Crustal paleo-hydrogeological mapping as a tool in exploration for mineral deposits

Extensive studies in the southern Canadian Cordillera have shown that using geological and geochemical techniques, it is possible to regionally map distinctive paleo-hydrogeological regimes. Since research programs in the Canadian Cordillera and elsewhere have shown that many types of mineralization are created by regional scale flow systems, It is possible to use the regional maps of paleo-hydrogeological regimes to define those areas likely to host particular styles of mineralization. An application of these concepts to exploration is documented using the example of mesothermal Au mineralization in the southern Canadian Cordillera. Approximately 75% of the 300,000 km(2) study area can be eliminated from consideration for exploration due to the absence of the appropriate geological and geochemical indications of paleo-hydrogeological regimes capable of forming mesothermal Au deposits. Consequently, exploration efforts can be focussed on a much smaller, but more prospective region.