The Acasta Gneiss – a Hadean cratonic nucleus

Peter Sprung1, Erik E Scherer2, Alessandro Maltese3, Rebecca Bast2, Wouter Bleeker4 and Klaus Mezger3, (1)University of Cologne, Institute of Geological Sciences, Cologne, Germany, (2)University of Münster, Münster, Germany, (3)University of Bern, Bern, Switzerland, (4)Geological Survey of Canada, Ottawa, ON, Canada
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