TY JOUR TI KW structural indexes KW basin organization of territory KW Khovu-Aksy arsenide-cobalt deposit KW tailings dam KW groundwater KW hydrochemical composition JO MOSCOW ECONOMIC JOURNAL AU Kal'naya, O.I. AU Platonova, S.G. AU Ayunova, O.D. AU Skripko, V.V. AU Kopylova, Y.G. AU Hvaschevskaya, A.A. PY 2019 IS 4 PB Electronic science