My current grad-students and some of their projects
Plaster experiments, with Signe Ottesen (Statoil), Tore Odinsen (Statoil), Eivind Bastesen and Atle Rotevatn
Plaster can be used to model different kinds of (mostly) brittle deformation in the laboratory. Three students have recently started to model within the three principal tectonic regimes; extension, contraction and strike-slip.
• Study fault geometries formed in the three different regimes
• Compare with real examples from outcrop and seismic data sets
• Explore the temporal development of structures in the different settings under different boundary conditions.
• Understand the range of likely and possible deformation styles in the three different regimes, from large- to small-scale structures.
YouTube movie of plaster experiment.
Strike-slip model (Nov 13, 2013).
Utah sandstone project I, with John Howell (U of Aberdeen)
The background for these theses is the fact that different sandstone units on the Colorado Plateau weather and fracture differently. Some form mesas with very steep (subvertical) cliffs, while others form more undulating and “soft” shapes with less steep slopes. We can quantify this in 2d by measuring slopes along traverses/profiles, or in 3d by means of digital elevation models. The differences in weathering and the way that the sandstones fracture are closely related. Some developed lots of fractures (joints) while others develop very few.
These studies will involve
•Comparing sedimentary facies
•Comparing fracture development
•Comparing diagenesis, burial depth, rock mechanical properties, grain size, grain size distribution etc.
Navajo Sst atop Wingate Sst. The Wingate fracture heavily, making steep cliffs while the Navajo erodes into more gentle landforms with less prominent fractures.
Moab Mbr showing systematic fracture pattern above much less-fractured Slickrock Sandstone near Moab.
Utah sandstone project II: contractional deformation of sandstone
• Structural mapping of thrust faults in the Entrada and Curtis Formati
Rifting, North Sea Rift
• Interpretation of seismic data and well information in order to understand the evolution and structural geometry of this rift at various scales.
Utah sandstone project I:
Linn Heienberg: Mineralogical and lithological controls on fracture patterns of selected arid continental deposits on the Colorado Plateau. With John Howell. MSc
Mette Lundberg: Mineralogy and weathering characteristics of selected Cretaceous shallow marine and paralic deposits of the Book Cliffs area, Colorado Plateau. With John Howell. MSc.
Ragnhild Tunheim: Mineralogy and weathering characteristics of selected arid continental deposits of the Colorado Plateau. With John Howell.
Utah sandstone project II:
Marita Thommassen: Contractional deformation of sandstone. Project: COPS. MSc
Rifting, North Sea Rift:
Rosa Polanco-Ferrer: Northern North Sea rift system, with emphasis on the Tampen area. With Tore Odinsen and others, Statoil. Project: MultiRift. PhD.
Chao Deng (PhD, U of Bergen): North Sea Rift, modeling. Project: MultiRift. PhD.
Anette Broch Mathisen Tvedt: Salt tectonics (Main advisor: Atle Rotevatn). Project: SALTEC. PhD.
Antje Lenhart: Tectono-stratigraphic evolution of multiphase rift basins. Main advisor: Christopher Jackson. Institution: Imperial College. Project: MultiRift. PhD.
Flavio Almeida: Fault growth and fault interaction, northern North Sea. With Paul Whipp (Statoil). Project: Fault interaction.
Synne Skaar Ågotnes: Fault growth and fault interaction, northern North Sea. With Hamed Fazli Khani. Project: MultiRift. MSc.
Marte Refvem: Fault growth and fault interaction, northern North Sea. With Hamed Fazli Khani. Project: MultiRift. MSc
Deformation of porous sandstones:
Luisa Zuluaga: Contraction of porous sandstones (COPS). Project: COPS. PhD
Sand injection, Utsira Fm: