Journal cover Journal topic
Solid Earth An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 2.380 IF 2.380
  • IF 5-year value: 3.147 IF 5-year
    3.147
  • CiteScore value: 3.06 CiteScore
    3.06
  • SNIP value: 1.335 SNIP 1.335
  • IPP value: 2.81 IPP 2.81
  • SJR value: 0.779 SJR 0.779
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 32 Scimago H
    index 32
  • h5-index value: 31 h5-index 31
Discussion papers
https://doi.org/10.5194/se-2019-171
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-2019-171
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 02 Dec 2019

Submitted as: research article | 02 Dec 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Solid Earth (SE).

Throw variations and strain partitioning associated with fault-bend folding along normal faults

Efstratios Delogkos1, Muhammad Mudasar Saqab1,2, John J. Walsh1, Vincent Roche1, and Conrad Childs1 Efstratios Delogkos et al.
  • 1Fault Analysis Group and iCRAG (Irish Centre for Research in Applied Geosciences), UCD School of Earth Sciences, University College Dublin, Belfield, Dublin 4, Ireland
  • 2Norwegian Geotechnical Institute, 40 St Georges Terrace, Perth WA 6000, Australia

Abstract. Normal faults have irregular geometries on a range of scales arising from different processes including refraction and segmentation. A fault with an average dip and constant displacement on a large-scale, will have irregular geometries on smaller scales, the presence of which will generate fault-related folds, with major implications for across-fault throw variations. A quantitative model has been presented which illustrates the range of deformation arising from movement on fault surface irregularities, with fault-bend folding generating geometries reminiscent of normal drag and reverse drag. The model highlights how along-fault displacements are partitioned between continuous (i.e. folding) and discontinuous (i.e. discrete displacement) strain along fault bends characterised by the full range of fault dip changes. Strain partitioning has a profound effect on measured throw values across faults, if account is not taken of the continuous strains accommodated by folding and bed rotations. We show that fault throw can be subject to errors of up to ca. 50 % for realistic fault bend geometries (up to ca. 40°), even on otherwise sub-planar faults with constant displacement. This effect will provide apparently more irregular variations in throw and bed geometries that must be accounted for in associated kinematic interpretations.

Efstratios Delogkos et al.
Interactive discussion
Status: open (until 27 Feb 2020)
Status: open (until 27 Feb 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Efstratios Delogkos et al.
Efstratios Delogkos et al.
Viewed  
Total article views: 162 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
128 33 1 162 3 2
  • HTML: 128
  • PDF: 33
  • XML: 1
  • Total: 162
  • BibTeX: 3
  • EndNote: 2
Views and downloads (calculated since 02 Dec 2019)
Cumulative views and downloads (calculated since 02 Dec 2019)
Viewed (geographical distribution)  
Total article views: 103 (including HTML, PDF, and XML) Thereof 101 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 23 Jan 2020
Publications Copernicus
Download
Short summary
Normal faults have irregular geometries on a range of scales. A quantitative model has been presented which illustrates the range of deformation arising from movement on fault surface irregularities, with fault-bend folding generating geometries reminiscent of normal drag and reverse drag. We show that fault throw can be subject to errors of up to ca. 50 % for realistic fault bend geometries (up to ca. 40°), even on otherwise sub-planar faults with constant displacement.
Normal faults have irregular geometries on a range of scales. A quantitative model has been...
Citation