Exploring mineral chemistry variations in tourmaline and chlorite at the Triangle orogenic gold deposit (Val-d'Or, Quebec): Implications for mineralisation vectors

Recent efforts in the research of ore deposits focus on the chemical characterisation of key minerals in mineralised systems to define vectors and indicator minerals constituting new and powerful exploration tools. The present study reports systematic tourmaline and chlorite chemical variability from the Triangle orogenic gold deposit (Val-d'Or, Quebec). A detailed study of the paragenetic sequence allows defining at least three main mineralisation events. This study focuses on the characterisation of tourmaline and chlorite chemistries contained in the Au-bearing quartz-tourmaline-ankerite-chlorite veins of the second and main mineralising event, in the two main shear zones of the deposit, named C2 and C4. Chemical variability of chlorite and tourm have been explored using Principal Component Anal Abs which relate allows to find some elemental ratios that strong! with the elevation and Au grade of the samples g both shears. Further investigation on the physicochemical factors, including the effect of host rocks, controlling tourmaline and chlorite chemistries is in progress to define potential tracers that will allow vectorisation towards the high-grade ore shoots in the Triangle deposit and other shear-hosted orogenic gold deposits.