{"refrec":{"BRefID":118836,"RR":"<b>Freifeld, B.M.; Kneafsey, T.J.; Rack, F.R.</b> (2006). On-site geological core analysis using a portable X-ray computed tomographic system, <b><i>in</i></b>: Rothwell, R.G. (Ed.) <i>New techniques in sediment core analysis. Geological Society Special Publication,</i> 267: pp. 165-178","BEntID":113082,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: Rothwell, R.G. (Ed.) <i>New techniques in sediment core analysis. Geological Society Special Publication,</i> 267: pp. 165-178","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Freifeld, B.M.; Kneafsey, T.J.; Rack, F.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Freifeld, B.M.; Kneafsey, T.J.; Rack, F.R.","Englishabstract":"X-ray computed tomography (CT) is an established technique for non-destructively characterizing geological cores. CT provides information on sediment structure, diagenetic alteration, fractures, flow channels and barriers, porosity and fluid-phase saturation. A portable CT imaging system has been developed specifically for imaging whole-round cores at the drilling site. The new system relies upon carefully designed radiological shielding to minimize the size and weight of the resulting instrument. Specialized X-ray beam collimators and filters maximize system sensitivity and performance. The system has been successfully deployed on the research vessel <i>JOIDES Resolution</i> for Ocean Drilling Program's legs 204 and 210, at the Ocean Drilling Program's refrigerated Gulf Coast Core Repository, as well as on the Hot Ice #1 drilling platform located near the Kuparuk Field, Alaska. A methodology for performing simple densiometry measurements, as well as scanning for gross structural features, is presented using radiographs from ODP Leg 204. Reconstructed CT images from Hot Ice #1 demonstrate the use of CT for discerning core textural features. To demonstrate the use of CT to quantitatively interpret dynamic processes, we calculate 95% confidence intervals for density changes occurring during a laboratory methane hydrate dissociation experiment. The field deployment of a CT represents a paradigm shift in core characterization, opening up the possibility for rapid systematic characterization of three-dimensional structural features, and leading to improved subsampling and core-processing procedures.","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"On-site geological core analysis using a portable X-ray computed tomographic system","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2006,"MonPub":null,"DateUpdate":"2008-01-18","DateCreate":"2008-01-18","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":118836,"PubliDate":2006,"Pagination":"165-178","XtraPublOfAnaID":null,"ISBN":"1-86239-210-2","Volume":"267","Issue":null,"BRefMon":118816,"BRefMonRR":"<b>Rothwell, R.G. (Ed.)</b> (2006). New techniques in sediment core analysis. <i>Geological Society Special Publication</i>, 267. Geological Society: London. ISBN 1-86239-210-2. 266 pp. <a href=\"https://dx.doi.org/10.1144/GSL.SP.2006.267\" target=\"_blank\">https://dx.doi.org/10.1144/GSL.SP.2006.267</a>","BRefXtra":null,"BRefXtraRR":null,"SerBRefID":5898,"SerRR":"<b>Hartley, A.J. <i>et al.</i> (Ed.)</b> Geological Society Special Publication. Geological Society of London: Oxford; London; Edinburgh; Boston, Mass.; Carlton, Vic..  ISSN 0305-8719; e-ISSN 2041-4927","StandardTitleSer":"Geological Society Special Publication","ISSN":"0305-8719","AbbrevSer":"Geol. Soc. Lond. Spec. publ.","StandardTitleMon":"New techniques in sediment core analysis","StartPage":165,"Pages":14,"ToPubliDate":null,"BRefBibLvlCode":"MS","SerNotes":null,"AutString":"Rothwell, R.G. 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