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Anell, Ingrid
(2023).
SPÅRLÖST: En geologisk vandring på Australiens urtida havsbotten, strax innan livet uppstod.
Geologiskt forum : Geologiska Föreningens populärvetenskapliga tidskrift.
ISSN 1104-4721.
120,
s. 20–23.
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Anell, Ingrid
(2023).
Naturens Uberegnelige Ekvasjon .
geoforskning.no.
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Anell, Ingrid
(2023).
More and more molehills – The effect of accumulated unconscious gender bias.
EGU Blogs.
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Anell, Ingrid
(2023).
Kjært gjensyn på andre siden av kloden.
geoforskning.no.
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Anell, Ingrid; Jemterud, Torkild; Gravensteen, Ida Kathrine & Sandtorv, Alexander Harald
(2023).
Abels Tårn Hvorfor sier norske leger: "drikk vann".
[Radio].
Voksenopplæringa i Oslo.
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Anell, Ingrid
(2023).
Curvature analysis of continental margins and the link between shape and processes.
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Anell, Ingrid
(2022).
Legoklossen som bygger alt fra rifler til kontinenter.
geoforskning.no.
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Anell, Ingrid; Braathen, Alvar; Midtkandal, Ivar; Grimsrud Olsen, Stine; Haugen, Maria & Wallace, Malcolm W
(2022).
Geometric controls on clinoforms, the building blocks of sedimentary basins – from ripple to shelf-edge.
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Machado Garcia, Aurora; Bellwald, Benjamin; Midtkandal, Ivar; Planke, Sverre; Sternai, Pietro & Anell, Ingrid
[Vis alle 7 forfattere av denne artikkelen]
(2022).
Stratigraphy of a complete glacial-interglacial cycle: The sedimentary record of the last glaciation at the North Sea Fan.
Vis sammendrag
Trough mouth fans are major submarine depocentres that form in front of ice streams that advance onto the continental shelf. They provide extensive records of past glaciations and ice sheet dynamics, and understanding their deposits and sedimentary processes is key when interpreting glaciated margins. In this study, we use high-quality 3D reflection seismic data with a vertical resolution of 2 m and a bin size of 6.25 x 18.75 m extending over 14000 km2 at the uppermost North Sea Fan. The aim is to document the seismic stratigraphy, sedimentary processes and glacio-marine landforms shaped during different paleo-geographical configurations prevailing since Marine Isotope Stage 6 (last 130 ka). Using facies analyses and seismic geomorphology the sequence is subdivided into eight seismic units (U1-8), separated by high-amplitude continuous reflections. The uppermost stratigraphy of the fan is characterized by >400 m of prograding strata, spanning from the top of the Tampen Slide at its deepest to the seabed on the more shallow shelf, accounting to 7160 km3 of sediments. The lowermost two units, U1 and U2, are characterized by continuous reflections with increasing amplitude contrasts near the Tampen Slide headwall. U1 is a tabular body and covers the entire study area, while U2 is lenticular and limited to the northern part, confined by a secondary headwall. Units U3-6 are characterized by a combination of chaotic, transparent, structurally deformed or parallel to sub-parallel seismic facies. They are limited by high-amplitude reflections with erosional features with varying dimensions from
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Machado Garcia, Aurora; Bellwald, Benjamin; Midtkandal, Ivar; Planke, Sverre; Anell, Ingrid & Sternai, Pietro
[Vis alle 7 forfattere av denne artikkelen]
(2022).
Mixed sedimentation of the North Sea Fan - insights on volumes of contourites, plumites and downslope deposits during a full glacial- interglacial cycle.
EGU General Assembly Conference Abstracts.
doi:
10.5194/egusphere-egu22-10658.
