Author(s)

Tamara Bayanova^1*, Viktor Subbotin¹, Svetlana Drogobuzhskaya², Anatoliy Nikolaev², Ekaterina Steshenko¹

¹Geological Institute, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia.
²Tananaev Institute of Chemistry, Kola Science Centre, Russian Academy of Sciences, Apatity, Russia.

Baddeleyite is an important mineral geochronometer. It is valued in the U-Pb (ID-TIMS) geochronology more than zircon because of its magmatic origin, while zircon can be metamorphic, hydrothermal or occur as xenocrysts. Detailed mineralogical (BSE, KL, etc.) research of baddeleyite started in the Fennoscandian Shield in the 1990s. The mineral was first extracted from the Paleozoic Kovdor deposit, the second-biggest baddeleyite deposit in the world after Phalaborwa (2.1 Ga), South Africa. The mineral was successfully introduced into the U-Pb systematics. This study provides new U-Pb and LA-ICP-MS data on Archean Ti-Mgt and BIF deposits, Paleoproterozoic layered PGE intrusions with Pt-Pd and Cu-Ni reefs and Paleozoic complex deposits (baddeleyite, apatite, foscorite ores, etc.) in the NE Fennoscandian Shield. Data on concentrations of REE in baddeleyite and temperature of the U-Pb systematics closure are also provided. It is shown that baddeleyite plays an important role in the geological history of the Earth, in particular, in the break-up of supercontinents.

Baddeleyite, PGE, U-Pb Isotope Data, Geochronology, Paleoproterozoic PGE Layered Intrusion, Complex Deposits, Paleozoic, Fennoscandian Shield

Bayanova, T. , Subbotin, V. , Drogobuzhskaya, S. , Nikolaev, A. and Steshenko, E. (2019) Baddeleyite from Large Complex Deposits: Significance for Archean-Paleozoic Plume Processes in the Arctic Region (NE Fennoscandian Shield) Based on U-Pb (ID-TIMS) and LA-ICP-MS Data. Open Journal of Geology, 9, 474-496. doi: 10.4236/ojg.2019.98031.