Vulcan structure

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The Vulcan structure is a 350-kilometre (220 mi) long major convergent boundary between the and the , Archean basement rock structures which lie between the Wyoming craton and Hearne craton on the western edge of the North American craton.[1][2] It lies under the Western Canadian Sedimentary Basin.[1][3]

The Vulcan structure has intrigued geologists because it is a region of low gravity and contains an east-trending magnetic anomaly which cuts across the magnetic field of southern Alberta at a high angle.[1][2][3] The Vulcan structure was the target of one of the first deep-crustal seismic profiles in the late 1960s.[1][3][4] Geologists have offered several explanations for what the structure is: failed Proterozoic rift, intraplate collision zone, Proterozoic suture, or continental collision zone.[1]

References[]

  1. ^ a b c d e Eaton, David W.; Ross, Gerald M.; and Clowes, Ronald M. "Seismic-Reflection and Potential-Field Studies of the Vulcan Structure, Western Canada: A Paleoproterozoic Pyrenees?" Journal of Geophysical Research. 104:B10 (1999).
  2. ^ a b Hope, Jacqueline and Eaton, David. "Crustal Structure Beneath the Western Canada Sedimentary Basin: Constraints From Gravity and Magnetic Modelling." Canadian Journal of Earth Sciences. 39:3 (2002).
  3. ^ a b c Eaton, David; Ross, Gerald; Clowes, Ronald M.; and Cook, F.A. "Lithospheric Structure of the Southern Hearne Province, Canadian Shield: A Palaeoproterozoic Pyrenees?" LSPF Newsletter. 11:1 (December 1998).
  4. ^ For information generally on Deep Probe, see: Gorman, Andrew R.; Clowes, Ron M.; Ellis, Robert M.; Henstock, Timothy J.; Spence, George D.; Keller, G. Randy; Levander, Alan; Snelson, Catherine M.; Burianyk, Michael J.A.; Kansewich, Ernest R.; Asudeh, Isa; Hajnal, Zoltan; and Miller, Kate C. "Deep Probe: Imaging the Roots of Western North America." Canadian Journal of Earth Sciences. 39:3 (2002).
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