Western Superior Province

Percival, J., McNicoll, V., Bailee, A. 2006. Strike-slip Juxtaposition of ca. 2.72 Ga Juvenile arc and >2.98 Ga continent margin sequences and its implications for Archean terrane accretion, western Superior Province, Canada. Canadian Journal of Earth Sciences, 43, 895-927. 

Tomlinson K. Y., Hughes D. 1., Thurston P. C., and Hall R. P. (1999) Plume magmatism and crustal growth at 2.9 to 3.0 Ga in the Steep Rock and Lumby Lake area. Western Superior Province. Lithos 46, 103-136. 

Seismic heterogeneity and anisotropy in the Western Superior Province, Canada insights into the evolution of an Archaean craton... 

F. 1. Map of the Western Superior Province (WSP). O, locations of the broadband seismic stations of the TWiST experiment, and of the two permanent CNSN stations, ULM and FCC. The dashed line marks the border between the Archaean Superior Province and the Proterozoic Trans-Hudson Orogen. 

Here we present highlights from a seismo-logical investigation of the upper mantle beneath the Western Superior Province. The Teleseismic Western Superior Transect (TWiST) is a component of the Canadian Lithoprobe Western Superior Transect (Lithoprobe phase V proposal Clowes 1997). Between May and November 1997, nearly 1100 teleseismic events were recorded by an array of 14 broadband (BB) three-component instruments, deployed along a 600 km... 

A variety of seismic techniques have been used to study the upper mantle beneath the Western Superior Province. Each technique has its own advantages and disadvantages, but often one technique compensates for another s deficiency. For example, SKS-splitting analysis has poor vertical resolution but good lateral resolution, whereas surface-wave studies have poor lateral resolution but better vertical resolution. 

Fig. 13. Schematic representation of the upper mantle beneath the Western Superior Province. Lined or hatched regions mark high velocities L indicates low-velocity region KEW refers to region potentially affected by Keweenawan rifting. Arrows show potential regions of localized flow aroimd and below the tectosphere.

Corfu, F. Davis, D. W. 1992. A U-Pb geochrono-logical framework for the western Superior Province, Ontario. In Thurston, P. C. et al. (eds) Geology of Ontario, Special Volume 4, Part 2, Ontario Geological Survey, Toronto, 1334-1348. 

Musacchio, G., Thomson, C. J., White, D. J. Asudeh, I. 1999. the upper 100 km of the lithosphere within an Archean terrane hints from the western Superior Province. Journal of Conference Abstracts, 4(1), 150. 

Snell, C. S. 1999. Surface wave analysis of upper mantle velocity structure. Western Superior Province, Canada. MGeophy thesis. University of Leeds. 

White, D., Helmstaedt, H. H., Harrap, R. M. Thurston, P. 2000. Crustal sutures preserved in the Western Superior Province evidence from deep seismic profiling. In Harrap, R. M. Helmstaedt, H. H. (eds) Western Superior Transect Sixth Annual Workshop, Lithoprobe Report 77. Lithoprobe Secretariat, University of British Columbia, Vancouver, B.C., 155. 

White, D. J., Mussachio, G., Sol, S. Lithoprobe Western Superior Working Group 2001. Evidence for subduction processes and terrane accretion in the Archean Western Superior Province, Canada results from combined LITHOPROBE deep seismic studies. In Cassidy, K. F., Dunphy, J. M. VAN Kranendonk, M. J. (eds) 4th International Archaean Symposium, 24-28 September 2001, Extended Abstracts. AGSO-Geoscience Australia, Record, 2001/37, 539. 

Henry, P., Stevenson, R.K., and Gariepy, C., 1998, Late Archaean mantle composition and crustal growth in the western Superior Province of Canada neodymium and lead isotopic evidence from the Wawa, Quetico and Wabigood subprovinces. Geochim. Cosmochim. Acta, 62, 143-57. 

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