Blar i Bergen Open Research Archive på forfatter "Fossen, Haakon"
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Quartz textural analysis from an anastomosing shear zone system: Implications for the tectonic evolution of the Ribeira belt, Brazil
Conte, Thailli; Cavalcante, Carolina; Lagoeiro, Leonardo Evangelista; Fossen, Haakon; Silveira, C.S. (Journal article; Peer reviewed, 2020)Strain localization and influence of grain-size reduction processes were investigated from field and microstructural observations, and from quartz textural analysis using EBSD, in rocks deformed along an anastomosing network ... -
Reviewing the puzzling intracontinental termination of the Araçuaí-West Congo orogenic belt and its implications for orogenic development
Cavalcante, Carolina; Fossen, Haakon; Almeida, Renato Paes de; Hollanda, M.H.B.M.; Egydio-Silva, Marcos (Peer reviewed; Journal article, 2019)Palinspastic reconstructions suggest that the late Proterozoic–Cambrian Brasiliano/Pan-African orogenic belt in southeast Brazil and west Congo terminated northwards into an embayment within the São Francisco-Congo cratonic ... -
Rift kinematics preserved in deep-time erosional landscape below the northern North Sea
Wrona, Thilo; Whittaker, Alexander C.; Bell, Rebecca E.; Gawthorpe, Rob; Fossen, Haakon; Jackson, Christopher A.-L.; Bauck, Marit Stokke (Journal article; Peer reviewed, 2022)Our understanding of continental rifting is, in large parts, derived from the stratigraphic record. This record is, however, incomplete as it does not often capture the geomorphic and erosional signal of rifting. New 3D ... -
Sand textural control on shear-enhanced compaction bands in poorly-lithified sandstone
Skurtveit, Elin; Ballas, G.; Fossen, Haakon; Torabi, Anita; Soliva, Roger; Peyret, M. (Peer reviewed; Journal article, 2014)Sand textural control on SECB (shear-enhanced compaction band) formation is analyzed combining field observations, detailed material characterization and mechanical testing for poorly lithified sandstone units in Provence ... -
Segmentation of the Caledonian orogenic infrastructure and exhumation of the Western Gneiss Region during transtensional collapse
Wiest, Johannes; Jacobs, Joachim; Fossen, Haakon; Ganerød, Morgan; Osmundsen, Per Terje (Journal article; Peer reviewed, 2021)The (ultra)high-pressure Western Gneiss Region of the Norwegian Caledonides represents an archetypical orogenic infrastructure of a continent–continent collision zone. To test established exhumation models, we synthesize ... -
Seismic expression of shear zones: Insights from 2-D point-spread-function based convolution modelling
Wrona, Thilo; Fossen, Haakon; Lecomte, Isabelle; Eide, Christian Haug; Gawthorpe, Rob (Journal article; Peer reviewed, 2020)Shear zones are common strain localization structures in the middle and lower crust and play a major role during orogeny, transcurrent movements and rifting alike. Our understanding of crustal deformation depends on our ... -
Shear zone evolution during core complex exhumation – Implications for continental detachments
Wiest, Johannes; Fossen, Haakon; Jacobs, Joachim (Journal article; Peer reviewed, 2020)The formation of low-angle detachments involves exhumation of previously ductile material and fault zone weakening. To better understand this relationship, we studied a deeply eroded metamorphic core complex, which formed ... -
Spatial variability in topology, connectivity and permeability of deformation band networks: Insights from the Jurassic Entrada Sandstone, Utah
Heggernes, Hakan; Rotevatn, Atle; Demurtas, Matteo; Nixon, Casey William; Fossen, Haakon (Journal article; Peer reviewed, 2023)Networks of deformation bands have the potential to act as baffles to fluid flow, yet little work has been devoted to addressing their network properties, such as topology and connectivity. Motivated by this, we investigate ... -
Strain migration during multiphase extension, Stord Basin, northern North Sea rift
Fazlikhani, Hamed; Aagotnes, Synne; Refvem, Marte; Hamilton-Wright, James; Bell, Rebecca E.; Fossen, Haakon; Gawthorpe, Rob; Jackson, Christopher A.-L.; Rotevatn, Atle (Journal article; Peer reviewed, 2021)In regions experiencing multiple phases of extension, rift‐related strain can vary along and across the basin during and between each phase, and the location of maximum extension can differ between the rift phase. Despite ... -
Structural architecture and composition of crystalline basement offshore west Norway
Lenhart, Antje; Jackson, Christopher AL; Bell, Rebecca E.; Duffy, Oliver B.; Gawthorpe, Rob; Fossen, Haakon (Peer reviewed; Journal article, 2019-02-05)Numerous studies have investigated the geodynamic history and lithological composition of the Proterozoic basement, Caledonian nappes, and Devonian extensional basins and shear zones onshore west Norway. However, the ... -
TitaniQ temperatures and textural analysis as a record of the deformation history in a major continental shear zone system, Borborema Province, Brazil
Cavalcante, Carolina; de Jesus Costa, Juliana; Lagoeiro, Leonardo; Fossen, Haakon; Lee, Amicia; Archanjo, Carlos; Vizeu, Roberto (Journal article; Peer reviewed, 2022)We combine quartz textural analysis with Titanium-in-quartz (TitaniQ) geothermometry to investigate the late stages of deformation in mylonitic rocks from the Sucuru dike swarm in the Borborema Province. The wide range in ... -
Topological Characterization of a Fault Network Along the Northern North Sea Rift Margin
Osagiede, Edoseghe Edwin; Nixon, Casey William; Gawthorpe, Rob; Rotevatn, Atle; Fossen, Haakon; Jackson, Christopher A.-L.; Tillmans, Fabian (Journal article; Peer reviewed, 2023)The factors that control the spatial variation of the topological characteristics of normal fault networks at the rift-scale are poorly understood. Here, we use 3D seismic reflection data from the northern North Sea to ... -
Zippered Shear Zone Model for Interacting Shear Zones in the Borborema Province, Brazil, as Constrained by U-Pb Dating
Avila, Carlos F.; Archanjo, Carlos J; Fossen, Haakon (Peer reviewed; Journal article, 2019)Shear zones typically interact to form connected systems or networks to accommodate crustal deformation, but our knowledge of how this happens is fragmentary. Understanding branching and interacting shear zones requires ...