Abstract
The Archaean gneiss block of Greenland is made up of gneisses, amphibolites, anorthositic rocks and minor supracrustals. It contains the oldest crustal rocks yet recorded on earth. The Archaean gneiss block is bordered to the north and to the south by Proterozoic mobile belts. The Nagssugtoqidian and Rinkian mobile belts to the north, differentiated on the basis of differences in the tectonic development, consist mainly of reworked Archaean rocks. Early Proterozoic supracrustal rocks are prominent in the Rinkian mobile belt, where they overlie the Archaean basement. The Ketilidian mobile belt to the south consists mainly of Proterozoic supracrustal rocks and granites. After renewed denudation late Proterozoic supracrustal rocks were deposited in North and South Greenland where they are associated with large amounts of late Proterozoic intrusive rocks.
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