Circa 1.9 Ga Rae‐Hearne collision from Lu–Hf garnet chronology in eclogites
J. A. Cutts,
D. Regis,
S. J. Pehrsson
et al.
Abstract:Canada's northern cratons record a complex poly‐metamorphic evolution in response to multiple orogenic events. The Snowbird Tectonic Zone (STZ), the principal suture between the Archean Rae and Hearne cratons, is a highly debated structure; it is argued to have accommodated modern‐style accretion in either the Neoarchean (2.6–2.5 Ga) or Palaeoproterozoic (ca. 1.9 Ga). To resolve this controversy, we use Lu–Hf garnet geochronology to date an eclogite collected from the East Athabasca mylonite triangle of the ST… Show more
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