Affiliation: | (1) St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia;(2) Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia;(3) Karpinskii All-Russia Research Institute of Geology, Srednii pr. 74, St. Petersburg, 199106, Russia;(4) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia |