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~3,850 Ma tonalites in the Nuuk region, Greenland: geochemistry and their reworking within an Eoarchaean gneiss complex

Nutman, Allen; Bennett, Victoria; Friend, Clark; Horie, Kenji; Hidaka, Hiroshi


The Eoarchaean (>3,600 Ma) Itsaq Gneiss Complex of southern West Greenland is dominated by polyphase orthogneisses with a complex Archaean tectonothermal history. Some of the orthogneisses have c. 3,850 Ma zircons, and they vary from rare single phase metatonalites to more common complexly banded migmatites. This is due to heterogeneous strain, in situ anatexis and granitic veining superimposed during younger tectonothermal events. In the single-phase tonalites with c. 3,850 Ma zircon,...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Contributions to Mineralogy and Petrology (Electronic)
DOI: 10.1007/s00410-007-0199-3


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