Project SUPRASYD 1994 - Ketilidian supracrustal rocks in South-East Greenland and gold- bearing shear zones in the Julianehåb batholith

A.A Garde,H.K Schønwandt

doi:10.34194/rapggu.v165.8279

Abstract

The SUPRASYD project is a reassessment of the geotectonic setting and mineral potential of the Lower Proterozoic Ketilidian orogenic belt in southern Greenland (previously described by Allaart, 1976 and Kalsbeek et al., 1990), and in particular its supracrustal rocks. During the first field season in 1992 a geological and geochemical reconnaissance programme was carried out in South-East Greenland between approximately latitudes 60° to 62° N, mainly in areas with supracrustal rocks (Steenfelt et al., 1992; Nielsen et al., 1993; Chadwick et al., 1994a). The second season in 1993 focused on the southern part of the Julianehab batholith on the west coast of South Greenland, as well as on shear zones with spatially associated gold mineralisation (Garde & Schonwandt, 1994; Chadwick et al., 1994b; Stendal et al., in press). Field work from the early 1960s was re-evaluated and supplemented with new mapping with the aim of compilation of the 1: 100 000 scale map sheet 60 V.3, Sondre Sermilik.

Highlights

The SUPRASYD project is a reassessment of the geo tectonic setting and mineral potential of the Lower Proter ozoic Ketilidian orogenic belt in southern Greenland, and in particular its supracrustal rocks
That between Kangerluluk and Lindenow Fjord in South-East Green land, and the area around S0ndre Sermilik on the west coast of South Greenland (Fig. 1). In the former region systematic mapping of the area covered by the map sheet Lindenow Fjord 60 0.1 was initiated, and in the latter field work for the S0ndre Sermilik map sheet was completed
New interpreta tions of the Julianehab batholith and associated major shear zones in the west arising from field work in 1993 indicated the need for further work in the eastern part of the orogen