Articles | Volume 11, issue 6
Solid Earth, 11, 2119–2140, 2020
https://doi.org/10.5194/se-11-2119-2020

Special issue: Faults, fractures, and fluid flow in the shallow crust

Solid Earth, 11, 2119–2140, 2020
https://doi.org/10.5194/se-11-2119-2020

Research article 18 Nov 2020

Research article | 18 Nov 2020

The growth of faults and fracture networks in a mechanically evolving, mechanically stratified rock mass: a case study from Spireslack Surface Coal Mine, Scotland

Billy James Andrews et al.

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Latest update: 23 Sep 2021
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Short summary
Through geological mapping we find that fault zone internal structure depends on whether or not the fault cuts multiple lithologies, the presence of shale layers, and the orientation of joints and coal cleats at the time of faulting. During faulting, cementation of fractures (i.e. vein formation) is highest where the fractures are most connected. This leads to the counter-intuitive result that the highest-fracture-density part of the network often has the lowest open-fracture connectivity.