Spatial and layer-controlled variability in fracture networks
Spatial and layer-controlled variability in fracture networks
Topological sampling, based on 1) node counting and 2) circular sampling areas, is used to measure fracture intensity in surface exposures of a layered limestone/shale sequence in north Somerset, UK. This method provides similar levels of precision as more traditional line samples, but is about 10 times quicker and allows characterization of the network topology. Georeferencing of photographs of the sample sites allows later analysis of trace lengths and orientations, and identification of joint set development.
ANOVA tests support a complex interaction of within-layer, between-layer and between-location variability in fracture intensity, with the different layers showing anomalous intensity at different locations. This variation is not simply due to bed thickness, nor can it be related to any obvious compositional or textural variation between the limestone beds. These results are used to assess approaches to the spatial mapping of fracture intensity.
52-65
Procter, Andrew
ca176638-819c-4930-b1da-067c85535fab
Sanderson, David J.
5653bc11-b905-4985-8c16-c655b2170ba9
March 2018
Procter, Andrew
ca176638-819c-4930-b1da-067c85535fab
Sanderson, David J.
5653bc11-b905-4985-8c16-c655b2170ba9
Procter, Andrew and Sanderson, David J.
(2018)
Spatial and layer-controlled variability in fracture networks.
Journal of Structural Geology, 108, .
(doi:10.1016/j.jsg.2017.07.008).
Abstract
Topological sampling, based on 1) node counting and 2) circular sampling areas, is used to measure fracture intensity in surface exposures of a layered limestone/shale sequence in north Somerset, UK. This method provides similar levels of precision as more traditional line samples, but is about 10 times quicker and allows characterization of the network topology. Georeferencing of photographs of the sample sites allows later analysis of trace lengths and orientations, and identification of joint set development.
ANOVA tests support a complex interaction of within-layer, between-layer and between-location variability in fracture intensity, with the different layers showing anomalous intensity at different locations. This variation is not simply due to bed thickness, nor can it be related to any obvious compositional or textural variation between the limestone beds. These results are used to assess approaches to the spatial mapping of fracture intensity.
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Procter_Sanderson_2017_JSG_final
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Accepted/In Press date: 17 July 2017
e-pub ahead of print date: 19 July 2017
Published date: March 2018
Identifiers
Local EPrints ID: 413830
URI: http://eprints.soton.ac.uk/id/eprint/413830
ISSN: 0191-8141
PURE UUID: 98e36fe8-82b0-4cbc-ab9f-64602d7741de
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Date deposited: 07 Sep 2017 16:31
Last modified: 16 Mar 2024 05:42
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Author:
Andrew Procter
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