared to the deep sea sedimentation, the present study sheds new lights on the understanding of the transport process of the Zhujiang sediment in the deep ocean and provides a teleconnection of East Asian palaeomonsoon activity between South China, the inland and open sea areas. © 2007 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/182415
ISSN
2015 Impact Factor: 3.548
2015 SCImago Journal Rankings: 1.885
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYang, Sen_US
dc.contributor.authorYim, WWSen_US
dc.contributor.authorHuang, Gen_US
dc.date.accessioned2013-04-29T04:00:06Z-
dc.date.available2013-04-29T04:00:06Z-
dc.date.issued2008en_US
dc.identifier.citationGlobal And Planetary Change, 2008, v. 60 n. 3-4, p. 207-221en_US
dc.identifier.issn0921-8181en_US
dc.identifier.urihttp://hdl.handle.net/10722/182415-
dc.description.abstractSediment samples were collected from a borehole in the northern South China Sea with the depositional age back to 400 ka BP, for grain size and geochemical analyses to constrain the sediment provenance and paleoenvironmental variability. Geochemical indices of Th/Sc, Ti/Nb and Th/Nb ratios suggest that the Zhujiang (Pearl River) was the main provenance of the inner shelf sediments of Hong Kong deposited during interglacial periods, whereas the locally-derived granitoids contributed significantly to the exposed inner shelf through the incision of local streams during glacial periods. Furthermore, the influence of the Zhujiang-derived sediments on the inner shelf of Hong Kong varied spatially and temporally with different sea-level changes during the past 400 kyr. Chemical weathering indices suggest hot and wet climate conditions were dominant in South China during interglacial periods of marine isotope stages (MIS) 7, 9 and 11 whereas a dry and cold paleoclimate prevailed during glacial periods of MIS 6 which accounts for weak chemical weathering and coarse-grained deposition on the inner shelf. The Holocene and last interglacial period did not see more intense chemical weathering in the Zhujiang drainage basin than other interglacial periods. Although the high resolution paleoenvironmental changes can not be easily reconstructed due to ubiquitous unconformity in the sedimentary strata and weak age controls compared to the deep sea sedimentation, the present study sheds new lights on the understanding of the transport process of the Zhujiang sediment in the deep ocean and provides a teleconnection of East Asian palaeomonsoon activity between South China, the inland and open sea areas. © 2007 Elsevier B.V. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/gloplachaen_US
dc.relation.ispartofGlobal and Planetary Changeen_US
dc.subjectContinental Shelfen_US
dc.subjectEast Asian Monsoonen_US
dc.subjectGeochemical Compositionen_US
dc.subjectHong Kongen_US
dc.subjectPaleoenvironmental Changeen_US
dc.subjectProvenance Discriminationen_US
dc.subjectQuaternaryen_US
dc.subjectSouth China Seaen_US
dc.titleGeochemical composition of inner shelf Quaternary sediments in the northern South China Sea with implications for provenance discrimination and paleoenvironmental reconstructionen_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.gloplacha.2007.02.005en_US
dc.identifier.scopuseid_2-s2.0-38349146191en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-38349146191&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume60en_US
dc.identifier.issue3-4en_US
dc.identifier.spage207en_US
dc.identifier.epage221en_US
dc.identifier.isiWOS:000253576900003-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridYang, S=7406950130en_US
dc.identifier.scopusauthoridYim, WWS=7007024728en_US
dc.identifier.scopusauthoridHuang, G=7403425099en_US

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