Blar i NGU Open Archive på forfatter "Hjelle, Audun"

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    • Forsøk på kromatografisk bestemmelse av (ca.Mg)-karbonater. 

      Hjelle, Audun (NGU (213), Journal article, 1961)
      A brief description of a chromatographic method to determine the approximate Ca and Mg content of (Ca, Mg) carbonates is given.

    • Grunnfjellet omkring Tangen, østsiden av Mjøsa. 

      Hjelle, Audun (NGU (211), Journal article, 1960)
      Petrographic and structural investigations were made in a Precambrian area east of lake Mjøsa, southern Norway. The rocks, mainly granitic and dioritic, are mostly mylonitised and brecciated. Some of the fault zones are ...

    • Kullblendeførende breksje ved Hof, Solør. 

      Hjelle, Audun; Bryn, Knut Ørn (NGU (213), Journal article, 1961)
      The breccia has possibly connection with the Permian faults in Rendalen, farther north, and the coal blend is probably derived from the dark Cambrian shale, once deposited on the Precambrian peneplane. A number of minerals ...

    • Noen observasjoner fra grunnfjellsområdet mellom Randafjorden og svenskegrensen. 

      Hjelle, Audun (NGU (223), Journal article, 1963)
      Precambrian rocks from the area west and east of Mjøsa, South Norway, are described, and modal analyses presented. The main regional divisions are from west to east: Grey plagioclase gneisses, the main granite-mylonite ...