Abstract
Morphology and compositions of minerals in metamorphized Early Proterozoic gabbroids of the Northern Ladoga area were studied with the purpose to identify criteria of their magmatic or metamorphic origin. These rock-forming minerals of the Kaalamsky complex are stable in the wide range of temperatures and pressure. To solve the problem, together with comparison with minerals from non-metamorphized rocks of the Potudan intrusion (Volga-Don orogen), there were used the data of petrographic study in as well as the data of mineral compositions and thermodynamic modeling. It was concluded that it is possible to distinguish groups of magmatic and metamorphic rock-forming minerals with help of morphogenetic, geochemical, and thermobarometric criteria, as well as criteria based on revealing the concordance between observed and modeled mineral compositions. Combined application of these criteria has allowed determining that rocks of Kaalamsky complex contain olivine, clinopyroxenes, amphiboles, plagioclases of magmatic origin, and also their metamorphic analogues.
Published Version
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 callMore From: Zapiski RMO (Proceedings of the Russian Mineralogical Society)
Disclaimer: 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.
