Location of work: Institute of Geology named after Academician N. P. Yushkin of the Komi Science Centre of the Ural Branch of the Russian Academy of Sciences (IG Komi SC UB RAS), Syktyvkar, Russia
E-mail: ikh_shumilov@mail.ru
Location of work: Institute of Geology named after Academician N. P. Yushkin of the Komi Science Centre of the Ural Branch of the Russian Academy of Sciences (IG Komi SC UB RAS), Syktyvkar, Russia
E-mail: ikh_shumilov@mail.ru
