Archean and Paleoproterozoic cratonic rocks of Baffin Island ...

• Main Authors: St-Onge, MR, Scott, DJ, Rayner, N, Sanborn-Barrie, M, Skipton, DR, Saumur, BM, Wodicka, N, Weller, OM
• Format: Article in Journal/Newspaper
• Language: English
• Published: Natural Resources Canada/CMSS/Information Management 2020
• Subjects: Baffin Island; Baffin; Cumberland Peninsula; Hoare Bay
• Online Access: https://dx.doi.org/10.17863/cam.53076; https://www.repository.cam.ac.uk/handle/1810/305998

Archean and Paleoproterozoic cratonic rocks of Baffin Island define four stacked structural levels that are juxtaposed within the middle Paleoproterozoic Trans-Hudson Orogen. From north to south, and highest to lowest structural level, these comprise:1) the Archean Rae Craton, unconformably overlain along its southern margin by middle Paleoproterozoic supracrustal cover (Piling Group) and stratigraphically similar units of the Hoare Bay Group on Cumberland Peninsula; 2) Archean to middle Paleoproterozoic metaplutonic units and middle Paleoproterozoic metasedimentary cover (Lake Harbour Group), collectively termed the 'Meta Incognita microcontinent'; 3) middle Paleoproterozoic orthogneiss, interpreted as a deformed arc-magmatic terrane (Narsajuaq terrane) or alternatively as Narsajuaq-age intrusions emplaced in the Meta Incognita microcontinent; and 4) Archean orthogneiss, interpreted as the northern continuation of the lower-plate Superior Craton, and associated middle Paleoproterozoic continental-margin ...