Deformation of the Onaping Formation in the NE-lobe of the Sudbury Igneous Complex, Canada: Evidence for fold adjustment flow in the core of a km-scale fold
Klimczak, Christian
Riller, Ulrich
Universitätsverlag Göttingen
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Klimczak, Christian; Riller, Ulrich, 2006: Deformation of the Onaping Formation in the NE-lobe of the Sudbury Igneous Complex, Canada: Evidence for fold adjustment flow in the core of a km-scale fold. In: Philipp, S.; Leiss, B; Vollbrecht, A.; Tanner, D.; Gudmundsson, A. (eds.): 11. Symposium "Tektonik, Struktur- und Kristallingeologie"; 2006, Univ.-Verl. Göttingen, p. 111 - 112., DOI: 10.23689/fidgeo-1863.
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The synformal geometry of the 1.85Ga
Sudbury Igneous Complex (SIC), an impact
melt sheet resulting from largemagnitude
meteorite impact, attests to
post-impact deformation. However, in
contrast to the overlying Onaping Formation,
a heterolithic impact melt breccia,
the SIC shows little evidence for
pervasive ductile strain. This pertains
in particular to its NE-lobe characterized
by a curvature of about 100° in
plain view. This curvature has been interpreted
either as a fold or as a primary
feature. In order to test these scenarios,
a detailed structural analysis was conducted
in the core of the NE-lobe, which
consists of rocks of the Onaping Formation...