Lyal Harris

Authors: Harris, L.B. & Bédard, J.H.
Title: SCLM rifting and regional shearing in the N American Superior Craton − Implications for deformation, mineralization, and tectonic reconstructions.
Abstract: Poster to accompany the talk by Harris & Bédard at the Structural & Tectonics Forum.

A symmetrical rift in the sub-continental lithospheric mantle (SCLM) is portrayed for the Abitibi Subprovince of the Superior Craton. Gravity and aeromagnetic images portray regional structures interpreted to have formed during indentation of the o N Superior Craton in response to mantle flow acting upon its deep lithospheric keel, and not subduction-related processes. Early rift structures localized ca. 2696 Ma deformation and hydrothermal fluid flow and younger kimberlite emplacement. Correlations are made with the Baltic Belomorian Province.
References: Abstract:

Research presented in this poster is published in:
Harris, L.B., Bédard, J.H. (2014a) Crustal evolution and deformation in a non-plate tectonic Archaean Earth: Comparisons with Venus. In: Dilek Y, Furnes H (Eds), Evolution of Archean Crust and Early Life, Modern Approaches in Solid Earth Sciences 7, Springer, Chapter 9, 215-288. ISBN 978-94-007-7614-2 & ISBN 978-94-007-7615-9 (eBook)

Related publications:
Bédard, J.H., Harris, L.B., Thurston, P. (2013) The hunting of the snArc. Precamb. Res. 229: 20–48

Dufréchou, G., Harris, L.B. (2013). Tectonic models for the origin of regional transverse structures in the SW Grenville Province interpreted from regional gravity. J. Geodynamics 64, 15-39, doi: 10.1016/j.jog.2012.12.001

Harris, L.B & Bédard, J.H. (2014b) Interactions between continent-like 'drift', rifting, and mantle flow on Venus ‒ gravity interpretations and Earth analogues. In: Platz, T., Massironi, M., Byrne, P., & Hiesinger, H. (Eds), Volcanism and Tectonism Across the Inner Solar System. Geological Society of London Special Publication 401, doi: 10.1144/SP401.9

Author's webpage:
Harris & Bédard Structural & tectonics forum poster. (Acrobat (PDF) 5.8MB Jun13 14)