P. I. Dorogokupets
Institute of the Earth’s Crust of SB RAS, Irkutsk, Russia
Russian Federation

Doctor of Geology and Mineralogy, Head of Laboratory of Petrology,
Geochemistry and Ore Genesis
Institute of the Earth’s Crust, Siberian Branch of RAS
128 Lermontov street, Irkutsk 664033, Russia

T. S. Sokolova
Institute of the Earth’s Crust of SB RAS, Irkutsk, Russia
Russian Federation

Candidate of Geology and Mineralogy, Junior Researcher
Institute of the Earth’s Crust, Siberian Branch of RAS
128 Lermontov street, Irkutsk 664033, Russia

K. D. Litasov
V.S. Sobolev Institute of Geology and Mineralogy of SB RAS, Novosibirsk, Russia Novosibirsk State University, Novosibirsk, Russia
Russian Federation

Doctor of Geology and Mineralogy, Chief Researcher
V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS
3 Koptyuga Ave., Novosibirsk 630090, Russia