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Conference Paper: Application of magnetic susceptibility testing to offshore sediments in South East Kowloon development feasibility study

TitleApplication of magnetic susceptibility testing to offshore sediments in South East Kowloon development feasibility study
Authors
Davis, AMChan, LSYeung, CHYim, WWS
Issue Date1999
PublisherThe Institution of Engineers, Hong Kong.
Citation
Urban Ground Engineering. Proceedings Of An International Conference, Hong Kong, November 1998., 1999, p. 287-295 How to Cite?
AbstractSite investigation for the redevelopment of Kai Tak Airport in Hong Kong has produced over 350 offshore boreholes and vibrocores. Analysis of 20 continuous vibrocores from this site has revealed three zones based on magnetic susceptibility intensity (MSI). Zone 1 is characterised by relatively high MSI and corresponds to sediments enriched in heavy metals; Zone 2 by low susceptibility intensities associated with Holocene sedimentation since the last marine transgression; and Zone 3 medium intensities and corresponds to sediments deposited during the Pleistocene. Holocene sediments have appreciably lower magnetic susceptibility intensity than their pre-Holocene counterparts. This is probably due to the dominance of non-magnetic iron in the form of pyrite in Holocene sediments and oxidation of pyrite to maghemite in the pre-Holocene during a low sea-level stand proceeding the Holocene transgression. Magnetic susceptibility testing is concluded to be a low cost, rapid, non-destructive and useful technique for assisting marine site investigation.
Persistent Identifierhttp://hdl.handle.net/10722/117323

 

DC FieldValueLanguage
dc.contributor.authorDavis, AMen_HK
dc.contributor.authorChan, LSen_HK
dc.contributor.authorYeung, CHen_HK
dc.contributor.authorYim, WWSen_HK
dc.date.accessioned2010-09-26T07:11:31Z-
dc.date.available2010-09-26T07:11:31Z-
dc.date.issued1999en_HK
dc.identifier.citationUrban Ground Engineering. Proceedings Of An International Conference, Hong Kong, November 1998., 1999, p. 287-295en_HK
dc.identifier.urihttp://hdl.handle.net/10722/117323-
dc.description.abstractSite investigation for the redevelopment of Kai Tak Airport in Hong Kong has produced over 350 offshore boreholes and vibrocores. Analysis of 20 continuous vibrocores from this site has revealed three zones based on magnetic susceptibility intensity (MSI). Zone 1 is characterised by relatively high MSI and corresponds to sediments enriched in heavy metals; Zone 2 by low susceptibility intensities associated with Holocene sedimentation since the last marine transgression; and Zone 3 medium intensities and corresponds to sediments deposited during the Pleistocene. Holocene sediments have appreciably lower magnetic susceptibility intensity than their pre-Holocene counterparts. This is probably due to the dominance of non-magnetic iron in the form of pyrite in Holocene sediments and oxidation of pyrite to maghemite in the pre-Holocene during a low sea-level stand proceeding the Holocene transgression. Magnetic susceptibility testing is concluded to be a low cost, rapid, non-destructive and useful technique for assisting marine site investigation.en_HK
dc.languageengen_HK
dc.publisherThe Institution of Engineers, Hong Kong.en_HK
dc.relation.ispartofUrban ground engineering. Proceedings of an international conference, Hong Kong, November 1998.en_HK
dc.titleApplication of magnetic susceptibility testing to offshore sediments in South East Kowloon development feasibility studyen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailChan, LS: chanls@hku.hken_HK
dc.identifier.emailYim, WWS: wwsyim@hku.hken_HK
dc.identifier.authorityChan, LS=rp00665en_HK
dc.identifier.authorityYim, WWS=rp01746en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0033401235en_HK
dc.identifier.hkuros47023en_HK
dc.identifier.spage287en_HK
dc.identifier.epage295en_HK
dc.identifier.scopusauthoridDavis, AM=7404295484en_HK
dc.identifier.scopusauthoridChan, LS=7403540528en_HK
dc.identifier.scopusauthoridYeung, CH=36848789500en_HK
dc.identifier.scopusauthoridYim, WWS=7007024728en_HK

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