NGU Report 2012.005 Tropical Weathering in Norway, TWIN Final
NGU Report 2012.005 Tropical Weathering in Norway, TWIN Final Report 2 Geological Survey of Norway NO-7491 Trondheim, Norway REPORT Tel.: 47 73 90 40 11 Telefax: 47 73 92 16 20 Report no.: 2012.005 ISSN 0800-3416 Grading: Open Title: Tropical Weathering In Norway, TWIN Final Report Authors: Client: Odleiv Olesen, Dag Bering, Marco Brönner, Einar Dalsegg, Karl Fabian, Ola Geological Survey of Norway Fredin, Jomar Gellein, Berit Husteli, Christian Magnus, Jan Steinar Rønning, and Norwegian Petroleum Terje Solbakk, Jan Fredrik Tønnesen & Jon Arne Øverland Directorate County: Commune: Vestfold, Vest-Agder, Sogn & Fjordane, Nord-Trøndelag, Nordland, Finnmark Map-sheet name (M=1:250.000) Number of pages: 188 Skien, Mandal, Florø, Ulsteinvik, Trondheim, Svolvær, Andøya Price (NOK): 645,- Fieldwork carried out: Date of report: Project no.: Person responsible: 2009-2011 02.05.2012 3307.00 Summary: The Geological Survey of Norway and the Norwegian Petroleum Directorate established the TWIN Project (Tropical Weathering In Norway) in 2009 to improve the understanding of deep weathering on mainland Norway as well as offshore. All known reports of deep weathering in Norway have been reviewed and registered in a GIS database. We have selected four representative locations for more detailed studies in southern Norway (Kjose, Lista, Vågsøy-Stad and Inderøya) and another four locations in northern Norway (Vestvågøya, Hadseløya, Andøya and Hamarøya). Geophysical studies (2D resisitivity and refraction seismic) reveal fairly continuous saprolite layers with a thickness up to 100 metres in Vestfold (Kjose), Lofoten- Vesterålen, Hamarøya and Varangerhalvøya. The results also show that the degree of weathering varies extensively over short distances.
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