Localised Deformation of Weakly Cemented Sands: A Case Study

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

Deformation band occurrence in cemented granular materials is intimately related to grain and cement properties. In this work we focus on a Cretaceous sand deposit (France), in which numerous deformation bands have been locally observed. Material from this deposit is used to fabricate artificially cemented samples at the laboratory scale. We principally use two experimental techniques to visualise the inner structure of the natural and artificial samples and comment on the deformation processes: the Scanning Electron Microscopy (SEM) and the X-Ray Computed Tomography (XRCT). So far, microstructural observations on the material far from the deformation bands have revealed that the medium-sized sand grains are held together by weak menisci bonds made of clays. Inside one deformation band we have discovered, instead, sand grains cemented with clays and syntaxial quartz overgrowths. We argue that grain fragmentation in the deformation band is the main silica source for quartz precipitation. The syntaxial overgrowths formation, however, is still weakly justified by the geological reconstructed pressure and temperature conditions within the sand depositional area. Furthermore, in the clay cement we have identified quartz micro-fragments, derived probably from the mentioned grain breakage, and micro-quartz, which may have generated from the interaction between free silica and clay in the pore space.
LanguageEnglish
Title of host publicationBifurcation and Degradation of Geomaterials with Engineering Applications
EditorsE. Papamichos, P. Papanastasiou, E. Pasternak, A. Dyskin
PublisherSpringer
Pages381-389
Number of pages9
ISBN (Electronic)9783319563978
ISBN (Print)9783319563961
DOIs
Publication statusPublished - 2017

Publication series

NameSpringer Series in Geomechanics and Geoengineering
PublisherSpringer
ISSN (Print)1866-8755

Fingerprint

sand
quartz
clay
cement
silica
breakage
pore space
tomography
fragmentation
scanning electron microscopy
Cretaceous
material
temperature

Cite this

Soriano, I., Charalampidou, E-M. C., Lewis, H., Viggiani, G., Buckman, J., & Couples, G. D. (2017). Localised Deformation of Weakly Cemented Sands: A Case Study. In E. Papamichos, P. Papanastasiou, E. Pasternak, & A. Dyskin (Eds.), Bifurcation and Degradation of Geomaterials with Engineering Applications (pp. 381-389). (Springer Series in Geomechanics and Geoengineering). Springer. https://doi.org/10.1007/978-3-319-56397-8_47
Soriano, Ilaria ; Charalampidou, Elli-Maria Christodoulos ; Lewis, Helen ; Viggiani, Gioacchino ; Buckman, Jim ; Couples, Gary Douglas. / Localised Deformation of Weakly Cemented Sands : A Case Study. Bifurcation and Degradation of Geomaterials with Engineering Applications. editor / E. Papamichos ; P. Papanastasiou ; E. Pasternak ; A. Dyskin. Springer, 2017. pp. 381-389 (Springer Series in Geomechanics and Geoengineering).
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abstract = "Deformation band occurrence in cemented granular materials is intimately related to grain and cement properties. In this work we focus on a Cretaceous sand deposit (France), in which numerous deformation bands have been locally observed. Material from this deposit is used to fabricate artificially cemented samples at the laboratory scale. We principally use two experimental techniques to visualise the inner structure of the natural and artificial samples and comment on the deformation processes: the Scanning Electron Microscopy (SEM) and the X-Ray Computed Tomography (XRCT). So far, microstructural observations on the material far from the deformation bands have revealed that the medium-sized sand grains are held together by weak menisci bonds made of clays. Inside one deformation band we have discovered, instead, sand grains cemented with clays and syntaxial quartz overgrowths. We argue that grain fragmentation in the deformation band is the main silica source for quartz precipitation. The syntaxial overgrowths formation, however, is still weakly justified by the geological reconstructed pressure and temperature conditions within the sand depositional area. Furthermore, in the clay cement we have identified quartz micro-fragments, derived probably from the mentioned grain breakage, and micro-quartz, which may have generated from the interaction between free silica and clay in the pore space.",
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Soriano, I, Charalampidou, E-MC, Lewis, H, Viggiani, G, Buckman, J & Couples, GD 2017, Localised Deformation of Weakly Cemented Sands: A Case Study. in E Papamichos, P Papanastasiou, E Pasternak & A Dyskin (eds), Bifurcation and Degradation of Geomaterials with Engineering Applications. Springer Series in Geomechanics and Geoengineering, Springer, pp. 381-389. https://doi.org/10.1007/978-3-319-56397-8_47

Localised Deformation of Weakly Cemented Sands : A Case Study. / Soriano, Ilaria; Charalampidou, Elli-Maria Christodoulos; Lewis, Helen; Viggiani, Gioacchino; Buckman, Jim; Couples, Gary Douglas.

