Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway.
The Kautokeino Greenstone Belt comprises a synclinorium of volcano-sedimentary rocks. This sequence of Early Proterozoic age is situated between two culminations of gneisses. Large areas of the belt have been mapped in detail (1:50.000) and petrophysical properties of about 1150 rock samples have be...
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ftnorgesgu:oai:openarchive.ngu.no:11250/2674249 2023-05-15T16:13:41+02:00 Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. Olesen, Odleiv Solli, Arne 1985 application/pdf https://hdl.handle.net/11250/2674249 eng eng NGU Bulletin (403) https://hdl.handle.net/11250/2674249 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 119-129 PETROFYSIKK MAGNETOMETRI GRAVIMETRI TOLKNING MODELLFORSØK Journal article 1985 ftnorgesgu 2022-07-03T15:27:08Z The Kautokeino Greenstone Belt comprises a synclinorium of volcano-sedimentary rocks. This sequence of Early Proterozoic age is situated between two culminations of gneisses. Large areas of the belt have been mapped in detail (1:50.000) and petrophysical properties of about 1150 rock samples have been measured. Geophysical interpretation based on aeromagnetic and gravimetric maps have been made. The aeromagnetic interpretation includes a magnetic dislocation map showing three directions of dislocation maxima (NNW, N, NE). From an inter- pretation of magnetic structures showing patterns, contacts and magnetization levels, the basement and intrusions can be separated from the supracrustals, primary layering in supracrustals can be seen, and the boundaries between rock units can be located. The gravity interpretation includes model calculations along four profiles. The profiles show alternating culminations and depressions within the greenstone belt with maximum depth up to 6 km. By combining a magnetic interpretation map and a gravity anomaly map a threedimensional analysis can be made. Anticlines and synclines in the greenstone belt emerge clearly on this map. It is concluded that most of the deformation is caused by gravitational tectonics. 36150 Article in Journal/Newspaper Finnmark Kautokeino North Norway Finnmark NGU Open Archive (Geological Survey of Norway) Kautokeino ENVELOPE(23.048,23.048,69.003,69.003) Norway |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
English |
topic |
PETROFYSIKK MAGNETOMETRI GRAVIMETRI TOLKNING MODELLFORSØK |
spellingShingle |
PETROFYSIKK MAGNETOMETRI GRAVIMETRI TOLKNING MODELLFORSØK Olesen, Odleiv Solli, Arne Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. |
topic_facet |
PETROFYSIKK MAGNETOMETRI GRAVIMETRI TOLKNING MODELLFORSØK |
description |
The Kautokeino Greenstone Belt comprises a synclinorium of volcano-sedimentary rocks. This sequence of Early Proterozoic age is situated between two culminations of gneisses. Large areas of the belt have been mapped in detail (1:50.000) and petrophysical properties of about 1150 rock samples have been measured. Geophysical interpretation based on aeromagnetic and gravimetric maps have been made. The aeromagnetic interpretation includes a magnetic dislocation map showing three directions of dislocation maxima (NNW, N, NE). From an inter- pretation of magnetic structures showing patterns, contacts and magnetization levels, the basement and intrusions can be separated from the supracrustals, primary layering in supracrustals can be seen, and the boundaries between rock units can be located. The gravity interpretation includes model calculations along four profiles. The profiles show alternating culminations and depressions within the greenstone belt with maximum depth up to 6 km. By combining a magnetic interpretation map and a gravity anomaly map a threedimensional analysis can be made. Anticlines and synclines in the greenstone belt emerge clearly on this map. It is concluded that most of the deformation is caused by gravitational tectonics. 36150 |
format |
Article in Journal/Newspaper |
author |
Olesen, Odleiv Solli, Arne |
author_facet |
Olesen, Odleiv Solli, Arne |
author_sort |
Olesen, Odleiv |
title |
Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. |
title_short |
Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. |
title_full |
Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. |
title_fullStr |
Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. |
title_full_unstemmed |
Geophysical and geological interpretation of regional structures within the Precambrian Kautokeino Greenstone Belt, Finnmark, North Norway. |
title_sort |
geophysical and geological interpretation of regional structures within the precambrian kautokeino greenstone belt, finnmark, north norway. |
publishDate |
1985 |
url |
https://hdl.handle.net/11250/2674249 |
long_lat |
ENVELOPE(23.048,23.048,69.003,69.003) |
geographic |
Kautokeino Norway |
geographic_facet |
Kautokeino Norway |
genre |
Finnmark Kautokeino North Norway Finnmark |
genre_facet |
Finnmark Kautokeino North Norway Finnmark |
op_source |
119-129 |
op_relation |
NGU Bulletin (403) https://hdl.handle.net/11250/2674249 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1765999514016022528 |