georefid:2007-038743SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2007-038743<gco:CharacterString>Sediment mineralogy based on visible and near-infrared reflectance spectroscopy</gco:CharacterString>2006-01-01publicationgeorefid:2007-038743Jarrard, Richard D.University of Utah, Department of Geology and Geophysics, Salt Lake City, UT, United StatesauthorVanden Berg, Michael D.authorGeological Society of London, London, United KingdompublisherdocumentHardcopyIn: Rothwell, R. Guy (editor), New techniques in sediment core analysis267129-140Visible and near-infrared spectroscopy (VNIS) can be used to measure reflectance spectra (wavelength 350-2500 nm) for sediment cores and samples. A local ground-truth calibration of spectral features to mineral percentages is calculated by measuring reflectance spectra for a suite of samples of known mineralogy. This approach has been tested on powders, core plugs and split cores, and we conclude that it works well on all three, unless pore water is present. Initial VNIS studies have concentrated on determination of relative proportions of carbonate, opal, smectite and illite in equatorial Pacific sediments. Shipboard VNIS-based determination of these four components was demonstrated on Ocean Drilling Program Leg 199.completedSedimentary petrologyApplied geophysicscarbonatesclay mineralscoresEast PacificEast Pacific Riseframework silicatesinstrumentsLeg 138Leg 199mineral compositionnear-infrared spectraOcean Drilling ProgramODP Site 846ODP Site 847opalorganic compoundsPacific Oceanpetrographysedimentssheet silicatessilica mineralssilicatessmectitespectratechniquesvisible and near-infrared spectraVNISwell-loggingurn:org.iodp:exp:138urnlargerWorkCitationcampaignurn:org.iodp:exp:199urnlargerWorkCitationcampaignurn:org.iodp:exp:138:site:846urnlargerWorkCitationstudyurn:org.iodp:exp:138urnlargerWorkCitationcampaignurn:org.iodp:exp:138:site:847urnlargerWorkCitationstudyurn:org.iodp:exp:138urnlargerWorkCitationcampaignEnglishgeoscientificInformation-148.0000-90.4904-3.054926.0500