Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway
Two snow-streamer profiles were acquired by the University of Bergen in March and April 2012within the programme \u2018Mineral Resources in Northern Norway - MINN\u2019. The two profiles arelocated in the Masi and Sennlandet areas in the Kautokeino and Hammerfest municipalities. Thedata were acquire...
Main Authors: | , , , |
---|---|
Format: | Report |
Language: | English |
Published: |
Norges geologiske undersøkelse
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2753549 |
id |
ftnorgesgu:oai:openarchive.ngu.no:11250/2753549 |
---|---|
record_format |
openpolar |
spelling |
ftnorgesgu:oai:openarchive.ngu.no:11250/2753549 2023-05-15T15:14:30+02:00 Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway Ruud, Bent Ole Olesen, Odleiv Gellein, Jomar Gellein Johansen, Tor Arne HAMMERFEST 29353: 19354 19352 19334 18331 KAUTOKEINO 2021 application/pdf https://hdl.handle.net/11250/2753549 eng eng Norges geologiske undersøkelse NGU-Rapport (2021.004) 347100 urn:issn:0800-3416 https://hdl.handle.net/11250/2753549 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 35 s. GEOFYSIKK GEOLOGI SEISMIKK Report 2021 ftnorgesgu 2022-07-03T15:27:07Z Two snow-streamer profiles were acquired by the University of Bergen in March and April 2012within the programme \u2018Mineral Resources in Northern Norway - MINN\u2019. The two profiles arelocated in the Masi and Sennlandet areas in the Kautokeino and Hammerfest municipalities. Thedata were acquired using a combination of snow-streamer and autonomous nodes. The obtainedreflectors can be traced to a depth of 4-5 km. P-wave velocities are obtained from travel-timetomography of manually picked first breaks. The velocities can be resolved down to a fewhundred meters depth.We have included two interpretation examples of the Masi profile in the current acquisition andprocessing report. The regional c. 4-5 km wide Mieroj\u00E1vri-Sværholt shear zone is represented byseveral reflectors dipping at an angle of c. 40-50\u00B0 to the southeast below the northwestern marginof the Jergul Gneiss Complex. The migrated seismic profile shows that the dip of the western andeastern segments of the Masi fault system (within the Stuoragurra fault complex) is 52\u00B0 and 65\u00B0,respectively. The two postglacial fault segments seem to merge at a depth of c. 500 m.The present study proves that snow-streamer technology is an efficient way to carry out seismicprofiling in snow-covered and relatively flat terrain. Using detonating cord as a seismic sourcehas left no permanent footprint on the sparse vegetation in the Arctic, which is an advantage. Weconclude that the reflection seismic data are of high quality and that the obtained reflectors canbe interpreted in terms of regional geological structures continuing to a depth of 3-4 km. Wesuggest that the western part of the reprocessed Masi profile, and the Sennalandet profile,should be interpreted in a similar integrated way as the examples shown in the present report. 67206 Report Arctic Finnmark Hammerfest Kautokeino Masi Northern Norway Sennalandet Finnmark NGU Open Archive (Geological Survey of Norway) Arctic Bergen Jergul ENVELOPE(24.652,24.652,69.402,69.402) Kautokeino ENVELOPE(23.048,23.048,69.003,69.003) Masi ENVELOPE(23.666,23.666,69.444,69.444) Norway Stuoragurra ENVELOPE(23.402,23.402,69.359,69.359) Sværholt ENVELOPE(26.684,26.684,70.962,70.962) |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
English |
topic |
GEOFYSIKK GEOLOGI SEISMIKK |
spellingShingle |
GEOFYSIKK GEOLOGI SEISMIKK Ruud, Bent Ole Olesen, Odleiv Gellein, Jomar Gellein Johansen, Tor Arne Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway |
topic_facet |
GEOFYSIKK GEOLOGI SEISMIKK |
description |
Two snow-streamer profiles were acquired by the University of Bergen in March and April 2012within the programme \u2018Mineral Resources in Northern Norway - MINN\u2019. The two profiles arelocated in the Masi and Sennlandet areas in the Kautokeino and Hammerfest municipalities. Thedata were acquired using a combination of snow-streamer and autonomous nodes. The obtainedreflectors can be traced to a depth of 4-5 km. P-wave velocities are obtained from travel-timetomography of manually picked first breaks. The velocities can be resolved down to a fewhundred meters depth.We have included two interpretation examples of the Masi profile in the current acquisition andprocessing report. The regional c. 4-5 km wide Mieroj\u00E1vri-Sværholt shear zone is represented byseveral reflectors dipping at an angle of c. 40-50\u00B0 to the southeast below the northwestern marginof the Jergul Gneiss Complex. The migrated seismic profile shows that the dip of the western andeastern segments of the Masi fault system (within the Stuoragurra fault complex) is 52\u00B0 and 65\u00B0,respectively. The two postglacial fault segments seem to merge at a depth of c. 500 m.The present study proves that snow-streamer technology is an efficient way to carry out seismicprofiling in snow-covered and relatively flat terrain. Using detonating cord as a seismic sourcehas left no permanent footprint on the sparse vegetation in the Arctic, which is an advantage. Weconclude that the reflection seismic data are of high quality and that the obtained reflectors canbe interpreted in terms of regional geological structures continuing to a depth of 3-4 km. Wesuggest that the western part of the reprocessed Masi profile, and the Sennalandet profile,should be interpreted in a similar integrated way as the examples shown in the present report. 67206 |
format |
Report |
author |
Ruud, Bent Ole Olesen, Odleiv Gellein, Jomar Gellein Johansen, Tor Arne |
author_facet |
Ruud, Bent Ole Olesen, Odleiv Gellein, Jomar Gellein Johansen, Tor Arne |
author_sort |
Ruud, Bent Ole |
title |
Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway |
title_short |
Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway |
title_full |
Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway |
title_fullStr |
Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway |
title_full_unstemmed |
Acquisition, processing and interpretation of snow-streamer seismic profiles in Masi and Sennalandet, Finnmark, northern Norway |
title_sort |
acquisition, processing and interpretation of snow-streamer seismic profiles in masi and sennalandet, finnmark, northern norway |
publisher |
Norges geologiske undersøkelse |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2753549 |
op_coverage |
HAMMERFEST 29353: 19354 19352 19334 18331 KAUTOKEINO |
long_lat |
ENVELOPE(24.652,24.652,69.402,69.402) ENVELOPE(23.048,23.048,69.003,69.003) ENVELOPE(23.666,23.666,69.444,69.444) ENVELOPE(23.402,23.402,69.359,69.359) ENVELOPE(26.684,26.684,70.962,70.962) |
geographic |
Arctic Bergen Jergul Kautokeino Masi Norway Stuoragurra Sværholt |
geographic_facet |
Arctic Bergen Jergul Kautokeino Masi Norway Stuoragurra Sværholt |
genre |
Arctic Finnmark Hammerfest Kautokeino Masi Northern Norway Sennalandet Finnmark |
genre_facet |
Arctic Finnmark Hammerfest Kautokeino Masi Northern Norway Sennalandet Finnmark |
op_source |
35 s. |
op_relation |
NGU-Rapport (2021.004) 347100 urn:issn:0800-3416 https://hdl.handle.net/11250/2753549 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1766344945996660736 |