DANISH MINISTRY OF THE ENVIRONMENT

• Main Authors: Jeroen A. M. Van Gool, Mogens Marker
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Nagssugtoqidian orogen; Palaeoproterozoic; Archaean; metamorphism; deformation; collisional tectonics; zircon geochronology; economic potential; Nordre Isortoq; Ussuit; Isortoq
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.624.1469; http://www.geus.dk/publications/maps/map3_p1-40.pdf

Extract of the eastern part of the Ussuit map sheet showing the eastern part of the Nordre Isortoq steep belt which disappears underneath the Inland Ice. The rocks in this belt are dominated by Palaeoproterozoic garnet-biotite schists and gneisses with minor quartzite, quartz-dioritic gneiss, amphibolite and lenses of ultrabasic rock. This is the thickest continuous occurrence of metasedimentary rocks in the map area. The Nordre Isortoq steep belt is bound to the north and west by Archaean orthogneisses, including thin sheets of both Palaeopro-terozoic and Archaean supracrustal rocks. Frontispiece: facing page Layered amphibolite at the western end of the lake Ikorfiit Tasiat, in the south-western corner of the map area. The hills in the back-