Evidence for subduction at 3.8 Ga: Geochemistry of arc-like metabasalts from the southern edge of the Isua Supracrustal Belt

• Published in: Chemical Geology
• Main Authors: Jenner, Frances, Bennett, Victoria, Nutman, Allen, Friend, Clark, Norman, Marc, Yaxley, Gregory
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier
• Subjects: Keywords: Archean; chemical composition; igneous geochemistry; magma chemistry; mantle source; metabasalt; subduction; Arctic; Greenland; Isua Greenstone Belt Eoarchean; Island arc basalts; Isua Supracrustal Belt
• Online Access: http://hdl.handle.net/1885/38488; https://doi.org/10.1016/j.chemgeo.2008.09.016; https://openresearch-repository.anu.edu.au/bitstream/1885/38488/5/Jenner_et_al_RSES_Evidence_for_subduction.pdf.jpg; https://openresearch-repository.anu.edu.au/bitstream/1885/38488/7/01_Jenner_Evidence_for_subduction_at_3.8_2009.pdf.jpg

We present new major and trace element data for rare examples of preserved pillow basalts from a locality of little studied > 3800 Ma rocks at the southwestern edge of the Isua Supracrustal Belt (ISB), West Greenland. The 20 samples have 47.3-59.0 wt.%