Evolution of prehnite-albite-calcite veins in metamorphic rocks from the Lapland Granulite Belt (Kandalaksha region of Kola Peninsula)

• Main Authors: Huber, Miłosz, Halas, Stanisław
• Format: Article in Journal/Newspaper
• Language: Lithuanian; English
• Published: 2007
• Subjects: Lapland granulite belt; Kandalaksha; Prehnite veins; Albite veins; Calcite veins; Stable isotopes; Kola Peninsula; kola peninsula; Lapland
• Online Access: http://lsmu.lvb.lt/LSMU:ELABAPDB5738183&prefLang=en_US

This study was focused on prehnite–albite–calcite veins cutting metamorphic rocks (e. g., amphibolite and granulite) from the Lapland Granulite Belt of the Kandalaksha region in Kola Peninsula. The mineral veins cut the older granitoid veins and metamorphic rocks. The presence of a prehnite–albite –calcite association in host rocks and older granitoid veins confirms the low-grade metamorphism of the prehnite–albite facies, which proceeded at a low temperature and pressure. The analyses (PM, SEM-EDS, XRD, IR, CL, 13C, 18O) have confirmed that epidote, calcite, hematite and goethite are the youngest. The obtained δ13C values of calcite confirm the mantle origin of carbon, whereas δ18O results indicate that calcite was crystallized in water of meteoric origin, which precipitated in the cold climate. The prehnite–albite–calcite veins were formed by telethermal processes induced by a hot spot. Key words: Lapland Granulite Belt, Kandalaksha, prehnite–albite–calcite veins, SEM-EDS, XRD, IR, thermal analysis, CL, stable isotopes analysis.