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Preliminary Investigations of Early Proterozoic western River and Burnside River Formations : Evidence For Foredeep Origin of Kilohigok Basin, District of Mackenzie

Grotzinger, J. P. and Gall, Q. (1986) Preliminary Investigations of Early Proterozoic western River and Burnside River Formations : Evidence For Foredeep Origin of Kilohigok Basin, District of Mackenzie. Geological Survey of Canada, 86 (1A). pp. 95-106. ISSN 0068-7650. https://resolver.caltech.edu/CaltechAUTHORS:20141014-094646232

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Abstract

In the Kilohigok Basin, the Western River and Burnside River formations comprise three successively overlying tectono-stratigraphic sedimentary units of regional extent: a basal shallow water siliciclastic/carbonate platform, overlain by deepwater flysch, in turn overlain by shallow marine and fluvial molasse. This stratigraphy represents an initial stable shelf (passive margin?) whose outer, southerly edge rapidly subsided contemporaneous with arching and subaerial exposure of its interior. Shelf drowning represents the onset of foredeep subsidence subparallel to the trend of Thelon Tectonic Zone. Arching and subsidence were perpendicular to the tectonic transport direction of intrabasinal nappes. indicating that convergence and uplift a long Thelon Tectonic Zone were probably responsible for foredeep subsidence within Ki lohigok Basin. Following drowning, the platform was buried by deepwater deposits ( flysch); with progressive uplift and basin filling, the foredeep entered the molasse phase and fluvial sediments prograded towards the foreland. The foredeep model places constraints on the origin of Thelon Tectonic Zone and provides a more comprehensive understanding of the tectonic evolution of the Slave Province and its relation to the Wopmay Orogen.


Item Type:Article
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http://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=120355PublisherArticle
ORCID:
AuthorORCID
Grotzinger, J. P.0000-0001-9324-1257
Additional Information:© 1986 Geological Survey of Canada. Released 1986 01 01. Date Modified: 2013-09-19. We gratefully acknowledge the Geological Survey of Canada for logistical support and the opportunity to work in Kilohigok Basin. Barry Cadigan and Gary Luffman are thanked for field assistance. Martin Irving, based in Yellowknife, provided excellent expediting services. Echo Bay Mines, Ltd. is thanked for use of their helicopter . S.A. Bowring visited us and participated in valuable discussions, and sampling of siliciclastic sediments for detrital zircon provenance studies. Critical reviews by R. Tirrul and P.F. Hoffman substantially improved an earlier version of the manuscript.
Issue or Number:1A
Record Number:CaltechAUTHORS:20141014-094646232
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141014-094646232
Official Citation:Grotzinger, J P; Gall, Q Current Research Part A/Recherches En Cours Partie A; Geological Survey of Canada, Paper no. 86-1A, 1986; p. 95-106
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50372
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:14 Oct 2014 17:12
Last Modified:03 Oct 2019 07:23

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