A note on the geochemistry of some shales from the Bathurst- Newcastle mining camp, northern New Brunswick

Abstract

Ordovician volcanic and sedimentary rocks of the Tetagouche Group are host to numerous stratiform sulphide deposits that appear restricted to certain stratigraphic horizons. As a mapping aid in these complexly deformed rocks, shales from some of the recently established formational divisions within the Tetagouche Group were analyzed to determine if they possess specific geochemical signatures that could be used for correlative purposes. Variation in geochemistry reflects a change in depositional conditions from anoxic to oxic between the early and mid-Ordovician and accounts for the abundance of preserved sulphide deposits in the lower part of the Tetagouche Group. -from Author