DISCLAIMER: This English version is translated from the original French. In case of any discrepancy, the French version shall prevail.
Parent et al. (2000, 2001) described three small leucotonalite intrusions in the Duvert Lake area (sheet 34H09) and assigned them to the Morrice Suite (Agdm2). Considering that the latter consits exclusively of granite, Simard et al. (2008) grouped these three tonalitic intrusions into a new unit, the Rivière Qijuttuuq Suite. It is located exclusively in the Qijuttuuq River area of which it is named.
The Rivière Qijuttuuq Suite includes three small biotite-hornblende (<10%) leucotonalite intrusions. The rock is homogeneous, massive to foliated, and generally poorly deformed (Simard et al., 2008; Simard, 2008; MNRF, 2010). Two uranium mineralized zones were observed in a tonalite intrusion and in host rocks (paragneiss and andesite) of the Duvert Complex. In tonalite, mineralization occurs primarily as centimetric halos rich in uranophane and biotite (Champigny et al., 2009).
Thickness and distribution
The Rivière Qijuttuuq Suite consists of three small ovoid intrusions located in the Qijuttuuq River area (sheets 34H09 and 34H16). Their width varies from 2 to 4 km over a length of ~4.5 to 6 km.
Rivière Qijuttuuq Suite intrusions are considered late due to their pporly deformed appearance and crosscutting relationships observed in the field (Simard et al., 2008; Simard, 2008). The majority of Minto Subprovince large tonalitic suites were emplaced before 2740 Ma (Simard, 2008). However, some late tonalitic intrusions yielded ages around 2690 Ma (Simard et al., 2008). Small intrusions of the Rivière Qijuttuuq Suite likely intruded during this last period (Simard, 2008).
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Publications Available Through SIGÉOM Examine
CHAMPIGNY, N., RICHER, C. 2009. REPORT ON 2008 GEOLOGICAL ASSESSMENT WORK ON THE URANIUM NORTH PROPERTY. MINES VIRGINIA INC, MATAMEC EXPLORATION INC. Assessment report submitted to the Government of Québec, GM 64275, 45 pages.
MRNF. 2010. CARTE(S) GÉOLOGIQUE(S) DU SIGÉOM – feuillet 34H. CG SIGEOM34H, 1 plan.
PARENT, M., LECLAIR, A., DAVID, J., SHARMA, K N M. 2000. GÉOLOGIE DE LA RÉGION DU LAC NEDLOUC (SNRC 34H ET 24E). MRN. RG 99-13, 46 pages and 2 plans.
PARENT, M., LECLAIR, A., DAVID, J., SHARMA, K N M. 2001. GEOLOGY OF THE LAC NEDLOUC AREA (NTS 34H AND 24E). MRN. RG 2000-09, 41 pages and 2 plans.
SIMARD, M. 2008. LEXIQUE STRATIGRAPHIQUE DES UNITÉS ARCHÉENNES DU NORD-EST DE LA PROVINCE DU SUPÉRIEUR. MRNF. DV 2008-03, 107 pages.
SIMARD, M., LABBE, J Y., MAURICE, C., LACOSTE, P., LECLAIR, A., BOILY, M. 2008. SYNTHÈSE DU NORD-EST DE LA PROVINCE DU SUPÉRIEUR. MRNF. MM 2008-02, 198 pages and 8 plans.
Ministère de l’Énergie et des Ressources naturelles (MERN). Rivière Qijuttuuq Suite. Quebec Stratigraphic Lexicon. https://gq.mines.gouv.qc.ca/lexique-stratigraphique/province-du-superieur/suite-de-la-riviere-qijuttuuq_en [accessed on Day Month Year].
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