![]() Eight distinct sedimentary facies, grouped in four stratigraphic units, have been thus identified in a set of up to 4.3 m long gravity cores totalling more than 60 m. Here we present the first multiproxy physicochemical characterization of the submarine tailings in Portmán Bay, mostly by using non-destructive techniques, also including pre-dumping and post-dumping sediments. In Portmán Bay, SE of Spain, large amounts of tailings from open pit sulphide mining were discharged directly into the coastal sea over 33 years, thus forming a massive deposit that completely infilled the bay and expanded seawards over the inner continental shelf. For a long time, seafloor disposal has been viewed as a cheap option with barely visible impacts. ![]() Mining activities are essential to our society, but ore extraction and treatment produce waste that must be stored in safe places without harm to the environment. ![]()
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March 2023
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