Abstract
The Port Coldwell Pb-Zn-Ag veins are hosted mainly in Archean rocks in a linear belt on the north shore of Lake Superior, between Schreiber and Marathon, Ontario (Fig. 1). Although ore tonnages are small and only very minor production has come from the deposits, ore grades are high. The deposits contain galena, sphalerite, pyrite, chalcopyrite, covellite, digenite, and freibergite, the silver carrier, in calcite and quartz gangue. Typical ore grades are: 52.94% Pb, 15.60% Zn, 60.49 oz. Ag/t (Deadhorse Creek South; Patterson et al. 1985) and 7.06% Pb, 25.85% Zn, 0.185% Cu, 41.57 oz. Ag/t and 0.01 oz. Au/t (Morley High Grade; Patterson et al. 1984).
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© 1995 Springer Science+Business Media Dordrecht
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McCuaig, T.C., Kissin, S.A. (1995). The Port Coldwell Veins, Northern Ontario: Pb-Zn-Ag Deposits in a Rift Setting. In: Ojakangas, R.W., Dickas, A.B., Green, J.C. (eds) Basement Tectonics 10. Proceedings of the International Conferences on Basement Tectonics, vol 4. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0831-9_4
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DOI: https://doi.org/10.1007/978-94-017-0831-9_4
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