Tasialuk Suite
Stratigraphic label: [ppro]tak
Map symbol: pPtak

First published: 5 December 2017
Last modified: 6 August 2019




  DISCLAIMER: This English version is translated from the original French. In case of any discrepancy, the French version shall prevail. 

Informal subdivision(s)
Numbering does not necessarily reflect the stratigraphic position.
Author:Simard et al., 2013
Type area:Kuujjuaq area (NTS sheet 24J)
Geological province:Churchill Province
Geological subdivision:Baleine Lithotectonic Domain
Lithology:Felsic intrusive rocks


The Tasialuk Suite was introduced by Simard et al. (2013) in the Kuujjuaq area (sheet 24J) to describe porphyraceous felsic intrusions located along the Gabriel Fault.



The composition of Tasialuk Suite rocks varies from tonalitic to granodioritic depending on the amount of centimetric K-feldspar phenocrystals (5-25%) that define the porphyraceous texture. The rock is generally homogeneous, medium grained and grey to pinkish grey. It contains 10-25% ferromagnesian minerals (biotite and, in lesser amount, hornblende) that form clusters with epidote, sphene and magnetite. Rocks are affected by strong to mylonitic foliation probably associated with deformation of the Gabriel Fault.


Thickness and distribution

The Tasialuk Suite consists of three intrusions located in the NW portion of the Baleine Lithotectonic Domain (Lafrance et al., in preparation). These intrusions, which cover a total area of ~38 km2, are 5-20 km long by 0.5-2.5 km wide.



No dating exists, but crosscutting relationships indicate an age younger than 1835 Ma (Kaslac Complex).

Stratigraphic Relationship(s)

Intrusions of the Tasialuk Suite cut Kaslac Complex units and contain enclaves of its various lithologies, as well as paragneiss of the False Suite.


Does not apply.


Author(s)TitleYear of PublicationHyperlink (EXAMINE or Other)
LAFRANCE, I. – VANIER, M.-A. – CHARETTE, B. Domaine lithotectonique de Baleine, sud-est de la Province de Churchill, Nunavik, Québec, Canada : synthèse de la géologie. Ministère de l’Énergie et des Ressources naturelles, Québec.In preparationBulletin géologiQUE
SIMARD, M. – LAFRANCE, I. – HAMMOUCHE, H. – LEGOUIX, C.Géologie de la région de Kuujjuaq et de la Baie d’Ungava (SNRC 24J et 24K). Ministère des Ressources naturelles, Québec; RG 2013-04, 60 pages.2013RG 2013-04





10 février 2020