Geochemical and Isotopic Geochemical Characteristics of PGE Mineralization in the Lukkulaisvaara Layered Massif, Karelia, Russia

• Published in: Geology of ore deposits Vol. 59; no. 8; pp. 687 - 706
• Main Authors: Semenov, V. S., Semenov, S. V., Savatenkov, V. M., Dech, V. N., Glebovitsky, V. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2017; Springer Nature B.V
• Subjects: Crystallization; Earth and Environmental Science; Earth Sciences; Geochemistry; Intrusion; Isotopes; Lava; Lead; Magma; Mineral assemblages; Mineral Resources; Mineralization; Olivine; gabbronorite; Karelia; PGE mineralization; Lukkulaisvaara massif; isotopic Rb–Sr; postmagmatic alteration; geochemical characterization; Sm–Nd data; Pb–Pb
• ISSN: 1075-7015; 1555-6476
• DOI: 10.1134/S1075701517080098

The study of the Lukkulaisvaara layered massif from the Olang group of intrusions in northern Karelia corroborates the important role of supplementary intrusive phases of PGE mineralization. Injection and crystallization of new magma portions result in (1) the formation of potholelike depressions within intrusion and (2) a return to high-temperature olivine-bearing mineral assemblages in the mafic part of section. PGM formation is accompanied by crystallization of secondary minerals in a wide range of temperatures and pressures. To provide insight into these problems, a geochemical study of Nadezhda area has been performed and new data obtained for the distribution of isotopes in the Rb–Sr, Pb–Pb, and Sm–Nd systems.