Journal
GEOPHYSICAL PROSPECTING
Volume 68, Issue 1, Pages 7-23Publisher
WILEY
DOI: 10.1111/1365-2478.12855
Keywords
Seismic; Data processing; Imaging
Categories
Funding
- Vinnova
- SGU
- Tekes
- Nordic Iron Ore (NIO)
- Yara
- European Union's Horizon 2020 research and innovation programme [775971]
- Smart Exploration project
- H2020 Societal Challenges Programme [775971] Funding Source: H2020 Societal Challenges Programme
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Reflection seismic data were acquired within two field campaigns in the Blotberget, Ludvika mining area of central Sweden, for deep imaging of iron-oxide mineralization that were known to extend down to 800-850 m depth. The two surveys conducted in years 2015 and 2016, one employing a seismic landstreamer and geophones connected to wireless recorders, and another one using cabled geophones and wireless recorders, aimed to delineate the geometry and depth extent of the iron-oxide mineralization for when mining commences in the area. Even with minimal and conventional processing approaches, the merged datasets provide encouraging information about the depth continuation of the mineralized horizons and the geological setting of the study area. Multiple sets of strong reflections represent a possible continuation of the known deposits that extend approximately 300 m further down-dip than the known 850 m depth obtained from historical drilling. They show excellent correlation in shape and strength with those of the Blotberget deposits. Furthermore, several reflections in the footwall of the known mineralization can potentially be additional resources underlying the known ones. The results from these seismic surveys are encouraging for mineral exploration purposes given the good quality of the final section and fast seismic surveys employing a simple cost-effective and easily available impact-type seismic source.
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