Dr. Leonid Shumlyanskyy
Senior Research Fellow,
M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation,
National Academy of Sciences of Ukraine

Abstract

In his talk, Leonid Shumlyanskyy will present recently obtained data regarding the c. 1800-1750 Ma AMCG complexes of the Ukrainian shield, and coeval and spatially related mantle-derived rocks that are attributed to the Prutivka-Novogol large igneous province. A wide range of the questions related to the origin of AMCG complexes will be briefly discussed. These include: (1) the typically long duration of the AMCG magmatism and reasons for that long duration; (2) the composition of the initial melts of AMCG complexes; (3) the origin of jotunitic melts; (4) the relationships between lower-crustal (?) jotunitic and mantle-derived tholeiitic melts. Information on mineral deposits related to the c. 1800-1750 Ma magmatic rocks of the Ukrainian shield will be also reported.