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Earth's oldest mantle fabrics indicate Eoarchaean subduction

Kaczmarek, Mary-Alix; Reddy, Steven M.; Nutman, Allen P.; Friend, C R L; Bennett, Victoria


The extension of subduction processes into the Eoarchaean era (4.0–3.6 Ga) is controversial. The oldest reported terrestrial olivine, from two dunite lenses within the ~3,720 Ma Isua supracrustal belt in Greenland, record a shape-preferred orientation of olivine crystals defining a weak foliation and a well-defined lattice-preferred orientation (LPO). [001] parallel to the maximum finite elongation direction and (010) perpendicular to the foliation plane define a B-type LPO. In the modern Earth...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
Source: Nature Communications
DOI: 10.1038/ncomms10665
Access Rights: Open Access


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