Vis sammendrag
Trough mouth fans are important depocenters for glacial sedimentation in high latitude margins,recording sedimentological processes and their relationship with paleoclimatic fluctuations onshort timescales - from decades to millennia. The volume of sediments accumulated in these fansvaries significantly depending on the phase of the glacial cycle, with higher values typically reachedduring early retreats. The input of large volumes during short time intervals can potentially triggersubmarine landslides and overpressure build-up, making the understanding of processes andproportions related to sedimentation in glaciated margins crucial, especially during periods ofglobal warming. In this study we use high-quality 3D seismic cubes (vertical resolution of 2 m andbin size of 6.25 x 18.75 m) to delimitate different types of deposits on an area over 14000 km2 onthe North Sea Trough Mouth Fan during a full glacial-interglacial cycle of the last glaciation(Weichselian). After mapping the corresponding top and base surfaces of each type of deposittheir volumes were calculated using the mean thickness of the beds multiplied by their extent. Thebase of the studied package comprises a contourite body deposited on top of the Tampen Slide,whose failure is estimated to have happened around 130 ka ago. Next we have a thick (> 400 m)mixed package of debris flows and meltwater turbidites, with its rapid deposition happeningduring approximately 4 ka (~23 to 19 ka). The package is then completed with plume settlingrelated to the full retreat of the ice stream. Although not completely interpreted due to limitationsof the dataset extent and remobilization of a part of the fan by the Storegga Slide in the northernpart, the last glacial cycle comprises a total of 7160 km3 of sediments, with more than half of it(4850 km3) originated from the downslope processes. The plumites and contourites comprisevolumes of 1105 km3 and 1205 km3. This accounts to a significant variability of the magnitude ofsediment volume coming into the sink per year, with the downslope deposits having over 100times more sediment input and the plumites 5 times more when compared to thecontourites. These results highlight the range of sediment volume that can be delivered in aglaciated margin depending on changes in processes and climatic fluctuations, which may also entail changes in the potential geohazards.
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Braathen, Catherine & Anell, Ingrid
(2021).
CCS at the OHG-conference - Key note lecture from Anell & Co.
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Machado Garcia, Aurora; Bellwald, Benjamin; Midtkandal, Ivar; Anell, Ingrid; Planke, Sverre & Sternai, Pietro
[Vis alle 7 forfattere av denne artikkelen]
(2021).
Sedimentary Processes and Deposits of the Last Glaciation at the North Sea Fan, Offshore Norway.
Vis sammendrag
Understanding the sedimentary processes and resulting deposits along glaciated margins, that can be recorded in trough mouth fans (TMF), is crucial to increase knowledge about ice sheet dynamics. Their behavior influences Earth’s climate system and sea level variations, from regional to global scale, during relatively rapid timescales (up to millennia). This study uses high-quality 3D seismic reflection data of the uppermost North Sea Trough Mouth Fan to document the seismic stratigraphy, sedimentary processes and glacio-marine landforms shaped during the last glacial highstand (23-19 ka). The stratigraphy of the fan is characterized by thick (~400m) prograding sequences. Facies analyses and seismic geomorphology show three main depositional processes (contour-currents, gravity-driven flows and setting of plumes), mappable as seven seismic sub-units in the studied interval. Contour currents are responsible for the deposition of the lowermost two sub-units (U1 and U2), characterized by continuous reflections with increasing amplitude contrasts near the Tampen Slide escarpment. U1 is dominated by positive amplitudes with mostly tabular geometry. U2, identified in the northern part, is dominated by negative amplitudes with lenticular geometry and is synchronous with the glaciation onset. These sub-units are followed by a succession of relatively homogeneous facies interrupted by continuous high-frequency horizons that subdivide the succession into four sub-units (U3-6). These sub-units are characterized by channels, presumably generated by meltwater-fed turbidity flows, varying in width, varying in depth from 10 to 60m and with suggesting high-energy episodes that creates channels deeper than 100m. They are pervasive throughout the sequences and across the fan and are commonly isolated with low sinuosity. The uppermost sequence (U7) is dominated by deposition of the suspended load and ice-raft debris, characterized by parallel and slightly undulated continuous inner reflections, thinning out downslope. Along the shelf, multiple cross-cutting of iceberg scours and pits are observed. The succession with channels evidence that meltwater can play a major role in TMF sedimentation. These new insights about the smaller-scale processes within seismic resolution demonstrate the variability of active processes during a fast sedimentation period of the Weichselian Glaciation at the North Sea Trough Mouth Fan.
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Machado Garcia, Aurora; Midtkandal, Ivar; Bellwald, Benjamin & Anell, Ingrid Margareta
(2021).
A Source to Sink Approach to the North Sea Fan Pleistocene Glacial Sediments.
