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Petrovsky M.N. and Vinogradov A.N.
Geological model of the late Archaean Porosozersky granitoid massif (the Kola Peninsula)
Abstract. A new geological model has been presented for the late Archaean Porosozersky granitoid massif in the Kola Peninsula. Four stages has been recognized in the pluton history: the main intrusive phase at 2733 Ma, when the long rock series gabbrodiorite - quartz moncodiorite - granodiorite - granite was produced as a result of inter-chamber differentiation; small bodies and veins of leucogranites were formed at the second stage; then dykes of lamprophyres intruded at 2680 Ma, and pegmatites completed the massif formation. The upper limit of the massif consolidation has been evaluated as 2674 Ma, when alkaline granites of the West Keivy complex were penetrated into the Porosozersky pluton. Contrary to the published early classifications, the Porosozersky pluton has been classified as a homologue of the orogenic tonalite-granodiorite formations of active continental margins.
Printed reference: Petrovsky M.N. and Vinogradov A.N. Geological model of the late Archaean Porosozersky granitoid massif (the Kola Peninsula) // Vestnik of MSTU. 2002. V. 5, No 1. P. -.
Electronic reference: Petrovsky M.N. and Vinogradov A.N. Geological model of the late Archaean Porosozersky granitoid massif (the Kola Peninsula) // Vestnik of MSTU. 2002. V. 5, No 1. P. -. URL: http://vestnik.mstu.edu.ru/v05_1_n11/articles/09_petr.zip.
