Articles | Volume 31
https://doi.org/10.5194/sd-31-85-2022
https://doi.org/10.5194/sd-31-85-2022
Technical development
 | 
28 Oct 2022
Technical development |  | 28 Oct 2022

Simple evaluation of the fold axis, axial plane, and interlimb angle from a borehole image log

Yohei Hamada, Yoshinori Sanada, and Takehiro Hirose

Related subject area

Location/Setting: Drilling technologies | Subject: Geology | Geoprocesses: Earth science methods
A channel sampling strategy for measurement of mineral modal and chemical composition of drill cores: application to lower oceanic crustal rocks from IODP Expedition 345 to the Hess Deep rift
Robert P. Wintsch, Romain Meyer, David L. Bish, Ryan T. Deasy, Toshio Nozaka, and Carley Johnson
Sci. Dril., 31, 71–84, https://doi.org/10.5194/sd-31-71-2022,https://doi.org/10.5194/sd-31-71-2022, 2022
Short summary

Cited articles

Alexander, J. I. D. and Watkinson, A. J.: Microfolding in the Permian Castile formation: An example of geometric systems in multilayer folding, Texas and New Mexico, Geol. Soc. Am. Bull., 101, 742–750, 1989. 
Blake, K. and Davatzes, N. C.: Borehole image log and statistical analysis of FOH-3D, Fallon Naval Air Station, NV Proceedings Thirty-Seven Stanford University Geothermal Workshop, 30 January–1 February 2012, Stanford, California, USA, https://pangea.stanford.edu/ERE/db/IGAstandard/record_detail.php?id=8231 (last access: 30 May 2022), 2012. 
Busk, H. G.: Earth flexures, Cambridge University Press, London, 106 pp., ISBN 9781107663190, 1929. 
Crow, H. L. and Ladevèze, P.: Downhole geophysical data collected in 11 boreholes near St-Édouard-de-Lotbinière, Québec, Geological Survey of Canada, Open File 7768, 48 pp., https://doi.org/10.4095/297047, 2015. 
Etchecopar, A. and Bonnetain, J. L.: Cross sections from Dipmeter Data 1, AAPG Bull., 76, 621–637, https://doi.org/10.1306/BDFF888A-1718-11D7-8645000102C1865D, 1992. 
Download
Short summary
Fold parameters such as fold axis, axial plane, interlimb angle, and their depth are very useful for geological and structural geological interpretation. In this paper, we report on a simple method to evaluate fold parameters from borehole image logs. The method is validated using a simulated fold model to test its practical limitations. The results suggest that the fold parameters derived by the proposed method are sufficient for practical interpretation.