V. N. Zinchenko
Catoca Mining Society (Catoca)
Angola

Zinchenko Vladimir Nikolaevich – PhD (Geology and Mineralogy), Catoca

Talatona, Luanda

A. S. Ivanov
Empress Catherine II Saint Petersburg Mining University (SPMU)
Russian Federation

Ivanov Aleksandr Sergeevich – PhD (Geology and Mineralogy), Leading Researcher, SPMU

21 liniya, St. Petersburg, 199106

I. V. Ashchepkov
V. S. Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences (IGM SB RAS); Geological Institute of Siberian Branch of Russian Academy of Sciences (GIN SB RAS)
Russian Federation

Ashchepkov Igor Viktorovich – PhD (Geology and Mineralogy), Senior Researcher, IGM SB RAS, GIN SB RAS

Pr. Akademika Koptyuga, Novosibirsk, 630090

6a Ul. Sakhyanovoy, Ulan-Ude, 670047