A5020434494- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- High-pressure geophysics and materials
- Landslides and related hazards
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Geological Formations and Processes Exploration
- Geological Modeling and Analysis
- Geological and Geophysical Studies
- Geological formations and processes
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Cryospheric studies and observations
- Marine and environmental studies
- Rock Mechanics and Modeling
- Paleontology and Stratigraphy of Fossils
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- 3D Surveying and Cultural Heritage
- Geotechnical Engineering and Analysis
- Climate change and permafrost
- 3D Modeling in Geospatial Applications
- Pleistocene-Era Hominins and Archaeology
Norwegian Geological Survey
2010-2025
Posten (Norway)
2021
Vrije Universiteit Amsterdam
2004
Arizona State University
1993-1994
Apatite fission track thermochronology (AFTT) on granitic samples collected in the central Alaska Range conjunction with geologic constraints from basins to north (Nenana Basin) and south (Cook Inlet) of range is used constrain timing, amount, rate, pattern surface uplift, rock denudation since late Miocene. The conversion a thermal frame reference (apatite data) an absolute (with respect mean sea level), which requires constraining paleoland elevation, paleomean annual temperature,...
Apatite fission-track analysis of samples that cover a 4-kilometer vertical section from the western flank Denali (Mount McKinley), North America's highest mountain, suggests mountain massif was formed by rapid uplift (> 1 kilometer per million years) beginning approximately 6 years ago (Ma). Uplift result morphology fault and change in motion Pacific plate with respect to America at 5 Ma, which created opposing tangential vectors relative movement along forced intervening crustal blocks upward.
Terra Nova, 23, 349–361, 2011 Abstract The long‐term evolution of kilometre(s) high, seaward‐facing escarpments at passive margins is linked directly to the crustal thinning gradient. development ‘post‐rift’ faults in onshore parts margin and associated distribution drainage patterns, landscape types sediment dispersal patterns reflect this linkage. For seismically well‐imaged Norwegian as well for a number worldwide, we identify scaling relationship that correlates escarpment height with...
Abstract Spectral analysis (SA) for image processing, utilizing the Fast Fourier Transform (FFT), computes 2D power spectrum to capture amplitude of each frequency component an image. Recent studies have applied SA on digital elevation models (DEMs) characterize repetitive and spatially homogeneous landforms in terms their orientation, frequency, amplitude. Here, we advance application by introducing a new preprocessing step appropriate windowing function, tailored analyze heterogenous...
New structural data, published AFT and topographic data suggest that the latest Cretaceous–Cenozoic uplift of western Norway was associated with normal reactivation Møre–Trøndelag Fault Complex. Reactivation focused along base today's rise, maximum displacements in order 2–3 km. Structural indicate occurred a displacement gradient least NE increasing towards SW. commenced connection Triassic to earliest Cretaceous phases rifting on Norwegian margin, probably continued through most Tertiary....
Research Article| November 01, 2007 Escape tectonics and the extrusion of Alaska: Past, present, future T. F. Redfield; Redfield 1Geological Survey Norway, Leiv Eirikssens vei 39, 7491 Trondheim, Norway Search for other works by this author on: GSW Google Scholar David W. Scholl; Scholl 2Department Geophysics, Stanford University, Stanford, California 94035, USA, U.S. Geological Survey, Menlo Park, 94025, USA Paul G. Fitzgerald; Fitzgerald 3Department Earth Sciences, Syracuse Syracuse, New...
The tectonic disintegration of the Caledonian orogen through combined extension, contraction and strike-slip was characterized by spatial temporal strain partitioning a period at least 30 Ma. Early to Mid-Devonian exhumation Central Norway basement window associated with retrograde, top-to-the-SW extensional shearing in Høybakken detachment zone, sinistral along Møre–Trøndelag Fault Complex, formation extension-parallel folds. Progressive led increasing localization transition from ductile...
Research Article| February 01, 2009 Active normal fault control on landscape and rock-slope failure in northern Norway P.T. Osmundsen; Osmundsen 1Geological Survey of Norway, 7491 Trondheim, Search for other works by this author on: GSW Google Scholar I. Henderson; Henderson T.R. Lauknes; Lauknes 2Norut, Forskningsparken, 9294 Tromsø, Y. Larsen; Larsen T.F. Redfield; Redfield J. Dehls Geology (2009) 37 (2): 135–138. https://doi.org/10.1130/G25208A.1 Article history received: 28 May 2008...
Research Article| January 01, 2013 The long-term topographic response of a continent adjacent to hyperextended margin: A case study from Scandinavia T.F. Redfield; Redfield † 1Geological Survey Norway, Leiv Eriksons vei 39, N-7491 Trondheim, Norway †E-mail: tim.redfield@ngu.no Search for other works by this author on: GSW Google Scholar P.T. Osmundsen Norway2Department Arctic Geology, University Centre in Svalbard, N-9171, Longyearbyen, Author and Article Information Publisher: Geological...
Neoproterozoic Rodinia reconstructions associate East Antarctica (EANT) with cratonic Western Australia. By further linking EANT to both Gondwana and Pangea relative plate circuits, a Synthetic Apparent Polar Wander (SAPW) path for is calculated. This predicts that was located at tropical subtropical southerly latitudes from ca. 1 Ga 420 Ma. Around 400 Ma again 320 Ma, underwent southward drift. Ca. 250 voyaged briefly north but headed south 200 Since 75 became surrounded by spreading...
Abstract: Combined with geological information, apatite fission track (AFT) data can impose valid thermal and temporal constraints. However, their uncritical interpretation may also lead to unsupported conclusions. Because tracks in undergo measurable shortening even at surface temperatures, model artefacts potentially be mistaken for cooling events. This problem especially acute when older fanning kinetic models are utilized instead of the newest curvilinear ones. In any circumstances, AFT...
Rifted margins are commonly classified as either magma-rich or magma-poor. Magma-poor often implicitly related to ultraslow–slow extension. Conversely, therefore, should represent more rapid Although supported by numerical modelling, these relationships based on limited data and depend a perhaps spurious comparison between continental spreading ridges. Three case studies from the Atlantic therefore presented here local, no means complete, examination of this concept. Extension rates for...
Abstract: Alpine topography in Norway is largely fault-controlled. Linear and asymmetric ranges developed the footwalls of normal faults that were reactivated after main phase Mesozoic rifting, but prior to Late Cenozoic glaciations. Stark geomorphological contrasts across faults, reflecting differential glacial exploitation pre-glacial drainage pattern. preferentially footwalls. Triangular facets mark traces most recently active faults. At base deeply incised, alpine range-front...
We have created a working tool – named Lithoflex- that is useful for the interpretation of gravity data in oceanic and continental areas. The combines forward inverse calculation with an investigation isostatic state. Density models derived from field are ambiguous if external geological or geophysical constraints scarce unavailable. However, because isostasy physical condition , some native ambiguity can be reduced by checking compatibility density model demonstrate usefulness our analysis...