IOCG Exploration along the Cobequid-Chedabucto Fault Zone, Nova Scotia

Mining Rocks! CIM Toronto 2005
Michael Downes,
The Cobequid-Chedabucto Fault Zone (CCFZ) in northern Nova Scotia is a 300 km long series of en echelon faults; it represents the boundary between the Avalon Terrane to the north and the sedimentary Meguma Terrane to the south. The Avalon Terrane contains Devonian, rapakivi-textured A-type granites and co-magmatic mafic intrusions, and their extrusive equivalents, high-Zr rhyolite (ignimbrite) and basalt. The geology of the Avalon Terrane is at least superficially similar to that of the Proterozoic Gawler Craton, host to the giant Olympic Dam IOCG deposit in South Australia.

In the mid-1990’s, Nova Scotia government geologists drew attention to the many mineral occurrences (Fe, Cu, Co, Ba, Au) along the CCFZ that occur as veins and breccias, typically with significant iron carbonate and lesser iron oxide. Barite is common, and fluorite is locally present. Stream sediment data show elevated Co, Cu and Fe along the CCFZ. These factors precipitated Monster Copper’s original interest in the region; no previous exploration for IOCG deposits along the CCFZ had been documented.

Monster Copper, as operator of a joint venture with Wallbridge Mining, has been exploring in Nova Scotia since 2002. Prospecting, soil and water geochemistry, airborne magnetics and ground magnetics and IP/Resistivity surveying are used to develop drill targets. Present properties contain three small past-producing Cu deposits and several past-producing iron deposits. Au is known to occur on the properties. Monster Copper’s Nova Scotia project is presented as a case study in the generation and implementation of an IOCG exploration program.
Keywords: IOCG, Copper, Nova Scotia, Monster Copper Corporation
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