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

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 –...

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Bibliographic Details
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
Description
Summary: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.

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