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Deep Targeting an Iron-Oxide Ore Body Using a Seismic Landstreamer and a 500-Kg Drop Hammer Source
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics. (Applied Geophysics)ORCID iD: 0000-0003-1241-2988
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics. (Applied Geophysics)
Nordic Iron Ore AB.
Nordic Iron Ore AB.
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2017 (English)Conference paper, (Refereed)
Abstract [en]

In a pilot study, a known down to ca. 850 m deep mineralized iron-oxide zone was targeted in the historical Blötberget-Ludvika mining area of central Sweden using a MEMS-based, 240 m long, comprising of 100 sensors landstreamer (2-4 m spacing) and combined with 74 wireless recorders (mixed 10 Hz and MEMs, 10 m spacing). A Bobcat-mounted drop hammer, 500 kg, was used to generate the seismic signal. Within 4 days, about 3.5 km of seismic data using 2-10 m source and receiver spacing were acquired. At each source location 3 records were made and stacked vertically to improve the signal-to-noise ratio. The streamer moved 9 times, each time 200 m forward, and wireless recorders were kept at both ends of the profile, moved once, to provide long offsets in the data. While in a swampy and challenging near-surface environment, reflection data processing results clearly image the mineralization as a set of strong high amplitude reflections and likely slightly extending beyond the known depth. This is encouraging and suggests such a cost-effective exploration method can be used in the area to delineate deep deposits and their depth and lateral extents.  

Place, publisher, year, edition, pages
2017.
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-326271DOI: 10.3997/2214-4609.201701416OAI: oai:DiVA.org:uu-326271DiVA: diva2:1119737
Conference
79th EAGE Conference and Exhibition 2017
Projects
ERAMIN1-StartGeoDelineation
Funder
VINNOVA, 2014-06238
Available from: 2017-07-04 Created: 2017-07-04 Last updated: 2017-07-11Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • ieee
  • modern-language-association
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  • de-DE
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