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Geological Society, London, Special Publications; 2006; v. 267; p. 129-140;
DOI: 10.1144/GSL.SP.2006.267.01.09
© 2006 Geological Society of London

Sediment mineralogy based on visible and near-infrared reflectance spectroscopy

Richard D. Jarrard & Michael D. Vanden Berg1

Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112, USA
1 Utah Geological Survey, Energy and Minerals Section, 1594 W. North Temple, Salt Lake City, UT 84114, USA jarrard{at}earth.utah.edu

Visible 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.





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[Abstract] [PDF]