Number Element Content Number Element Content 1 Ca 45.322% 7 Sr 0.111% 2 Al 5.413% 8 Mn 0.156% 3 Si 19.588% 9 Fe 13.769% 4 P 0.300% 10 Ti 1.485% 5 S 2.671% 11 Br 0.191% 6 K 9.491% 12 Mg 1.503%

Table 2: Element make-up of a mineral part of fuel shale in Leningrad field (excluding the organic part).