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Title: | Metamorphism, Structure, and Techtonics of the Eastern Cape Smith Belt, Northern Quebe |
Authors: | Scott, David J. |
Advisor: | McNutt, R.M. |
Department: | Geology |
Publication Date: | Apr-1986 |
Abstract: | <p>The Cape Smith Belt of northernmost Quebec is a sedimentary/ volcanic belt at the boundary of the dominantly gneissic Churchill and Superior structural provinces.</p> <p>Within the Belt, three distinct phases of deformation and a metamorphic culmination are evident. Thrusting and imbrication of Belt rocks lead to the thermal culmination, a pattern similar to numerous Fold-Thrust Belts, including the eastern Alps. This is followed by an episode of coaxial folding. A late cross-folding event provides up to 12km of structural relief in the study area, at the eastern end of the Belt.</p> <p>Metamorphism in the study area is of the hot-side-down Barrovian type. A systematic progression is seen from lower-greenschist to mid-amphibolite facies, from west to northeast across the study area. Minimum temperatures of 575°C and pressures of 5.5 kbar are suggested by the highest grade assemblages in pelitic rocks in the northeastern corner of the Belt.</p> <p>Shallow-water ironstone and carbonate, deeper water siliciclastics, and rift volcanics are present stratigraphically from bottom to top. Restored to a pre-deformation state, this sequence is believed to represent a transition from passive margin to crustal rifting, from on- to off-shore, subsequently imbricated during collision of two crustal blocks. The rocks of the Belt are allochthonous, with the exception of those on the southern margin, having been thrusted southward onto the Superior craton during imbrication.</p> <p>These findings are consistent with the current tectonic model for this area.</p> |
Description: | Title: Metamorphism, Structure, and Tectonics of the Eastern Cape Smith Belt, Northern Quebec, Author: David J. Scott, Location: Thode |
URI: | http://hdl.handle.net/11375/19838 |
Appears in Collections: | Bachelor theses |
Files in This Item:
File | Description | Size | Format | |
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Scott_Dave_J_1986_04_bachelor.pdf | Title: Metamorphism, Structure, and Tectonics of the Eastern Cape Smith Belt, Northern Quebec, Author: David J. Scott, Location: Thode | 28.69 MB | Adobe PDF | View/Open |
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