Tectonic setting and mineralisation potential of the Cowley Ophiolite Complex, north Queensland

Northeast Queensland contains multiple slices of mafic–ultramafic units, strung out along regional faults that mark major tectonic boundaries. One such complex is the Cowley Ophiolite Complex, which situated Russell-Mulgrave Fault. The Complex a differentiated composed gabbro, chlorite schist, anthophyllite schist and serpentinite. We interpret alteration assemblages observed throughout reflect an amphibolite facies metasomatic overprint within supra-subduction zone setting. This interpretation consistent with geochemical discrimination chromite grains from schist. records higher metamorphic grade than surrounding Hodgkinson Formation, we this to allochthonous structural setting complex, positioned ancient subduction margin. margin represented today by Metasomatism emplacement probably pre-dated deposition Mossman Orogen’s active successions. Our formation Orogen, suggests Fault Paleozoic, continental suture zone. presents little indication economic mineralisation; however, much remains unexplored. KEY POINTSThe differentiated, formed setting.Emplacement Fault, Province.The represents margin, interpreted as