Geochronology of detrital zircons from the Elzevir and Frontenac terranes, Central Metasedimentary Belt, Grenville Province, Ontario

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doi: 10.1139/e93-034
Authors:Sager-Kinsman, E. Anne; Parrish, R. R.
Author Affiliations:Primary:
Carleton University, Department of Earth Sciences, Ottawa, ON, Canada
Other:
Geological Survey of Canada, Canada
Volume Title:Canadian Journal of Earth Sciences Revue Canadienne des Sciences de la Terre
Source:Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre, 30(3), p.465-473. Publisher: National Research Council of Canada, Ottawa, ON, Canada. ISSN: 0008-4077
Publication Date:1993
Note:In English with French summary. Geol. Surv. Can., Contrib. No. 52991. 33 refs.; illus. incl. 1 table, geol. sketch maps
Summary:The provenance and the maximum age of clastic rocks in these two terrains of the CMB have been studied. The Flinton group, part of the Elzevir terrain, is a mainly clastic sequence that unconformably overlies igneous and metavolcanic rocks of the main part of that terrain. Zircon evidence suggests that the quartzite was deposited after approx 1150 m.y., indicating that the Flinton group is > 100 m.y. younger than the intrusion of the Elzevir batholith. It is possible that the zircons were derived from plutons in the Frontenac terrain, implying that the two terrains were contiguous during Flinton group deposition. Subsequent metamorphism of the Flinton group occurred at 1150-1080 m.y. The Frontenac terrain contains marble associated with pelitic gneiss and quartzite, as well as granitic intrusive rocks; it resembles a metamorphosed continental margin sedimentary sequence. U-Pb analyses of zircons from quartzites show stronger evidence for Grenvillian Pb loss than zircons from the Flinton group. 207Pb/206Pbevidence suggests that the quartzite could have been deposited over the same time interval as the 1200-1300 m.y. metasedimentary and metavolcanic rocks of the Elzevir terrain. Although the Frontenac terrain experienced metamorphism at approx 1100 m.y. with the Elzevir terrain, its main metamorphic peak occurred before 1170 m.y. [R.E.S.]
Subjects:Absolute age; Dates; Detritus; Flinton Group; High-grade metamorphism; Metamorphic rocks; Metamorphism; Metasedimentary rocks; Nesosilicates; Orthosilicates; Precambrian; Provenance; Quartzites; Sedimentation; Silicates; Terranes; U/Pb; Zircon; Zircon group; Canada; Canadian Shield; Central Metasedimentary Belt; Elzevir Terrane; Grenville Province; North America; Frontenac Terrane
Coordinates:N441500 N444000 W0755500 W0763000
Abstract Numbers:94M/2756
Record ID:1993034624
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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