THE GEOCHRONOLOGY OF QUARTZ DIORITES FROM ROMANOVO PLUTON VORONEZH CRYSTALLINE MASSIF
Here we present bulk chemistry and zircon U-Pb age of porphyraceous quartz diorite from Romanovo pluton in eastern part of Voronezh Crystalline Massif (VCM). The quartz diorite exhibit enrichment in light REE, fractionated heavy REE patterns, weak negative Eu anomalies relatively to chondrite; negative Sr, Nb, Ti anomalies relatively to primitive mantle. SIMS crystallization age of the quartz diorite yielded an 2062±15 Ma (207Pb/206Pb) and 2058±11 Ma (concordant U-Pb), which is coeval with intense post-collision magmatism in the eastern part of VCM. Our new data, together with recently published data, enable us to correlate the generation of the Romanovo pluton with intrusive rocks of Novaya Melovatka pluton.