Vis sammendrag
Trough mouth fans are large depocentres forming the ultimate sinks in glacial source-to-sink systems. Their architecture, sedimentological aspects (origin and processes) and their role as paleoclimatic archives are essential components in improving our understanding of Pleistocene and ongoing climate changes. For many years, these depocentres were thought to be dominated by debris flows accumulated in front of ice streams located at the shelf break. However, recent studies have shown that meltwater plays a major role in bringing sediment to the most distal parts of these fans, especially in lower latitudes. The North Sea Trough Mouth Fan encompasses ~110,000 km2 with water depths of up to 3500 m. It has received sediments throughout the Quaternary, with increased sedimentation rates in the last 1.1 Ma when the Norwegian Channel Ice Stream was active. Recent insight of the fan shows that meltwater turbidites play a major role in sediment delivery to the continental slope and deep-sea basin. The results could entail distinct morphologies for mid-latitude and high-latitude fans. As a result of glacial erosion and the absence of clear imprints of ice sheets on the paleo-shelves, studying trough mouth fan deposits becomes paramount in understanding glacial-interglacial cycles. This project will assess the source-to-sink parameters of the last glaciation (Weichselian) at the North Sea Fan, elucidating the dominant marine and terrestrial processes that led to the studied sedimentary sequences. High-resolution 2D and 3D seismic data, core, volumetric and numerical modeling data will be assimilated to establish a source-to-sink model for the target interval. These results will contribute to the knowledge of how glaciations affect surface mass redistribution, directly affecting the landscape dynamics and sediment routing from Fennoscandia via the North Sea to the slopes and deep basin. Sediment production will be evaluated, assessing whether it increases during the glaciation or if observed higher sedimentation rates are a result of enhanced sediment transport. This project is a part of the Marie Sklodowska-Curie Innovative Training Networks “S2S – Future: Signal propagation in source to sink for the future of the Earth resources and energy” and will further advance how trough mouth flans are highly dynamic areas where sediment transport, dispersal, remobilization and deposition take place, and serve as excellent proxies to the dynamics of glacial pulses in the hinterland.
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Würtzen, Camilla Louise; Osmond, Johnathon L.; Faleide, Jan Inge; Nystuen, Johan Petter; Anell, Ingrid Margareta & Midtkandal, Ivar
(2021).
Syn- to post rift alluvial basin fill: seismic stratigraphic analysis of Permian-Triassic deposition in the Horda Platform.
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Faleide, Thea Sveva; Braathen, Alvar; Lecomte, Isabelle; Mulrooney, Mark Joseph; Anell, Ingrid Margareta & Midtkandal, Ivar
[Vis alle 7 forfattere av denne artikkelen]
(2020).
Testing seismic interpretation of faults by modelling; viable geometries versus seismic resolution in the subsurface.
EAGE extended abstracts.
2020.
doi:
10.3997/2214-4609.202011930.
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Buckley, Simon John; Ringdal, Kari; Lecomte, Isabelle; Anell, Ingrid Margareta & Braathen, Alvar
(2020).
Virtual field trip to seismic scale outcrops of the Triassic, Edgeøya, Svalbard.
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Anell, Ingrid Margareta; Serck, Christopher Sæbø; Zuchuat, Valentin & Braathen, Alvar
(2020).
Structural influence on Triassic deposition on the Northern Barents Shelf.
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Faleide, Thea Sveva; Braathen, Alvar; Lecomte, Isabelle; Anell, Ingrid Margareta; Midtkandal, Ivar & Planke, Sverre
(2020).
Seismic modelling of faults; viable geometries vs seismic resolution in the subsurface.
Vis sammendrag
Resolution and illumination issues in seismic data curtails identification of fault geometries and fault-initiated rock damage when mapping subsurface faults. Seismic modelling can be utilized to bridge the gap in identifying what can be imaged with certainty in seismic data, with respect to the original geology, especially when also comparing to outcrop data. In this study, we explore how seismic modelling can distinguish between real structures versus seismic artefacts. 2(3)D Point-Spread-Function based convolution modelling is used in a sensitivity study. One input is detailed fault interpretations of high-resolution P-Cable data and comparable conventional 3D seismic data from the Hoop area in the Barents Sea. Another dataset comes from detailed fault geometries observed in outcrops, which were used to build geological models as input to the seismic modelling. In addition to the host-rock lithofacies, parameters of importance for the geological model building include overall fault geometry and the distribution of architectural elements (fault facies) within the fault zone. By varying fault input, lithofacies, a wide range of frequencies, and illumination, we analyse a variety of synthetic seismic images. Finally we compare our modelled outcomes with seismic data from the Hoop area. The scope of the workflow is to increase confidence in seismic interpretations and to identify limitations in the analysis of steep, normal faults in seismic data.
