Imaging sediment structure: the emerging use of Magnetic Resonance Imaging (MRI) for 3D analysis of sediment structures and internal flow processes

Haynes, H. and Holmes, W.M. (2012) Imaging sediment structure: the emerging use of Magnetic Resonance Imaging (MRI) for 3D analysis of sediment structures and internal flow processes. In: Clarke, L.E. (ed.) Geomorphological Techniques. British Society for Geomorphology: London.

Abstract

Magnetic Resonance Imaging (MRI) can be used for 3D analysis of small-scale porous media structure and internal flow-related processes. It offers notable advantages over traditional sediment sampling (e.g. cores or surface-based scanning) as it is capable of high spatio-temporal resolution of the full 3D volume, including the sub-surface. Similarly, compared to X-Ray tomography, the extensive catalogue of MR pulse sequences typically provides: faster capture for imaging dynamic fluid processes; greater flexibility in resolving chemical species or tracers; and a safer radiation-free methodology. To demonstrate the relevance of this technique in geomorphological research, three exemplar applications are described: porous media structure of gravel bed rivers; measurements of fluid processes within aquifer pores and fractures; and, concentration mapping of contaminants through sand/gravel frameworks. Whilst, this emerging technique offers significant potential for visualizing many other ‘black-box’ processes important to the wider discipline, attention is afforded to discussion of the present constraints of the technique in field-based analysis.

• Item Type: Book Sections
• Additional Information: Online Edition. ISSN: 2046-0371
• Status: Published
• Glasgow Author(s) Enlighten ID: Holmes, Dr William
• Authors: Haynes, H., and Holmes, W.M.
• Subjects: Q Science > QC Physics; Q Science > QE Geology; T Technology > TA Engineering (General). Civil engineering (General)
• College/School: College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
• Publisher: British Society for Geomorphology
• Copyright Holders: Copyright © 2012 British Society for Geomorphology.
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher