Then unnamed (lithological unit I1B) in the Ministère’s recent compilations (MNRF, 2010), Guemache (2020) gave it the formal name of Wedding Pluton, referring to the Wedding River which flows westward in the northern part of the pluton, to join the Bell River. Auger and Longley (1939) were the first to describe his lithologies, particularly in its western part, on the Bell River shores, but also in its the central part. In 1978, Sullivan and his team also described some outcrops along the Bell River. In 2005, an outcrop was revisited in the central part of the pluton as part of the Ministère‘s mapping work.

The dominant lithology is biotite granite, massive, grey, rarely reddish pink, medium to coarse-grained, locally porphyraceous in the presence of large feldspar crystals (Auger and Longley, 1939). The mineralogical assemblage includes quartz, zoned and sericitized plagioclase, orthose, microcline and biotite (3-5%). Accessory minerals include titanite, locally as coarse grains, apatite, zircon and magnetite. A relatively recent description of a large outcrop in the centre of the Wedding Pluton (2005-JY-1007) confirms the felsic character of the rock (granite). The latter is coarse grained, massive, K-feldspar porphyraceous (centimetric phenocrystals) and affected by a well-developed magmatic foliation oriented 071/76. The mineralogical composition includes quartz, biotite, chlorite, epidote and, in significant amounts, hematite. Along the pluton, the rock appears to evolve towards a quartz monzonite (Auger and Longley, 1939).

The Wedding Pluton has an almost circular geometry (10 km x 12 km) easily recognizable on the map of the vertical gradient of the residual total magnetic field (Keating et al., 2010; Keating and d’Amours, 2010).

Dating

None.