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Braathen, Catherine & Anell, Ingrid
(2019).
Successfull “Outside the BoCCS” seminar – The role of law in CCS deployment.
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Anell, Ingrid Margareta; Backer, Dag; Sundal, Anja; Torvanger, Asbjørn; Meisingset, Egil & Rørvik, Kari-Lise
[Vis alle 7 forfattere av denne artikkelen]
(2019).
Feasibility of CO2 storage as a climate mitigation measure in Norway.
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Faleide, Thea Sveva; Midtkandal, Ivar; Planke, Sverre; Corseri, Romain; Faleide, Jan Inge & Nystuen, Johan Petter
[Vis alle 8 forfattere av denne artikkelen]
(2019).
High-resolution seismic imaging and modelling of structural and stratigraphical features in the SW Barents Sea.
Vis sammendrag
Poster at the AAPG 2019 conference, San Antonio, Texas, USA
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Anell, Ingrid Margareta
(2019).
NCCS – Education, mobility, student engagement and visions for the future.
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Buckley, Simon John; Ringdal, Kari; Dolva, Benjamin; Lecomte, Isabelle; Anell, Ingrid Margareta & Braathen, Alvar
(2018).
A virtual field trip to seismic-scale outcrops of the Triassic, Edgeøya, Svalbard.
Vis sammendrag
Large-scale cliff sections on Edgeøya, an island in the eastern part of the Svalbard Archipelago, comprise mostly Triassic sedimentary successions, and are onshore outcrops of formations found on the offshore Barents Shelf. These outcrops are of high interest for studying the subsurface geology found offshore on the Barents Shelf, using seismic-scale features such as small-scale growth faults, paralic deposits and low-angle clinoforms (Anell et al., 2016). At Kvalpynten, an outcrop at the southern end of Edgeøya, these features can be observed, providing the opportunity to compare offshore seismic data with the outcrop expression using seismic modelling. Synthetic seismic modelling provides a means of aiding interpretation of seismic data by quantitatively and qualitatively assessing resolution, scale and level of detail of modelled onshore structures (Lecomte et al., 2015). This can give valuable insights into potential resolution and survey parameter issues, as well as limitations with seismic data.
Developments in digital outcrop modelling techniques, such as lidar and photogrammetry, now allow the accurate and high-resolution capture of large and inaccessible outcrop sections, at scales comparable with seismic vertical resolution. This opens up new possibilities for generating georeferenced input to synthetic seismic modelling, which allows generation of highly visual end products for educational purposes. This contribution presents a virtual field trip to the Triassic outcrops at Kvalpynten. The dataset is based on virtual outcrop models collected using boat-based photogrammetry, covering over 10km of continuous cliff sections. The 3D outcrop model is combined with geological interpretations, logs, field photos and information panels, as well as regional elevation data to set the context of the trip. In addition, synthetic seismic data are fused with the virtual outcrop models to highlight the scale of the exposures compared to offshore seismic data. The combined dataset is explored in LIME, a high performance viewer designed for displaying disparate geospatial and field datasets (http://virtualoutcrop.com/lime).
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Smyrak-Sikora, Aleksandra Anna; Osmundsen, Per Terje; Braathen, Alvar; Ogata, Kei; Anell, Ingrid Margareta & Husteli, Berit
[Vis alle 8 forfattere av denne artikkelen]
(2017).
Sedimentary architecture of siliciclastic, syntectonic graben and halfgraben fill in Kvalpynten, Edgeøya, Svalbard.
