Abstract
Abstract The Kjukkelen area in the B⊘rgefjellet National Park occupies a key position concerning the tectonostratigraphical relationship between the K⊘li Nappes north and south of the B⊘rgefjellet Window (BW). The thickness of the K⊘li Nappes between the rock units of the BW and the overlying Helgeland Nappe Complex (HNC) is locally reduced to 75 m in the Kjukkelen area. Several K⊘li Nappes (Stikke, Gelvenakko and Leipikvattnet N.) consisting of R⊘yrvik Group lithologies wedge out along the southwestern margin of the BW. Only the Gjersvik Nappe consisting of Limingen Group lithologies enters the narrow passage between the BW and the HNC. North of the passage, K⊘li lithologies belong to the R⊘yrvik Group. It is uncertain, which nappe unit they can be correlated with. Rocks belonging to the Limingen Group reappear further north in the Jofjallet Nappe which attenuates southward beneath the HNC. Investigations in the Kjukkelen area show that the Jofjallet Nappe appears at the tectonostratigraphic level of the...
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