The Crony Suite was introduced by Vanier and Lafrance (2020) in the Sirmiq Lake area to group migmatized paragneiss and diatexite units derived from melting of these paragneisses of the Kovik Lithotectonic Domain. It includes subunits ApPkvk3a and ApPkvk3b formerly assigned to the Kovik Complex by Charette and Beaudette (2018) in the Cape Wolstenholme area.

The Crony Suite consists of two units: 1) migmatized paragneiss and stromatic metatexite; and 2) schlieren diatexite.

In thin section, the rock has an heterogranular interlobed to partially granoblastic texture. Coarse clusters of amoeboid quartz are also observed, generally elongated and forming discontinuous bands in foliation. Plagioclase is sericitized in places and myrmekites are visible. If present, microcline tends to concentrate in the leucosome. Paragneiss and metatexite commonly contain red biotite, garnet, sillimanite, muscovite and graphite. Garnet is locally rimmed by plagioclase. Accessory minerals are, in order of importance, epidote, muscovite (in flakes associated with plagioclase sericitization), chlorite (retrograde on biotite and garnet), apatite, graphite, allanite, hornblende and zircon (as inclusions in biotite).

In the east-central part of sheet 35K01, an E-W strip a few kilometres wide assigned to unit ApPcry1 differs from the rest of the unit by the presence of small crystals of clinopyroxene (<5%) or hornblende (<3%).

Crony Suite 2 (ApPcry2): Schlieren Diatexite

Schlieren diatexite resulting from partial melting of unit ApPcry1 paragneiss is heterogeneous and contains decimetric to metric layers and rafts of lightly migmatized paragneiss and metatexite. This rock is whitish and heteroganular. Heterogeneity is produced by the distribution of ferromagnesian minerals in numerous schlierens and millimetric clusters, as well as by the presence of bands, zones or injections of white leucocratic material resembling anatectic granite. The latter locally makes up to 25% of outcrops.

Diatexite is in places affected by folding or crenulation. Garnet forms porphyroblasts 0.5 cm to 2 cm in diameter. Sillimanite can account for up to 25% of the mineral phases and is concentrated in flexuous lenticular nodules stretched in foliation. In thin sections, quartz and feldspar form even-grained and interlobed grain clusters. Garnet contains some biotite and quartz inclusions, while sillimanite is fibrous and prismatic. Opaque minerals are sparse.

Thickness and Distribution

The Crony Suite forms klippes a few hundred metres to 3 km wide and 1 km to 20 km long within the Kovik Lithotectonic Domain. Unit ApPcry1 covers the largest area, while unit ApPcry2 represents only sparse klippes.

Dating

None.