Abstract
The paper distinguishes two complexes of high-grade meta-morphic rocks in the central portion of the Kola Peninsula (Baltic Shield): 1)the Vyezhe Tundra complex, mainly enderbites and basic granulites with subordinate plagiogneisses, iron formation, and metapyroxenites, and 2)the Kola series (mainly plagiogneisses with subordinate iron formation and basic granulites). Textural and paragenetic relationships point toward multi-cyclic metamorphism in the region. Metamorphic temperature conditions were estimated using a consistent system of geothermometers and geobarometers. Temperature maxima (670, 565 and 500° C) were ob-tained, which correspond to different stages of metamorphism in the re-gion. The results show that metamorphism in the two sequences occurred at similar temperatures; furthermore, no differences were found between unsheared and sheared rocks. The findings support the view that equilibra-tion between minerals during metamorphism is controlled by breakdown-crystallization reactions. The obtai...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
