Blar i NTNU Open på forfatter "Ofstad, Frode"
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The graphite occurrences of Northern Norway, a review of geology, geophysics, and resources
Gautneb, Håvard; Rønning, Jan Steinar; Engvik, Ane; Henderson, Iain; Larsen, Bjørn Eskil; Solberg, Janja Knezevic; Ofstad, Frode; Gellein, Jomar; Elvebakk, Harald Kristian; Davidsen, Børre (Peer reviewed; Journal article, 2020)There are three provinces in Northern Norway in which occurrences of graphite are abundant; the Island of Senja, the Vesterålen archipelago, and the Holandsfjorden area. From these provinces, we report graphite resources ... -
Rock-avalanche deposit causes extreme high indoor radon concentrations in Kinsarvik, Ullensvang municipality, Western Norway
Rønning, Jan Steinar; Böhme, Martina; Fredin, Ola; Hansen, Anna Louise Alhed; Hermanns, Reginald Leonhard Manfred; Ofstad, Frode; Penna, Ivanna Marina; Solli, Arne; Høst, Jan (Peer reviewed; Journal article, 2023)The radon problem in Kinsarvik, Ullensvang municipality in Western Norway, is among the most severe in the world. Annual average indoor radon concentrations as high as 56,000 Bq/m3 have been measured. The problem affects ...