The geochronology of the Scoresby Sund area Progress report 2: Rb/Sr mineral ages

Abstract

The reconnaissance age determination programme started at the "Institute für Kristallographie und Petrographie" of the "Eidg. Technische Hochschule" in Zürich has been continued. To verify the pre-Caledonian ages found last year in the Stauning Alper, additional minerals were analysed from some of the previously dated rock samples. The results on these, and on a group of other samples, clearly confirm the presence of extensive Precambrian rock units within the Caledonian fold belt. In table 6 the rocks are subdivided into four main groups on the basis of their geological relations.