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Seminar - Ancient impacts, early life, and gemstones: Insights into the Archean Eon from southern West Greenland
Speaker: Dr. Chris Yakymchuk - Waterloo University (Canada) | Thursday, November, 9, 2023 – 4.30 PM | Arduino Classroom
09.11.2023
The Akia Terrane of southern West Greenland hosts several peculiar geological features that record a transitional period in global geodynamics during the Archean Eon. The terrane is dominated by grey gneisses, metasedimentary rocks, and ultramafic complexes metamorphosed to granulite‐facies conditions. In the northern Akia Terrane, microstructures and structural map patterns have been used to argue that the ~100 km wide Maniitsoq structure formed from a giant meteorite impact at 3.0 Ga; however, diagnostic evidence of impact metamorphism is absent.