Preprints
https://doi.org/10.5194/se-2021-42
https://doi.org/10.5194/se-2021-42

  16 Apr 2021

16 Apr 2021

Review status: a revised version of this preprint is currently under review for the journal SE.

Establishing an integrated workflow identifying and linking surface and subsurface lineaments for mineral exploration under cover: Example from the Gawler Craton, South Australia

Ulrich Kelka1, Cericia Martinez1, Carmen Krapf2, Stefan Westerlund1, Ignacio Gonzalez-Alvarez3,4, Mark Pawley2, and Clive Foss1 Ulrich Kelka et al.
  • 1CSIRO - Deep Earth Imaging Future Science Platform, Australia
  • 2Geological Survey of South Australia, Department for Energy and Mining, Australia
  • 3CSIRO - Mineral Resources, Discovery Program, Australia
  • 4University of Western Australia, Centre for Exploration Targeting, Perth, Australia

Abstract. Mineral exploration in areas comprising thick and complex cover represents an intrinsic challenge in Australia. Cost and time efficient methods that help to narrow down exploration areas are therefore of particular interest to the Australian mining industry and for mineral exploration world wide. Based on a case study around the Tarcoola gold mine in the regolith dominated South Australian Central Gawler Craton we suggest an exploration targeting workflow based on the joint analysis of surface and subsurface lineaments. The datasets utilized in this study are a digital elevation model and radiometrics that represent surface signals and total magnetic intensity and gravity attributed to subsurface signals.

We compare automatically and manually mapped lineament sets derived from remotely sensed data. In order to establish an integrated concept for exploration through cover based on the best suited lineament data, we will point out the most striking differences between the automatically and manually detected lineaments and compare the datasets that represent surficial in contrast to subsurface structures. After determining which mapping technique is best suited for preliminary exploration in regolith dominated areas, such as the Central Gawler Craton, we will show how merging surface and subsurface lineament data may prove useful for mapping prospective areas. We propose that target areas are represented by areas of high lineament densities that are adjacent to regions comprising high density of intersections.

Ulrich Kelka et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on se-2021-42', Anonymous Referee #1, 08 May 2021
  • RC2: 'Comment on se-2021-42', Anonymous Referee #2, 28 May 2021
  • EC1: 'Comment on se-2021-42 from editor', Alba Gil de la Iglesia, 30 May 2021

Ulrich Kelka et al.

Ulrich Kelka et al.

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Short summary
The insights of this study will help to better understand how to identify basement linear structures and how these lineaments could be related to surface lineaments or geology in the context of the Central Gawler Craton, and to provide better targeting of surface areas to detect subsurface mineral systems in this region.