Dolomite marble potential in the Ofotenfjord area
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This report will show the results obtained within the co-operative project concerning the dolomite marble potential in the Ofotensjord area. The main objectives were to find dolostones which may be used in the industry as an industrial mineral. The entirely tectono-stratigraphic section of the area only two from three marble sequences are known to contain the major developments of the dolomite marbles. These are the Evenes and Hekkelstrand Marble. Two major units of dolomite marble have been documented in the Evenes Marble. One is near the structural base of the group, other is in the upper part of the Evenes Marble sequence. Based on the limited mapping seven localities of dolomite marble have been selected in the Ofotenfjord area. Four occurrences of dolomite marble out of seven studied may be considered for future follow-up work. These are the dolomite marbles exposed at Ramstad, Sinklia, Skårnesdalen and Tjeldsundet. The Skårnesdalen occurrence is located in the Hekkelstrand Marble whereas the other three are a part of the Evenes Marble sequence. If all factors are con- sidered (geographic location, accessibility, possible volume, quality, extraction) the Ramstad occurrence is considered to have the highest potential. The final assessment should include detail mapping of a limited area in order to evaluate the volume and distribution of different quality dolomite marbles.