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dc.contributor.authorSandstad, Jan Sverre
dc.contributor.authorOlesen, Odleiv
dc.date.accessioned2020-08-26T09:13:16Z
dc.date.available2020-08-26T09:13:16Z
dc.date.issued1993
dc.identifier.urihttps://hdl.handle.net/11250/2674279
dc.description.abstractProcessed images of aeromagnetic, gravimetric and topographical data and geological maps combined with EM helicopter measurements, petrophysical data and digitised geological field observations have been used in a geological interpretation and structural analysis of the Kautokeino Greenstone Belt, KGB. The data were analysed with an image-processing system (geophysical data) and a geographic information system (geological data and interpretations).The bulk of the mafic volcanic rocks in the Kautokeino Greenstone Belt is situated within a NNW-SSE-trending, 35 km wide and up to 5-6 km deep trough which is thought to represent and Early Proterozoic rift deformed by strike-slip faulting along the Bothnian-Kvænangen Fault Complex,BKFC. The margins of the Alta-Kautokeino Rift, AKR, can be outlined from the geophysical data. The Ciegnaljåkka-Boaganjavri Lineament and the Soadnjujavri-Bejasjavri Fault are the main bordering fault zones and arc continuous along the entire greenstone belt. The supracrustals between these two zones are continuous to great depth (5-6 km) and the contracts along these bordering zones are steeply dipping. Gravity interpretations show that the outer amphibolite-facies rocks are just as deep as the central greenschist-facies unit. Results of the present study suggest that the amphibolite-facies volcano-sedimentary rocks situated along the flanks of the KGB should also be included in the rift.
dc.language.isoeng
dc.relation.ispartofseriesNGU Bulletin (425)
dc.rightsNavngivelse 4.0 Internasjonal
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no
dc.subjectPETROFYSIKK
dc.subjectPREKAMBRIUM
dc.subjectFORKASTNING
dc.subjectBERGGRUNNSGEOLOGI
dc.subjectGRAVIMETRI
dc.subjectMAGNETOMETRI
dc.subjectELEKTROMAGNETISK MÅLING
dc.titleInterpretation of the Proterozoic Kautokeino Greenstone Belt, Finnmark, Norway from combined geophysical and geological data.
dc.typeJournal article
dc.description.localcode35883
dc.source.pagenumber43-62


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