The stratigraphy of the Fiskenæsset anorthosite complex

Abstract

In the Fiskenæsset region metamorphosed anorthosites occur as conformable layers up to about 2 km thick in high-grade gneisses. It has been found that within the layers there is a well preserved primary stratigraphy which can be followed persistently along the strike on Qeqertarssuatsiaq, west and east Taseq and the south side of Fiskenæsfjorden, a distance of at least 60 km. Because of tectonic thinning of layers, especially in fold limbs, and to a lesser extent because of primary lateral variations, any one traverse across the complex may display an incomplete stratigraphic section. By taking these variations into consideration the following maximum, composite stratigraphy has been found.