Scientific publications

The results of the detailed study of three horizons of the Ludicovian Ternavolok differentiated sill are reported. The chemical and mineral compositions of rocks in each horizon are described. The author has concluded that the lower horizon that corresponds in composition to augite-labrador basalt with transitional structures between microdolerite and basalteffusive facies should be understood as a separate unit. The average weighted composition of the middle and upper horizons, 46.66% SiO2, 13.61% MgO and 3.6% Na2O+K2O, corresponds to that of basalts according to the TAS classification. The middle horizon consists of websterites and the upper one is made up of augitic dolerites. The authors assumes that melt sulphurization and separation of sulphide liquate took place before the liquate was supplied to the subvolcanic chamber. Ternavolok sill rocks carry percentages of Ni, Cr and V that are high for basalts .