Proposed Title 1: - Queen's University

which was interpreted as being associated with the U mineralization. The age of 1820 Ma is
interpreted from U-Pb geochronology of paragenetically constrained U 1 . (See text for details).
Disseminated Cpy 1 chalcopyrite and Py 1 pyrite are present in the most altered
samples. Mzn 1 monazite associated with Ttn 1 titanite occurs as disseminated aggregates of
grains (Fig. 4.5B) and Ap 1 apatite occurs as elongated euhedral and transparent tabular
crystals (Fig. 4.5C). Early Qtz 2 quartz veins crosscut the quartz-feldspar porphyry (Fig.
4.5D) and occur locally as stockworks. Chl 1 chlorite is present as replacement of Src 1
sericite in the matrix (Fig. 4.5E) or frequently as coarse, felty-textured, radiating aggregates
coating Qtz 2 veins (Fig. 4.5D) where it forms thin needles crosscutting Qtz 2 veins (Fig.
4.5D). Hem 1 hematite forms primary inclusions in Qtz 2 veins where it replaces Chl 1
chlorite needles (Fig. 4.5D) and Src 1 sericite (Fig. 4.5E) in the matrix. Cal 1 calcite also
replaces Src 1 sericite and Chl 1 chlorite in the matrix (Fig. 4.5F).
The granophyre rock displays a similar pre-ore alteration pattern. Src 1
sericite
replaces Kfs 0 alkali feldspar in quartz-alkali feldspar intergrowths. Src 1 sericite is later
replaced by Cal 1 calcite. Bt 0 biotite and Ms 0 muscovite laths are typically pseudomorphous
after Chl 1 Chlorite. Ap 1 apatite, Hem 1 hematite and Ttn 1 titanite are part of the pre-ore
assemblage.
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