Abstract
Archaean rocks have been recognised over most of Greenland, but it is not clear whether they once formed one coherent continental unit or whether they represent a number of originally dispersed smaller ‘continents’. Over much of Greenland the Archaean rocks were strongly affected by Proterozoic deformation and metamorphism, and Proterozoic intrusive complexes occur locally. Pb-isotope studies of the latter, in combination with Rb-Sr isotopic information, are used to see whether or not the rocks have been contaminated by components derived from Archaean crustal material at depth. Where no contamination is detectable this may indicate the presence of ancient plate margins.
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Kalsbeek, F., Taylor, P.N. (1985). Pb-Isotopic Studies of Proterozoic Igneous Rocks, West Greenland, with Implications on the Evolution of the Greenland Shield. In: Tobi, A.C., Touret, J.L.R. (eds) The Deep Proterozoic Crust in the North Atlantic Provinces. NATO ASI Series, vol 158. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5450-2_14
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DOI: https://doi.org/10.1007/978-94-009-5450-2_14
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