Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications
The Stuoragurra Fault Complex (SFC) constitutes the Norwegian part of the larger Lapland Province of postglacial faults in northern Fennoscandia. The 90 km long SFC consists of two separate fault systems: the Máze Fault (revised) System in the southwestern area and the Iešjávri Fault System to the n...
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Norges geologiske undersøkelse
2023
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ftnorgesgu:oai:openarchive.ngu.no:11250/3108225 2024-01-14T09:59:01+01:00 Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications Olsen, L. Olesen, O. KARASJOK 19334 Masi PORSANGER KAUTOKEINO ALTA 20344 Skoganvarre 19343 Suoluvuobmi 19342 Iesjavri 19341 Cåkkaras'sa 2023 application/pdf https://hdl.handle.net/11250/3108225 eng eng Norges geologiske undersøkelse NGU-Rapport (2023.026) (404400) GoN - Geophysics of Norway GIS & Atlas urn:issn:0800-3416 https://hdl.handle.net/11250/3108225 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no 63 DATERING GEOFYSIKK FORKASTNING BREKSJE SKRED NEOTEKTONIKK Report 2023 ftnorgesgu 2023-12-20T23:51:03Z The Stuoragurra Fault Complex (SFC) constitutes the Norwegian part of the larger Lapland Province of postglacial faults in northern Fennoscandia. The 90 km long SFC consists of two separate fault systems: the Máze Fault (revised) System in the southwestern area and the Iešjávri Fault System to the northeast. The distance between the fault systems is 12 km. The faults dip at an angle of 30–75° to the SE. Here we present data from trenching of different fault sections. The trenching reveals deformed overburden in all 11 sites and inclusions of peat and organic bearing soil in the deformed and partly overrun loose deposits on the footwall in most of the sites. Radiocarbon dating of macro remains of plants located in buried and severely deformed sediment horizons indicates late Holocene ages for the (final) formation of the different fault segments, more specifically that the faulting at Fitnajohka and Máze in the Máze Fault System formed during earthquakes younger than c. 470-500 years ago. 69261 Report Alta Fennoscandia Finnmark Karasjok Kautokeino Masi Northern Norway Porsanger Finnmark Lapland NGU Open Archive (Geological Survey of Norway) Alta Iešjávri ENVELOPE(27.619,27.619,70.480,70.480) Karasjok ENVELOPE(25.519,25.519,69.472,69.472) Kautokeino ENVELOPE(23.048,23.048,69.003,69.003) Masi ENVELOPE(23.666,23.666,69.444,69.444) Norway Porsanger ENVELOPE(24.956,24.956,70.052,70.052) Skoganvarre ENVELOPE(25.078,25.078,69.840,69.840) Stuoragurra ENVELOPE(23.402,23.402,69.359,69.359) Suoluvuobmi ENVELOPE(23.535,23.535,69.583,69.583) |
institution |
Open Polar |
collection |
NGU Open Archive (Geological Survey of Norway) |
op_collection_id |
ftnorgesgu |
language |
English |
topic |
DATERING GEOFYSIKK FORKASTNING BREKSJE SKRED NEOTEKTONIKK |
spellingShingle |
DATERING GEOFYSIKK FORKASTNING BREKSJE SKRED NEOTEKTONIKK Olsen, L. Olesen, O. Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications |
topic_facet |
DATERING GEOFYSIKK FORKASTNING BREKSJE SKRED NEOTEKTONIKK |
description |
The Stuoragurra Fault Complex (SFC) constitutes the Norwegian part of the larger Lapland Province of postglacial faults in northern Fennoscandia. The 90 km long SFC consists of two separate fault systems: the Máze Fault (revised) System in the southwestern area and the Iešjávri Fault System to the northeast. The distance between the fault systems is 12 km. The faults dip at an angle of 30–75° to the SE. Here we present data from trenching of different fault sections. The trenching reveals deformed overburden in all 11 sites and inclusions of peat and organic bearing soil in the deformed and partly overrun loose deposits on the footwall in most of the sites. Radiocarbon dating of macro remains of plants located in buried and severely deformed sediment horizons indicates late Holocene ages for the (final) formation of the different fault segments, more specifically that the faulting at Fitnajohka and Máze in the Máze Fault System formed during earthquakes younger than c. 470-500 years ago. 69261 |
format |
Report |
author |
Olsen, L. Olesen, O. |
author_facet |
Olsen, L. Olesen, O. |
author_sort |
Olsen, L. |
title |
Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications |
title_short |
Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications |
title_full |
Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications |
title_fullStr |
Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications |
title_full_unstemmed |
Trenching and 14C dating of the postglacial Stuoragurra Fault Complex in Finnmark, Northern Norway, and geohazard implications |
title_sort |
trenching and 14c dating of the postglacial stuoragurra fault complex in finnmark, northern norway, and geohazard implications |
publisher |
Norges geologiske undersøkelse |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3108225 |
op_coverage |
KARASJOK 19334 Masi PORSANGER KAUTOKEINO ALTA 20344 Skoganvarre 19343 Suoluvuobmi 19342 Iesjavri 19341 Cåkkaras'sa |
long_lat |
ENVELOPE(27.619,27.619,70.480,70.480) ENVELOPE(25.519,25.519,69.472,69.472) ENVELOPE(23.048,23.048,69.003,69.003) ENVELOPE(23.666,23.666,69.444,69.444) ENVELOPE(24.956,24.956,70.052,70.052) ENVELOPE(25.078,25.078,69.840,69.840) ENVELOPE(23.402,23.402,69.359,69.359) ENVELOPE(23.535,23.535,69.583,69.583) |
geographic |
Alta Iešjávri Karasjok Kautokeino Masi Norway Porsanger Skoganvarre Stuoragurra Suoluvuobmi |
geographic_facet |
Alta Iešjávri Karasjok Kautokeino Masi Norway Porsanger Skoganvarre Stuoragurra Suoluvuobmi |
genre |
Alta Fennoscandia Finnmark Karasjok Kautokeino Masi Northern Norway Porsanger Finnmark Lapland |
genre_facet |
Alta Fennoscandia Finnmark Karasjok Kautokeino Masi Northern Norway Porsanger Finnmark Lapland |
op_source |
63 |
op_relation |
NGU-Rapport (2023.026) (404400) GoN - Geophysics of Norway GIS & Atlas urn:issn:0800-3416 https://hdl.handle.net/11250/3108225 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
_version_ |
1788067352546377728 |