During the past decade the Geological Survey of Denmark and Greenland (GEUS) has carried out two major resource evaluations in the Precambrian basement terranes of South and West Greenland in order to locate potential areas of mine-ral deposits (Steenfelt et al. 2000, 2004; Stendal & Schøn-wandt...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.496.5857 http://www.geus.dk/publications/bull/nr7/nr7_p61-64.pdf |
| Summary: | During the past decade the Geological Survey of Denmark and Greenland (GEUS) has carried out two major resource evaluations in the Precambrian basement terranes of South and West Greenland in order to locate potential areas of mine-ral deposits (Steenfelt et al. 2000, 2004; Stendal & Schøn-wandt 2003; Stendal et al. 2004). Based on geological field work and geochemical and geophysical data, these evalua-tions have assessed the interplay between the magmatic, tec-tonic and metamorphic evolution in the study areas and their mineralising events. As a result of the second of these evaluations it is now pos-sible to outline a succession of mineralising events in the northern part of the Nagssugtoqidian orogen and in the Disko Bugt area of central West Greenland (Fig. 1), and relate them to the general Archaean and Palaeoproterozoic geological evolution of this region. However, uncertainties still exist concerning the age and detailed setting of many epi-genetic mineralisations. Geological background The Precambrian rocks of central West Greenland north of the North Atlantic craton, consist of Archaean orthogneisses and supracrustal rocks together with localised belts of juve-nile Palaeoproterozoic intrusive complexes and supracrustal rocks. The whole region was reworked to varying degrees during a major Palaeoproterozoic orogenic event. In West Greenland the Palaeoproterozoic has traditionally been di-vided into the Nagssugtoqidian orogen between Kangerlus-suaq and Disko Bugt (Fig. 1) and the Rinkian fold belt farther north. However, more recent studies suggest that these two belts are largely contemporaneous and probably Precambrian mineralising events in central West |
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