A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms
The main focus of this study has been to combine field observations of structural and geomorphological elements and interferometric synthetic aperture radar (InSAR) to investigate the unstable rock slope in Oksfjellet. The site is located along a NNE faced slope in a glacially eroded valley in Kåfjo...
Main Author: | |
---|---|
Format: | Master Thesis |
Language: | English |
Published: |
UiT Norges arktiske universitet
2016
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/9345 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/9345 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/9345 2023-05-15T15:42:08+02:00 A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms Bredal, Marie 2016-05-29 https://hdl.handle.net/10037/9345 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway https://hdl.handle.net/10037/9345 URN:NBN:no-uit_munin_8903 openAccess Copyright 2016 The Author(s) VDP::Technology: 500::Rock and petroleum disciplines: 510::Geological engineering: 513 VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Technology: 500::Environmental engineering: 610 VDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation visualization signal processing image processing: 429 VDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering visualisering signalbehandling bildeanalyse: 429 VDP::Mathematics and natural science: 400::Geosciences: 450::Physical geography: 455 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Naturgeografi: 455 VDP::Technology: 500::Information and communication technology: 550::Geographical information systems: 555 VDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550::Geografiske informasjonssystemer: 555 GEO-3900 Master thesis Mastergradsoppgave 2016 ftunivtroemsoe 2021-06-25T17:54:47Z The main focus of this study has been to combine field observations of structural and geomorphological elements and interferometric synthetic aperture radar (InSAR) to investigate the unstable rock slope in Oksfjellet. The site is located along a NNE faced slope in a glacially eroded valley in Kåfjord, Troms. The Caledonian bedrock comprises mainly mica schists and display ductile (Caledonian) and brittle (post-Caledonian) structures. Brittle faults and fractures trending NE-SW and NW-SE and a ductile shear zone/thrust seem to have controlled the location of the unstable rock slope. Displacements detected by InSAR correlated well to bedrock structures and morphological elements observed in the field. Satellite InSAR detected displacements, down to a rate of less than 1 mm/year, that is thought to reflect geological processes. It can be concluded that the combination of satellite InSAR and ground-based InSAR provided additional and important information that complemented field observations, and proved valuable in order to assess displacements patterns at different temporal and spatial scales. Toppling and wedge failures along pre-existing post-Caledonian fractures are the main failure mechanisms in Oksfjellet, but sliding along foliation surfaces is also a viable failure mechanism. A deep-seated sliding surface is indicated along the thrust parallel foliation or along the intersection between foliation/thrust and fractures, producing an overall down to the NNE movement of the unstable area. The slope is classified as a complex field with similarities to deep-seated gravitational slope deformations. Fractures and faults delimiting the unstable rock slope at Oksfjellet coincides with NNE-SSW to NE-SW and NW-SE trending regional Mesozoic brittle structures. Master Thesis Berg Kåfjord Troms University of Tromsø: Munin Open Research Archive in Kåfjord ENVELOPE(25.720,25.720,70.864,70.864) |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Technology: 500::Rock and petroleum disciplines: 510::Geological engineering: 513 VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Technology: 500::Environmental engineering: 610 VDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation visualization signal processing image processing: 429 VDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering visualisering signalbehandling bildeanalyse: 429 VDP::Mathematics and natural science: 400::Geosciences: 450::Physical geography: 455 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Naturgeografi: 455 VDP::Technology: 500::Information and communication technology: 550::Geographical information systems: 555 VDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550::Geografiske informasjonssystemer: 555 GEO-3900 |
spellingShingle |
VDP::Technology: 500::Rock and petroleum disciplines: 510::Geological engineering: 513 VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Technology: 500::Environmental engineering: 610 VDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation visualization signal processing image processing: 429 VDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering visualisering signalbehandling bildeanalyse: 429 VDP::Mathematics and natural science: 400::Geosciences: 450::Physical geography: 455 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Naturgeografi: 455 VDP::Technology: 500::Information and communication technology: 550::Geographical information systems: 555 VDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550::Geografiske informasjonssystemer: 555 GEO-3900 Bredal, Marie A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms |
topic_facet |
VDP::Technology: 500::Rock and petroleum disciplines: 510::Geological engineering: 513 VDP::Teknologi: 500::Berg‑ og petroleumsfag: 510::Geoteknikk: 513 VDP::Mathematics and natural science: 400::Geosciences: 450::Tectonics: 463 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Tektonikk: 463 VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Technology: 500::Environmental engineering: 610 VDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation visualization signal processing image processing: 429 VDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering visualisering signalbehandling bildeanalyse: 429 VDP::Mathematics and natural science: 400::Geosciences: 450::Physical geography: 455 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Naturgeografi: 455 VDP::Technology: 500::Information and communication technology: 550::Geographical information systems: 555 VDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550::Geografiske informasjonssystemer: 555 GEO-3900 |
description |
The main focus of this study has been to combine field observations of structural and geomorphological elements and interferometric synthetic aperture radar (InSAR) to investigate the unstable rock slope in Oksfjellet. The site is located along a NNE faced slope in a glacially eroded valley in Kåfjord, Troms. The Caledonian bedrock comprises mainly mica schists and display ductile (Caledonian) and brittle (post-Caledonian) structures. Brittle faults and fractures trending NE-SW and NW-SE and a ductile shear zone/thrust seem to have controlled the location of the unstable rock slope. Displacements detected by InSAR correlated well to bedrock structures and morphological elements observed in the field. Satellite InSAR detected displacements, down to a rate of less than 1 mm/year, that is thought to reflect geological processes. It can be concluded that the combination of satellite InSAR and ground-based InSAR provided additional and important information that complemented field observations, and proved valuable in order to assess displacements patterns at different temporal and spatial scales. Toppling and wedge failures along pre-existing post-Caledonian fractures are the main failure mechanisms in Oksfjellet, but sliding along foliation surfaces is also a viable failure mechanism. A deep-seated sliding surface is indicated along the thrust parallel foliation or along the intersection between foliation/thrust and fractures, producing an overall down to the NNE movement of the unstable area. The slope is classified as a complex field with similarities to deep-seated gravitational slope deformations. Fractures and faults delimiting the unstable rock slope at Oksfjellet coincides with NNE-SSW to NE-SW and NW-SE trending regional Mesozoic brittle structures. |
format |
Master Thesis |
author |
Bredal, Marie |
author_facet |
Bredal, Marie |
author_sort |
Bredal, Marie |
title |
A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms |
title_short |
A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms |
title_full |
A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms |
title_fullStr |
A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms |
title_full_unstemmed |
A structural, geomorphological and InSAR study of the unstable rock slope in Oksfjellet, Kåfjord, Troms |
title_sort |
structural, geomorphological and insar study of the unstable rock slope in oksfjellet, kåfjord, troms |
publisher |
UiT Norges arktiske universitet |
publishDate |
2016 |
url |
https://hdl.handle.net/10037/9345 |
long_lat |
ENVELOPE(25.720,25.720,70.864,70.864) |
geographic |
in Kåfjord |
geographic_facet |
in Kåfjord |
genre |
Berg Kåfjord Troms |
genre_facet |
Berg Kåfjord Troms |
op_relation |
https://hdl.handle.net/10037/9345 URN:NBN:no-uit_munin_8903 |
op_rights |
openAccess Copyright 2016 The Author(s) |
_version_ |
1766374974107418624 |