Zircon within chromitite requires revision of the tectonic history of the Eoarchean Itsaq Gneiss complex, Greenland

• Published in: Geoscience Frontiers
• Main Authors: Hikaru Sawada, Tomoaki Morishita, Adrien Vezinet, Richard Stern, Kenichiro Tani, Ikuya Nishio, Kanta Takahashi, D. Graham Pearson, Kristoffer Szilas
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2023
• Subjects: Archean; Itsaq gneiss complex; Ultramafic rock; Metasomatism; Geology; QE1-996.5; Greenland; Ujaragssuit
• Online Access: https://doi.org/10.1016/j.gsf.2023.101648; https://doaj.org/article/691bd4c32a33442e86f6cc1b245bcabf

The Ujaragssuit Nunât layered (UNL) unit in the Itsaq Gneiss Complex, west Greenland, has been considered to contain one of the oldest chromitites on Earth based on ∼ ca. 4.1 Ga Hadean whole rock Pt–Os model ages and ca. 3.81 Ga zircon U-Pb age of the surrounding orthogneiss. This study obtained zir...