Bifurcation and Degradation of Geomaterials with Engineering Applications. ed. / E. Papamichos; P. Papanastasiou; E. Pasternak; A. Dyskin. Springer, 2017. p. 381-389 (Springer Series in Geomechanics and Geoengineering).

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

TY - CHAP

T1 - Localised Deformation of Weakly Cemented Sands

T2 - A Case Study

AU - Soriano, Ilaria

AU - Charalampidou, Elli-Maria Christodoulos

AU - Lewis, Helen

AU - Viggiani, Gioacchino

AU - Buckman, Jim

AU - Couples, Gary Douglas

PY - 2017

Y1 - 2017

N2 - Deformation band occurrence in cemented granular materials is intimately related to grain and cement properties. In this work we focus on a Cretaceous sand deposit (France), in which numerous deformation bands have been locally observed. Material from this deposit is used to fabricate artificially cemented samples at the laboratory scale. We principally use two experimental techniques to visualise the inner structure of the natural and artificial samples and comment on the deformation processes: the Scanning Electron Microscopy (SEM) and the X-Ray Computed Tomography (XRCT). So far, microstructural observations on the material far from the deformation bands have revealed that the medium-sized sand grains are held together by weak menisci bonds made of clays. Inside one deformation band we have discovered, instead, sand grains cemented with clays and syntaxial quartz overgrowths. We argue that grain fragmentation in the deformation band is the main silica source for quartz precipitation. The syntaxial overgrowths formation, however, is still weakly justified by the geological reconstructed pressure and temperature conditions within the sand depositional area. Furthermore, in the clay cement we have identified quartz micro-fragments, derived probably from the mentioned grain breakage, and micro-quartz, which may have generated from the interaction between free silica and clay in the pore space.

AB - Deformation band occurrence in cemented granular materials is intimately related to grain and cement properties. In this work we focus on a Cretaceous sand deposit (France), in which numerous deformation bands have been locally observed. Material from this deposit is used to fabricate artificially cemented samples at the laboratory scale. We principally use two experimental techniques to visualise the inner structure of the natural and artificial samples and comment on the deformation processes: the Scanning Electron Microscopy (SEM) and the X-Ray Computed Tomography (XRCT). So far, microstructural observations on the material far from the deformation bands have revealed that the medium-sized sand grains are held together by weak menisci bonds made of clays. Inside one deformation band we have discovered, instead, sand grains cemented with clays and syntaxial quartz overgrowths. We argue that grain fragmentation in the deformation band is the main silica source for quartz precipitation. The syntaxial overgrowths formation, however, is still weakly justified by the geological reconstructed pressure and temperature conditions within the sand depositional area. Furthermore, in the clay cement we have identified quartz micro-fragments, derived probably from the mentioned grain breakage, and micro-quartz, which may have generated from the interaction between free silica and clay in the pore space.

U2 - 10.1007/978-3-319-56397-8_47

DO - 10.1007/978-3-319-56397-8_47

M3 - Chapter (peer-reviewed)

SN - 9783319563961

T3 - Springer Series in Geomechanics and Geoengineering

SP - 381

EP - 389

BT - Bifurcation and Degradation of Geomaterials with Engineering Applications

A2 - Papamichos, E.

A2 - Papanastasiou, P.

A2 - Pasternak, E.

A2 - Dyskin, A.

PB - Springer

ER -

Soriano I, Charalampidou E-MC, Lewis H, Viggiani G, Buckman J, Couples GD. Localised Deformation of Weakly Cemented Sands: A Case Study. In Papamichos E, Papanastasiou P, Pasternak E, Dyskin A, editors, Bifurcation and Degradation of Geomaterials with Engineering Applications. Springer. 2017. p. 381-389. (Springer Series in Geomechanics and Geoengineering). https://doi.org/10.1007/978-3-319-56397-8_47