Vis sammendrag
An array of ten grabens/ half-grabens and their associated syntectonic basin fill (averaging approx. 700 m across) are exposed along a 9 km cliff section at Kvalpynten, Edgeøya, offering a unique opportunity to study the silisiclastic architecture of listric graben basin fill. The exposures at Kvalpynten provide a unique opportunity to correlate fault-controlled sedimentary architecture on the scale of meters to hundreds of meters with detailed facies relationships, and thus fault-induced differential accommodation with the depositional environments that filled it.
The basins developed in the Late Triassic, during the deposition of the Early Carnian to Early Norian deltaic successions of Tchermakfjellet and De Geerdalen formations which is approximately the onshore equivalent to the offshore Snadd Formation. The lowermost part of the ca 400 m high Kvalpynten cliff section reveals a number of NW–SE striking growth faults with 50–100 m offset, which bound basins filled with shale and sandstone wedges. Up section, the growth faults tip out, and are buried by undeformed deltaic deposits.
Integrated field studies including sedimentology and structural geology combined with surfaces mapping on a photogrammetric virtual outcrop model allowed incremental reconstruction of the grabens/ half-grabens evolution. Four transgressive surfaces were identified and mapped, allowing correlation of the sandstone packages between each basin. The sequence of faulting has been defined with respect to the mapped flooding surfaces. Faulting clearly occurred in several phases as evident by the syn-kinematic fault’s control on sediments of different ages, and from the occurrence of later forming faults rotating earlier formed fault blocks.
In general, early faults defined a relatively symmetrical basin configuration whereas later phases of movement were localized mainly along south-dipping faults. This gave rise to a change to more asymmetric basins and to the formation of asymmetric, composite sedimentary bodies with stacked shoreface and offshore transition deposits. Locally, fault crests were eroded. Our sedimentological observations suggest that tidal processes were dominant during sandstone deposition within the grabens/half-grabens, expressed by the widespread occurrence of tidal bar and tidal flat deposits.
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Buckley, Simon John; Ringdal, Kari; Dolva, Benjamin; Lecomte, Isabelle; Eide, Christian Haug & Anell, Ingrid Margareta
[Vis alle 7 forfattere av denne artikkelen]
(2017).
Digital outcrop modelling results and workflows for derived synthetic seismic imaging.
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Ogata, Kei; Mulrooney, Mark; Braathen, Alvar; Maher, Harmon; Smyrak-Sikora, Aleksandra Anna & Anell, Ingrid Margareta
[Vis alle 12 forfattere av denne artikkelen]
(2017).
Architecture, deformation style and petrophysical properties of a Late Triassic growth fault system in southern Edgeøya, East Svalbard.
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Anell, Ingrid Margareta; Braathen, Alvar; Røhnert, Daniela; Ogata, Kei; Osmundsen, Per Terje & Smyrak-Sikora, Aleksandra Anna
[Vis alle 10 forfattere av denne artikkelen]
(2017).
Findings of five field foragings. Sandbody distribution, clinoform geometries and depositional environments of Edgeøya, Svalbard.
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Braathen, Alvar; Mulrooney, Mark; Haile, Beyene Girma; Appleyard, Tyler Ross; van Yperen, Anna Elisabeth & Smyrak-Sikora, Aleksandra Anna
[Vis alle 12 forfattere av denne artikkelen]
(2017).
“Delta collapse” – Edgeøya delta system compared to the Ferron delta (Utah)
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Anell, Ingrid Margareta; Lecomte, Isabelle; Braathen, Alvar & Buckley, Simon John
(2016).
Synthetic seismic expression of the onshore Kvalpynten case study: Growth-faults. Low-angle prograding deltaic system.
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Ogata, Kei; Mulrooney, Mark; Braathen, Alvar; Maher, Harmon; Smyrak-Sikora, Aleksandra Anna & Anell, Ingrid Margareta
[Vis alle 12 forfattere av denne artikkelen]
(2016).
Field-based characterisation and analogue modelling of the South Edgeøya growth faults systems.
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Eide, Christian Haug; Klausen, Tore Grane; Anell, Ingrid Margareta; Suslova, Anna; Katov, Denis & Helland-Hansen, William
(2016).
Source-to-sink and mass-balance of the entire Triassic Barents Sea - Ideas, Plans and preliminary results.
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Buckley, Simon John; Ringdal, Kari; Lecomte, Isabelle; Anell, Ingrid Margareta; Braathen, Alvar & Eide, Christian Haug
(2016).
