The Slanting Dykes were introduced by Lafrance et al. (2016) to group gabbroic dykes cutting the Nekuashu Suite (nApPnek).

Gabbro dykes are magnetic and fine grained. Chilled margins were observed on a few outcrops. Gabbro contains millimetric euhedral to subhedral plagioclase laths and 50-65% millimetric ferromagnesian mineral grains and clusters. Although the subophitic texture is very well preserved, there is locally initial recrystallization with the formation of subgrains at the edge of plagioclase crystals. These rocks have also undergone moderate alteration characterized by plagioclase saussuritization and clinopyroxene uralitization. Ferromagnesian minerals consist of a fine-grained mix of green hornblende and actinolite with clinopyroxene remains in the core of amphibole clusters. Opaque minerals, mainly magnetite, are present in large amounts (up to 5%) and epidote is consistently present. Small amounts of apatite, quartz, garnet and sphene were also observed in some thin sections.