Establishing types of mineral deposits and building genetic models for the formation of Sn-W mineral deposits in northern Vietnam.

Biotite Ar-Ar age is 85.5 ± 0.7 Ma for sulfide ore, which is consistent with the biotite Ar-Ar age of 84.1 ± 0.7 Ma and U-Pb zircon of 87 Ma for Cretaceous granite, indicating that the Nui Phao deposit is genetically related to the Cretaceous two-mica granite
The initial ore-forming fluid at the Nui Phao and Thien Ke deposits is represented by the reduced (CO2-CH4)–H2O–NaCl(CaCl2) system characterized by high temperatures and moderate salinities, which are analogous to a reduced intrusion-related ore-forming fluids.
The oxygen and sulfur isotope systematics suggest that the ore-forming fluid was generated from granite pluton.
Scheelite geochemistry indicates an increasing trend of fO2 from the early dark scheelite to the late light scheelite.
Education and tranining:
The project helped 01 Ph.D. student who is a member of the project studying in Russia to collect samples in Vietnam for the student's thesis.
Implementing these projects will help improve the scientific cooperation relationship between the parties.

Systematic studies on magmatic rocks and ores suggest their origin, as well as the relationship between them, specifically, mineralization in the Nui Phao mine, which was formed in the period of 85 Ma related its formation with Da Lien granites

- Publications:
The Hau Nguyen, P.A. Nevolko, Thi Dung Pham, T.V. Svetlitskaya, Trong Hoa Tran, R.A. Shelepaev, P.A. Fominykh, Ngoc Can Pham, 2020. Age and genesis of the W-Bi-Cu-F (Au) Nui Phao deposit, Northeast Vietnam: Constrains from U-Pb and Ar-Ar geochronology, fluid inclusions study, S-O isotope systematic and scheelite geochemistry. Ore Geology Reviews 123 (2020) 103578.
P.A. Nevolko, T.V. Svetlitskaya, The Hau Nguyen, Thi Dung Pham, P.A. Fominykh, Trong Hoa Tran, Tuan Anh Tran, R.A. Shelepaev, 2022. Genesis of the Thien Ke tungsten deposit, Northeast Vietnam: Evidence from mineral composition, fluid inclusions, S-O isotope systematics and U-Pb zircon ages. Ore Geology Reviews 143 (2022) 104791.