U-Pb age constraints on the timing of deposition of the Waugh Lake and Burntwood (Athabasca) groups, southern Taltson magmatic zone, northeastern Alberta

Citations Over Time

Abstract

The Waugh Lake and Burntwood groups are dominantly metasedimentary sequences that outcrop in the southern Taltson magmatic zone in northeastern Alberta. The Waugh Lake Group, which forms a small outlier of lower greenschist grade sandstones, pelites, and volcanics exposed in the footwall of the Andrew Lake shear zone, was intruded by 1.97-1.96 Ga plutonic rocks of the Colin Lake and Andrew Lake suites. Detrital zircon ages from a sample of Waugh Lake Group conglomerate and the ages of intrusions constrain the timing of deposition of the lower part of the Waugh Lake Group to be between 2.02 and 1.97 Ga, which is older than previously inferred. Based on isotopic, geochemical, and stratigraphic considerations, the Waugh Lake basin is interpreted as a small intra-arc basin related to the Taltson arc. The Burntwood group is a section of lower greenschist grade sandstones and pelites exposed in a small outlier on the northwest shore of Lake Athabasca. Detrital zircons from a sample of arkosic hematitic pebbly sandstone indicate that the Burntwood group is younger than ca. 1.92 Ga and therefore not correlative with the Waugh Lake Group. On the basis of U-Pb data, locality, and lithological similarities, we propose reassignment of the Burntwood group to the Athabasca Group.

Related Papers

• → Extensional tectonics, basement uplift and Stephano-Permian collapse basin in a late Variscan metamorphic core complex (Montagne Noire, Southern Massif Central)(1990)180 cited
• → Accretion, mass wasting, and partitioned strain over the 26 Dec 2004 Mw9.2 rupture offshore Aceh, northern Sumatra(2007)37 cited
• Pennsylvanian foreland deformation of Wichita uplift, southwest Oklahoma(1986)
• → Fluvial Sheet Sandstone Development Above a Tectonically-Controlled Sequence Boundary: Canyon Creek Member, Erickson Sandstone (Campanian), Rock Springs Uplift, Wyoming: ABSTRACT(1994)
• Susquehanna Chorale Spring Concert "Roots and Wings"(2017)