ERSHOVA, Victoria, Geological Department, Saint Petersburg State University, University Embankment 7/9, St. Petrsburg, 199034, Russia, ershovavictoria@gmail.com, HOLBROOK, John, School of Geology, Energy and The Environment, Texas Christian University, Fort Worth, TX 76129, KHUDOLEY, Andrei, Geology, St Petersburg State University, University nab. 7/9, St. Petersburg, 199034, Russia, and PROKOPIEV, Andrei, Tectonics, Diamond and Precious Metal Geology Institute, 39, Lenin Avenue, Yakutsk, 677980, Russia