D. M. Bachmanov
Geological Institute of RAS
Russian Federation

Bachmanov, Dmitry M., Candidate of Geology and Mineralogy, Senior Researcher 

7 Pyzhevsky lane, Moscow 119017, Russia

A. I. Kozhurin
Geological Institute of RAS; Institute of Volcanology and Seismology, Far East Branch of RAS
Russian Federation

Kozhurin, Andrei I., Doctor of Geology and Mineralogy, Head of Laboratory 

7 Pyzhevsky lane, Moscow 119017; 9 Piip Boulevard, Petropavlovsk-Kamchatsky 683006, Russia

V. G. Trifonov
Geological Institute of RAS
Russian Federation

Trifonov, Vladimir G., Doctor of Geology and Mineralogy, Senior Researcher 

7 Pyzhevsky lane, Moscow 119017, Russia