Geophysical transect of the Eagle Plains foldbelt and Richardson Mountains anticlinorium, northwestern Canada

Abstract

Research Article| March 01, 1998 Geophysical transect of the Eagle Plains foldbelt and Richardson Mountains anticlinorium, northwestern Canada K. W. Hall; K. W. Hall 1Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, Canada Search for other works by this author on: GSW Google Scholar Frederick A. Cook Frederick A. Cook 1Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information K. W. Hall 1Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, Canada Frederick A. Cook 1Department of Geology and Geophysics, University of Calgary, Calgary, Alberta T2N 1N4, Canada Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1998) 110 (3): 311–325. https://doi.org/10.1130/0016-7606(1998)110<0311:GTOTEP>2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation K. W. Hall, Frederick A. Cook; Geophysical transect of the Eagle Plains foldbelt and Richardson Mountains anticlinorium, northwestern Canada. GSA Bulletin 1998;; 110 (3): 311–325. doi: https://doi.org/10.1130/0016-7606(1998)110<0311:GTOTEP>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract A 250-km-long east-west geological and geophysical transect has been constructed at about lat 66°40′N, from near the Yukon-Alaska border, across the Eagle Plains foldbelt and Richardson Mountains anticlinorium, to the Interior platform in northwestern Canada. It includes reprocessed industry seismic reflection profiles, regional gravity data, and drill hole information. The north-trending Richardson Mountains anticlinorium is interpreted to be a contractional (pop-up) structure, having a core of Proterozoic and lower Paleozoic rocks; the structure is bounded on the east and west by post-Early Mississippian, pre- or syn-Cretaceous thrust faults. Contractional deformation in the Eagle Plains foldbelt is probably the same age. The location of the pop-up may have been controlled by a preexisting west-facing crustal scale ramp at the top of the crystalline basement. A horizontal displacement of about 33 km is required to accommodate the pop-up; the displacement probably occurs above regional detachment(s) that project westward beneath the Eagle Plains. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.