Geologic Setting of the Devonian-Mississippian, Rea and Samatosum VMS Deposits of the Eagle Bay Assemblage, Adams Lake Area, South Central British Columbia

Highly deformed, low-grade metasedimentary and metavolcanic rocks of the Eagle Bay Assemblage host the volcanogenic (?) massive sulphide Twin Mountain and Rea deposits, and the Samatosum vein deposit. The Twin Mountain d eposit c onsists o f s ulphide-bearing quartz-carbonate-barite lenses hosted by sericitized and silicified schists of volcanic origin. The Rea deposit consists of at least two massive sulphide lenses. The Samatosum deposit is a stratabound sulphide-rich quartz vein system that could be interpreted as a stockwork zone. The Rea and Samatosum deposits occur within an overturned metasedimentary sequence of sericitized and silicified argillites structurally overlain by mafic volcaniclastic rocks and flows. The stratigraphic sequences at Rea and Samatosum are very similar and we suggest that structural repetition by faulting occurred, and that the sedimentary and volcanic succession is of Devonian-Mississippian age.