Structure of the Canadian Appalachians

Text of Bulletin ME 7

• Acknowledgments
• Introduction
• Proterozoic-Cambrian Structures
  • Middle Proterozoic Structures
  • Late Proterozoic-Cambrian Structures
  • Interpretation
• Paleozoic Structures: Appalachian Orogeny
  • Taconian Episode of Deformation: Early-Late Ordovician and Northwesterly Vergent in the Humber and Western Dunnage Zones (Notre Dame/Dashwood Subzones) 
  • Early Paleozoic Structures in the Dunnage (east of the axis of vergence reversal), Gander and Avalon Zones
  • Acadian and Alleghanian Episode of Deformation: Early Devonian-Mid Permian Affecting All Zones
• Mesozoic Structures
• References
• List of Figures
  • Figure 1. Maps of Appalachian Orogen showing reentrants, promontories and structural trends of various ages; with cross-sections showing the inferred 3-D geometry. Inset shows zonal subdivision of the northern Appalachians.
  • Figure 2. Map of middle Proterozoic structures (ca. 900 Ma) in and around the Appalachian Orogen, with a table listing the nature and constraints on the age of the tectonism.
  • Figure 3. Map of late Proterozoic-Cambrian structures with a table (in pocket) listing their nature and constraints on the age of the tectonism at localities marked on the map.
  • Figure 4. Correlation chart for structures in the Montreal/Quebec City to Lac Megantic transect, southwestern Quebec.
  • Figure 5. Correlation chart for structures in the Gaspé Quebec to Nova Scotia transect.
  • Figure 6. Correlation chart for structures in the Bay of Islands to Placentia Bay transect, in central/southern Newfoundland.
  • Figure 7. Correlation chart for structures in the White Bay - Notre Dame Bay - Bonavista in Bay transect, northern Newfoundland.
  • Figure 8. Correlation chart for structures in the Hare Bay transect, northernmost Newfoundland.
  • Figure 9. Map of Early-Late Ordovician structures in the Canadian Appalachians.
  • Figure 10. Map of Late Ordovician and Silurian structures in the Canadian Appalachians.
  • Figure 11. Map of Devonian to Permian structures in the Canadian Appalachians.
  • Figure 12. Map and section of the Hare Bay Allochthon and Grey Islands to show the main structural slices (after Williams, 1975 & Williams & Smyth, 1973; Kennedy et al., 1973). Also shown are the fabric elements in the White Hills peridotite (after Girardeau, 1982) and in the underlying metamorphic aureole at Starks Bight (after Craw, 1983), both parts of the highest St. Anthony slice.
  • Figure 13. Map and section of the Southern White Bay Allochthon and western Fleur de Lys Supergroup (after Smyth and Schillereff, 1982, Williams, 1977).
  • Figure 14. Map and section of the Humber Arm Old Man's Pond and Hughes Lake Allochthons to show the major structure (after Williams, 1975; Karson & Dewey, 1978; Casey & Kidd, 1981; Williams et al., 1982). Also shown are the fabric elements and dyke complex in the Bay of Islands ophiolite complex (after Girardeau and Niccolad, 1981; Mercier, 1976; Christensen and Salisbury, 1979; Rosencrantz, 1983).
  • Figure 15. Map and section of the structural elements of the Gaspé Peninsula (after St. Julien & Hubert, 1975). Also shown are the fabric elements (after Sikander & Fyson, 1969; Carrara & Fyson, 1973; De Romer, 1976; Beaudin, 1980).
  • Figure 16. Map and sections of the structural elements in southwestern Quebec (after St. Julien & Hubert, 1975, St. Julien et al., 1983; Ando et al., 1983; Laroche, 1983.
  • Figure 17. Time-Space diagram along the Humber-Notre Dame zones illustrating the synchronous start of subduction and the diachronous start of arc-continental rise collision and the end of convergence.
  • Figure 18. Time-Space diagram for accretionary deformation relative to zones in the Canadian Appalachians, accompanied by tectonic models to explain the accretionary events.