Visualising mineralogical heterogeneities and texture in a mudstone concretion using hyperspectral imaging
It is often difficult to identify and quantify mineralogical heterogeneities on the centimetre to metre scale by optical means, when these heterogeneities have apparently similar colours. Therefore, a general image processing workflow combined with mineralogical analytical methods is presented by using contact-free hyperspectral imaging techniques on a mudstone concretion. The application of spectral algorithms reveals a distinct texture in a visually homogeneous black rock. The pattern is confirmed by optical and electron microscopy as well as X-ray diffraction, showing a layered texture of varying amounts of siderite and clay minerals. The rapid and contact-free visualisation of rock anisotropies such as mineralogical heterogeneities in overall homogeneous rocks may thus enable a better prediction of mechanical and petrophysical heterogeneities on mm- to 100 m scale.
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Document Type: Research Article
Publication date: 01 November 2017
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- Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (ZDGG) is an international peer reviewed journal that accepts papers on research and applied topics in the Earth Sciences. It is published online and in print. One volume, consisting of four issues is published annually. The journal is continously published by the German Geological Society since its foundation in 1848. It was relaunched in 2005.
ZDGG invites the submission of English, German and French language papers from all fields of geology, hydrogeology, paleontology, tectonics, sedimentology, engineering geology and of course environmental geology to name a few. The editors of ZDGG also invite suggestions for thematic issues.
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