Browsing NGU Open Archive by Author "Torsvik, Trond H."

Now showing items 1-14 of 14

    • Aeromagnetic and gravimetric interpretation of regional structural features in the Caledonides of West Finnmark and North Troms, Northern Norway. 

      Olesen, Odleiv; Torsvik, Trond H.; Lile, Ole Bernt; Henkel, Herbert; Roberts, David (NGU Bulletin (419), Journal article, 1990)
      Forkortet.Interpretation of aeromagnetic and gravity data from Finnmark and North Tromshas resulted in a new map of depth to Precambrian basement. The integratedinterpretation of the data shows that the Seiland Igneous ...

    • GDEPTH - Gravity inversion and calculation of basement depths 

      Fichler, C.; Torsvik, Trond H. (NGU-Rapport (93.066), Report, 1993)
      GDEPTH is a gravity inversion program that estimates the basement topography or a density surface at a given depth and a given density contrast across the surface. The IBM-PC compatible program is most applicable to determine ...

    • IMP - Interactive Modelling of Potential Field Data (Release 5) 

      Torsvik, Trond H. (NGU-Rapport (92.305), Report, 1992)
      IMP is an interactive, user-friendly, and pseudo 3D modelling program for magnetic and gravity data, and it forms a key-element in the IMP system developed over a total of 4 years. IMP is a forward modelling program which ...

    • IMPATLAS - Geographic database and map-generating system. 

      Torsvik, Trond H. (NGU-Rapport (92.223), Report, 1992)
      IMPATLAS is a PC based database management system which handles approximately 3 Mbyte of geographic vector-data (X-Y data), including the Norwegian coastline, islands, rivers, lakes, roads, country-boundaries and petrophysical ...

    • IMPPET - Petrophysical database system 

      Torsvik, Trond H.; Olesen, Odleiv (NGU-Rapport (92.275), Report, 1992)
      IMPPET is a database program for the IBM-PC which can perform all of the basic processing and plotting tasks usually associated with the storage and presentation of petrophysical data. IMPPET is menudriven and easy to use. ...

    • IMPPROF - Magnetic and Gravity Profile Database 

      Torsvik, Trond H.; Olesen, Odleiv (NGU-Rapport (93.065), Report, 1993)
      IMPPROF is an interactive database system for storage and manipulation of magnetic and gravity profiles. Profiles can be displayed together with gridded image files and\/or geographic vector data. The system principally ...

    • IMPRINT: A print-driver program 

      Torsvik, Trond H. (NGU-Rapport (92.304), Report, 1992)
      IMPRINT is a print-driver program which can handle plot-files generated with the IMP system. Almost any graphical output device can be used due to the implementation of the HALO Graphic Kernel System. This report is a ...

    • Interpretation of the Ra 3 potential field data along the Lofoten-Vøring continental margin, part 2. 

      Ebbing, Jörg; Skilbrei, Jan Reidar; Olesen, Odleiv; Torsvik, Trond H.; Smethurst, Mark A.; Lundin, Erik (NGU-Rapport (2004.027), Report, 2004)
      Aeromagnetic data from the Røst Basin (RAS-03) were acquired in 2003 and merged with 12 neighbouring datasets. A compilation of the existing gravity data in the area has also been carried out. Forward 3D modelling along ...

    • NGU GEOCHRON: Database and analysis package for Norwegian isotope geochronology 

      Torsvik, Trond H.; Eide, Elizabeth A. (NGU-Rapport (98.003), Report, 1998)
      Isotope geochronologic data analysis is an integral aspect of nearly every type of tectonic study. However, no regional compilation of Norwegian geo- chronologic data has been assembled since 1986 (Kullerud and co-workers ...

    • Onshore dating of Late Paleozoic through Mesozoic activities on the eastern and western proto-North Atlantic margins 

      Eide, Elizabeth A.; Torsvik, Trond H. (NGU-Rapport (98.004), Report, 1998)
      This report compiles results from six separate studies linked by the common fact that they address absolute dating of initiation and reactivation of brittle faults, dike emplacement and regional unroofing around the Rift ...

    • Palaeomagnetic dating of fault rocks from Vesterålen, Senja and Troms. Preliminary data 

      Torsvik, Trond H.; Olesen, Odleiv (NGU-Rapport (93.088), Report, 1993)
      A preliminary palaeomagnetic study has been carried out in Vesterålen, Senja and Kvaløya (Troms) in order to furnish temporal constraints on near offshore fault-activity in the Lofoten area. At Senja, two phases of faulting ...

    • PDEPTH: Calculation of depth to magnetic basement from profile data. 

      Torsvik, Trond H.; Olesen, Odleiv (NGU-Rapport (92.212), Report, 1992)
      PDEPTH is a program for automatic calculation of depth to magnetic basement based on a total magnetic field or anomaly profile, and PDEPTH forms an inte- grated part of the IMP system developed by T.H.Torsvik. PDEPTH ...

    • Phanerozoic palaeogeography and geodynamics with Atlantic details 

      Eide, Elizabeth A.; Torsvik, Trond H. (NGU-Rapport (98.001), Report, 1998)
      In this report we synthesize palaeogeographic reconstructions over the last 500 million years. These reconstructions are global and should be regarded as first-order approximations. Reconstructions are essentially derived ...

    • The Mjølnir impact structure in time and space 

      Werner, Stephanie C.; Torsvik, Trond H. (NGU-Rapport (2009.017), Report, 2009)
      The Mjølnir impact crater was discovered in seismic reflection data in the 1990's and the detailed structure is well established. The submarine crater, situated in the southwestern Barents Sea, is believed to have a crater ...