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Aliyu, MM, Murphy, W orcid.org/0000-0002-7392-1527, Lawrence, JA et al. (1 more author) (2017) Engineering geological characterization of flints. Quarterly Journal of Engineering Geology and Hydrogeology, 50 (2). pp. 133-147. ISSN 1470-9236
Abstract
The petrographic and mechanical properties of flints from the Burnham (North Landing, Yorkshire, UK), Seaford (East Sussex, UK, and Dieppe, France), and Lewes Nodular (Mesnil-Val, France) Chalk formations have been investigated. Microtexture and mineral composition of flints are studied to understand how the geological and petrophysical properties of the flint affect drilling responses to the rock and investigate any spatial variation. The flints are categorized based on physical observation into white crust and light brownish grey, dark brownish grey and grey flints. Scanning electron microscopy shows textural variation in the classes. The white crust, light brownish grey, brownish grey and grey flints from the Burnham Chalk Formation from North Landing contain more calcite and have coarser, more poorly cemented silica spherules in comparison with similar classes of flint from the Seaford and Lewes Chalk formations from the Anglo-Paris Basin. In these latter flints, the structure is dominated by massive quartz cement with trace calcite independent of location. Strength tests show that the grey flints from North Landing are weaker than equivalents from the Anglo-Paris Basin. It is suggested that variation in engineering properties between grey and the dark brownish grey flints is caused by mineral composition, microtexture, structure and the local or site geology of flint materials.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Author(s). Published by The Geological Society of London. This is an author produced version of a paper published in Quarterly Journal of Engineering Geology and Hydrogeology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Engineering; Flint; Chalk; mechanical; properties; Mineralogy; Microstructure |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 24 Jan 2017 11:02 |
Last Modified: | 16 Jul 2018 12:35 |
Status: | Published |
Publisher: | Geological Society |
Identification Number: | 10.1144/qjegh2015-044 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:111092 |
Available Versions of this Item
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Engineering geological classification of flints. (deposited 20 Apr 2017 08:54)
- Engineering geological characterization of flints. (deposited 24 Jan 2017 11:02) [Currently Displayed]