Proposed Title 1: - Queen's University

Ms 1 muscovite, Src 1 sericite, and dynamically recrystallized Qtz 1 quartz (Fig. 2.4F). The
quartzo-feldspathic mylonite exhibits recrystallized Qtz 1
quartz and Kfs 1 feldspars
porphyroclasts (Fig. 2.4H). Shear sense indicators such as δ and σ-type winged Kfs 1
feldspars porphyroclasts (Figs. 2.4G and 2.5A) and deflection foliation (Fig. 2.5B)
consistently display a dextral lateral sense of displacement.
The mylonitic foliation and lineation in the hornblende-feldspar gneiss contains the
higher metamorphic assemblage Kfs 1 +Pl 1 +Hbl 1 (Fig. 2.4D), compatible with amphibolite
facies metamorphism. Retrogression is indicated by partial replacement of Hbl 1 hornblende
by Bt 1 biotite along shear surfaces (Fig. 2.5C) and by replacement of Kfs 1 feldspars by Src 1
sericite (Fig. 2.5C). Bt 1 biotite is locally retrogressed into Chl 1 chlorite (Fig. 2.5D)
resulting in the mineral assemblage Bt 1 +Chl 1 + Src 1 +Qtz 1 typical of the greenschist
metamorphic facies. In places, Kfs 1 feldspars are completely sericitized and Chl 1 chlorite
completely replaced Bt 1
biotite, defining a lower greenschist metamorphic facies
(Qtz 1 +Src 1 +Hem 1 + Chl 1 ) (Fig. 2.5E). Late Chl 2 chlorite, Qtz 2 quartz, Ab 1 albite, Cal 1
calcite, and Ep 1 epidote veinlets cut the foliation. The mylonite is overprinted by a network
of ductile-brittle and brittle features.
Cataclasites occur in the hanging wall and in association with mylonites in the
footwall and are sub-parallel to the mylonitic fabric (Fig. 2.3). The cataclasite contains
variable-sized (0.2 to 0.5 mm) clasts of broken Qtz 1 quartz, Kfs 1 feldspars, and mylonite
fragments. The matrix is weakly foliated and contains recrystallized and milled Qtz 1
quartz, Cal 2 calcite, Chl 3 chlorite, Hem 3 hematite and Src 2 sericite (Fig. 2.5F). Sub-vertical
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