The geochronology of the Scoresby Sund area Progress report 5: K/Ar mineral ages

To supplement the reconnaissance age determination programme carried out at the Institute flir Kristallographie und Petrographie of the Eidg. Technische Hochschule in Zurich, a number of K/Ar determinations have been made. This method is particularly useful for dating minerals from more basic rocks that are not suited for Rb/Sr age work and for cross-checking some of the previous results obtained by other methods (Hansen & Steiger, 1971; Hansen et al., 1972; Steiger & Henriksen, 1972). In table 2 the samples dated are subdivided in four main groups on the basis of their geological relations.