Virtual outcrops to synthetic seismic modelling.
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Anell, Ingrid Margareta; Braathen, Alvar & Faleide, Jan Inge
(2015).
Hidden below – Paleo-highs and deep structural influence on sedimentation on the Northern Barents Shelf.
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Buckley, Simon John; Dolva, Benjamin; Braathen, Alvar; Anell, Ingrid Margareta; Mulrooney, Mark & Lecomte, Isabelle
(2015).
State of-the-art of digital outcrop mapping methods: application to the Triassic of Edgeøya, Svalbard.
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Osmundsen, Per Terje; Smyrak-Sikora, Aleksandra Anna; Braathen, Alvar; Olaussen, Snorre; Ogata, Kei & Anell, Ingrid Margareta
(2015).
Growth basins at Edgeøya: sedimentary architecture and facies relationships.
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Lecomte, Isabelle; Buckley, Simon John & Anell, Ingrid Margareta
(2015).
Seismic modelling: Edgeøya and other illustration cases.
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Anell, Ingrid Margareta; Braathen, Alvar & Faleide, Jan Inge
(2015).
Shifting stress regimes and deep structural control on Triassic sedimentation.
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Anell, Ingrid Margareta & Midtkandal, Ivar
(2015).
Quantifiable clinothems and missing clinoforms : How studies down under can help our understanding of the Triassic of the Barents Shelf.
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Osmundsen, Per Terje; Smyrak-Sikora, Aleksandra Anna; Braathen, Alvar; Olaussen, Snorre; Ogata, Kei & Anell, Ingrid Margareta
(2015).
Sedimentary architecture and facies distribution in Late Triassic, reservoir-scale half-graben, De Geerdalen Formation, East Svalbard.
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Anell, Ingrid Margareta
(2015).
Edgeøya - en saga i sten.
Geologiskt forum : Geologiska Föreningens populärvetenskapliga tidskrift.
ISSN 1104-4721.
22(87),
s. 23–27.
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Braathen, Alvar; Anell, Ingrid Margareta; Smyrak-Sikora, Aleksandra Anna; Mulrooney, Mark; Haile, Beyene Girma & Ogata, Kei
[Vis alle 11 forfattere av denne artikkelen]
(2015).
Tectonic influence on platform infill patterns in the mid-late Triassic, Southern Edgeøya, Svalbard.
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Anell, Ingrid Margareta
(2014).
The Regional Triassic Puzzle - Origins of the Longyearbyen CO2 reservoir.
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Ogata, Kei; Anell, Ingrid Margareta; Braathen, Alvar; Osmundsen, Per Terje; Smyrak-Sikora, Aleksandra Anna & Husteli, Berit
[Vis alle 8 forfattere av denne artikkelen]
(2014).
Syndepositional faulting in the Late Triassic succession of Kvalpynten, Edgeøya, East Svalbard.
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Anell, Ingrid Margareta; Braathen, Alvar & Olaussen, Snorre
(2013).
Tracking the Triassic – early results of linking the Longyearbyen CO2 reservoir across the northern Barents Shelf.
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Olaussen, Snorre; Anell, Ingrid; Braathen, Alvar; Larsen, Leif; Mørk, Mai Britt Engeness & Ogata, Kei
[Vis alle 7 forfattere av denne artikkelen]
(2012).
Fluid flow test of a tight fractured and under-pressured reservoir unit, a case study from Longyearbyen CO2 drilling and test site, Adventdalen, Svalbard.
NGF abstracts and proceedings.
2012(3),
s. 39–42.
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Anell, Ingrid Margareta; Braathen, Alvar; Husteli, Berit; Larsen, Leif; Ogata, Kei & Olaussen, Snorre
[Vis alle 7 forfattere av denne artikkelen]
(2012).
State of the art fluid flow tests of tight fractured and under-pressured sandstone unit – De-risking of the potential CO2 storage unit in Adventdalen, Svalbard.
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Harris, Sharon; Anell, Ingrid Margareta; Sundal, Anja; Braathen, Alvar & Faleide, J I
(2019).
The tectono-sedimentary development of Smeaheia on the Horda Platform with a focus on the Cretaceous, and implications for CO2 storage.
7Letras.