New geological and geochemical data on the granitoids of the Uspensky massif in Southern Primorye

Research on the Uspensky granitoid massif in Southern Primorye reveals two distinct associations of granitoids, formed at 103.3 ± 2.4 Ma and 99 ± 2 Ma respectively, with unique geological and geochemical characteristics. The early association consists of garnet-bearing biotite and two-mica granite-leucogranites, while the late association includes biotite (±amphibole) granodiorites, melanogranites, and granites. These granitoids exhibit moderate potassic alkalinity and elevated alumina contents but differ in their proportions of alumina, calcium, and alkalis. The study also highlights distinct trace-element compositions, with garnet-bearing granite-leucogranites showing high Rb, Th, and U contents and low Sr, Ba, Hf, and Zr contents, while melanogranites display higher Sr and Ba contents. The research suggests that both associations correspond to S-type granitoids formed by partial melting of crustal protoliths, indicating the generation of S-granites at different stages in the formation of the Central Sikhote Alin plutonic belt within a transform continental margin setting.

Moskalenko, E. Yu., Kruk, N. N., & Valui, G. A. (2011). New geological and geochemical data on the granitoids of the Uspensky massif in Southern Primorye. Russian Journal of Pacific Geology, 5(5), 446–457. https://doi.org/10.1134/s181971401105006x