Preprints
https://doi.org/10.5194/egusphere-2022-255
https://doi.org/10.5194/egusphere-2022-255
 
27 Apr 2022
27 Apr 2022

Multiscale lineament analysis and permeability heterogeneity of fractured crystalline basement blocks

Alberto Ceccato1,a, Giulia Tartaglia1, Marco Antonellini1, and Giulio Viola1 Alberto Ceccato et al.
  • 1Dipartimento di Scienze Biologiche, Geologiche ed Ambientali – BiGeA, Alma Mater Studiorum – Università di Bologna – via Zamboni, 67, 40126 Bologna, Italy
  • apresent address: Geological Institute, Department of Earth Sciences, ETH Zurich, Sonneggstrasse 5, 8092 Zurich, Switzerland

Abstract. The multiscale analysis of fracture patterns helps defining the geometric scaling laws and the relationships between outcrop- and regional-scale structures in a fracture network. Here, we present a novel analytical and statistical workflow to analyze the geometrical and spatial organization properties of the Rolvsnes granodiorite lineament (fracture) network in the crystalline basement of southwestern Norway (Bømlo Island). The network shows a scale-invariant spatial distribution described by a fractal dimension D ≈ 1.51, with lineament lengths distributed following a general scaling power-law (exponent   = 1.88). However, orientation-dependent analyses show that the identified sets vary their relative abundance and spatial organization with scale, defining a hierarchical network. Lineament length, density, and intensity distributions of each set follow power-law scaling laws characterized by their own exponents. Thus, our multiscale, orientation-dependent statistical approach can aid in the identification of the hierarchical structure of the fracture network, quantifying the spatial heterogeneity of lineament sets and their related regional- vs. local-scale relevance. These results, integrated with field petrophysical analyses of fracture lineaments, can effectively improve the detail and accuracy of permeability prediction of heterogeneously fractured media. Our results show also how the geological and geometrical properties of the fracture network and analytical biases affect the results of multiscale analyses and how they must be critically assessed before extrapolating the conclusions to any other similar case study of fractured crystalline basement blocks.

Journal article(s) based on this preprint

09 Sep 2022
Multiscale lineament analysis and permeability heterogeneity of fractured crystalline basement blocks
Alberto Ceccato, Giulia Tartaglia, Marco Antonellini, and Giulio Viola
Solid Earth, 13, 1431–1453, https://doi.org/10.5194/se-13-1431-2022,https://doi.org/10.5194/se-13-1431-2022, 2022
Short summary

Alberto Ceccato et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-255', Anonymous Referee #1, 04 Jun 2022
    • AC1: 'Reply on RC1', Alberto Ceccato, 11 Jul 2022
  • RC2: 'Comment on egusphere-2022-255', Anonymous Referee #2, 29 Jun 2022
    • AC2: 'Reply on RC2', Alberto Ceccato, 11 Jul 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-255', Anonymous Referee #1, 04 Jun 2022
    • AC1: 'Reply on RC1', Alberto Ceccato, 11 Jul 2022
  • RC2: 'Comment on egusphere-2022-255', Anonymous Referee #2, 29 Jun 2022
    • AC2: 'Reply on RC2', Alberto Ceccato, 11 Jul 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
AR by Alberto Ceccato on behalf of the Authors (11 Jul 2022)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (11 Jul 2022) by Stefano Tavani
RR by Anonymous Referee #1 (04 Aug 2022)
ED: Publish subject to minor revisions (review by editor) (04 Aug 2022) by Stefano Tavani
AR by Alberto Ceccato on behalf of the Authors (04 Aug 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish as is (04 Aug 2022) by Stefano Tavani
ED: Publish as is (04 Aug 2022) by Federico Rossetti(Executive Editor)
AR by Alberto Ceccato on behalf of the Authors (18 Aug 2022)  Author's response    Manuscript

Journal article(s) based on this preprint

09 Sep 2022
Multiscale lineament analysis and permeability heterogeneity of fractured crystalline basement blocks
Alberto Ceccato, Giulia Tartaglia, Marco Antonellini, and Giulio Viola
Solid Earth, 13, 1431–1453, https://doi.org/10.5194/se-13-1431-2022,https://doi.org/10.5194/se-13-1431-2022, 2022
Short summary

Alberto Ceccato et al.

Data sets

Multiscale_lineament_analyses_dataset Alberto Ceccato https://data.mendeley.com/datasets/4zdjpmr9jk/1

Alberto Ceccato et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The Earth's surface is commonly characterized by the occurrence of fractures, which can be mapped and their geometry quantified, on digital representations of the surface at different scales of observation. Here we present a series of analytical and statistical tools, which can aid the quantification of fracture spatial distribution at different scale. In doing so, we can improve our understanding of how fracture geometry and geology affect fluid flow within the fractured Earth crust.