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High-resolution Multicomponent Hardrock Seismic Imaging of Mineral Deposits and their Host Rock Structures
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Boliden Mineral AB.
Geological Survey of Sweden.
Show others and affiliations
2014 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Although applied in the past, there are only a few cases demonstrating the advantages of multicomponentseismic data for mineral exploration. To illustrate this, a test survey using sixty 3C-digital sensors, spacedbetween 2 to 4 m and assembled in a 160 m long landstreamer, was carried out to provide information onshallow structures hosting mineralization and also a magnetic lineament with an unknown origin. Thesurvey, totally about 1.3 km long, was complemented by Radio MagnetoTelluric (RMT) measurements.Although an explosive source was used to generate the seismic signal, the seismic data show good qualityfor all the three components. Supported by the RMT results, clear reflections are observed in thehorizontal component data at about 25 m depth, one of them steeply dipping, likely associated with themagnetic lineament. Field static corrections were well estimated thanks to the close shot and receiverspacing and the broadband frequency content of the data. This study demonstrates that multicomponentseismic data can be useful for providing information on shallow structures and linking them to the surfacegeology. The vertical component data, however, show deeper penetration and better image the crystallinebasement and its undulated/faulted surface at about 50 m depth.

Place, publisher, year, edition, pages
2014.
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-286572DOI: 10.3997/2214-4609.20140509OAI: oai:DiVA.org:uu-286572DiVA: diva2:921737
Conference
76th EAGE Conference & Exhibition 2014, 16-19 June 2014 Amsterdam RAI, The Netherlands
Available from: 2016-04-21 Created: 2016-04-21 Last updated: 2017-01-25Bibliographically approved

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Malehmir, AlirezaWang, ShunguoJuhlin, ChristopherDynesius, Lars

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