dc.contributor.author | Sandstad, Jan Sverre | |
dc.contributor.author | Olesen, Odleiv | |
dc.date.accessioned | 2020-08-26T09:13:16Z | |
dc.date.available | 2020-08-26T09:13:16Z | |
dc.date.issued | 1993 | |
dc.identifier.uri | https://hdl.handle.net/11250/2674279 | |
dc.description.abstract | Processed 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.iso | eng | |
dc.relation.ispartofseries | NGU Bulletin (425) | |
dc.rights | Navngivelse 4.0 Internasjonal | |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | |
dc.subject | PETROFYSIKK | |
dc.subject | PREKAMBRIUM | |
dc.subject | FORKASTNING | |
dc.subject | BERGGRUNNSGEOLOGI | |
dc.subject | GRAVIMETRI | |
dc.subject | MAGNETOMETRI | |
dc.subject | ELEKTROMAGNETISK MÅLING | |
dc.title | Interpretation of the Proterozoic Kautokeino Greenstone Belt, Finnmark, Norway from combined geophysical and geological data. | |
dc.type | Journal article | |
dc.description.localcode | 35883 | |
dc.source.pagenumber | 43-62 | |