00000nam 2200000zi 4500 9.934429 CaOODSP 20251031142449 m o d f cr cn||||||||| 240223t20242024oncdb ob f000 0 eng d 9780660704470 CaOODSP eng rda CaOODSP n-cn--- M183-2/8756E-PDF Snyder, D. B., author. 3-D mantle structure of the Superior craton / D.B. Snyder, A. Vaillancourt, B.A. Kjarsgaard, G. Savard, and E.A. de Kemp. [Ottawa] : Geological Survey of Canada, 2024. ©2024 1 online resource (16 pages) : charts, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file, 2816-7155 ; 8756 Includes bibliographical references (pages 13-15). "New 3D multi-azimuthal receiver function analysis identified four regional seismic discontinuities dipping at 7–13° within the mantle of the Superior craton of North America; most are discordant to known major upper crustal structures. Widely observed crustal-scale structures with near vertical axial planes striking east-west indicate that the most recent and dominant phase of folding and horizontal shortening strain occurred during the Kenoran (D2) crustal deformation concurrent with Au mineralization and peak metamorphism at 2.72–2.66 Ga. Two mantle discontinuities strike 065° and 249°, dipping to the southeast and northwest, respectively. These strike roughly parallel the northern margin of the Superior craton and some intra-cratonic features such as the axis of the Quetico Basin"--Abstract, page 1. Cratons Canada. Cratons Canada. Canadian Shield. Bouclier canadien. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 2816-7155 ; 8756. (CaOODSP)9.506878 PDF 10.80 MB https://publications.gc.ca/collections/collection_2024/rncan-nrcan/m183-2/M183-2-8756-eng.pdf HTML N/A https://doi.org/10.4095/p8zz9che61