Т. Tran Van
Sergo Ordzhonikidze Russian State University for Geological Prospecting; General Administration of Geology and Mineral Resources of Vietnam
Russian Federation

Tien Tran Van  — postgraduate student of the Department of Geology of Mineral Deposits

23, Miklukho-Maklay str., Moscow 117997;

6, Pham Ngu Lao str., Ha Noi 100000

tel.: +7(926) 671-72-31 

Р. А. Ignatov
Sergo Ordzhonikidze Russian State University for Geological Prospecting
Russian Federation

Petr A. Ignatov — Dr. of Sci. (Geol.-Min.), Professor of the Department of Geology of Mineral Deposits 

23, Miklukho-Maklay str., Moscow 117997

tеl.: +7 (495) 461-37-77

Т. Mai Тrong
General Administration of Geology and Mineral Resources of Vietnam
Viet Nam

Tu Mai Trong — Dr. of Sci. (Geol.-Min.), Deputy General Director of the Department of Geology

6, Pham Ngu Lao str., Ha Noi 100000

tel.: +84 93 510 03 59

Н. Nguyen Duy
Sergo Ordzhonikidze Russian State University for Geological Prospecting
Russian Federation

Hung Nguyen Duy  — postgraduate student of the Department of Geology of Mineral Deposits 

23, Miklukho-Maklay str., Moscow 117997

tel.: +7(977)957 29 68