Доклады Академии наукДоклады Академии наук0869-5652The Russian Academy of Sciences1621210.31857/S0869-5652488167-70Research ArticleSources of matter for Neoarchaean subalkaline magmatic rocks of the Keivy structure (Kola Peninsula)VetrinV. R.vetrin@geoksc.apatity.ruGeological Institute, Kola Science Centre of the Russian Academy of SciencesInstitute of Mineralogy, Geochemistry and Crystalochemistry of Rare Elements of the Russian Academy of Sciences23092019488167702109201921092019Copyright © 2019, Russian academy of sciences2019<p>The Neoarchaean subalkaline magmatism of Keivy structure is expressed in formation of the volcano-plutonic association of latite-monzonite-granite (ALMG). The quantity of the measured relation <sup>143</sup>Nd/<sup>144</sup>Nd in rocks is determined in 0.511061-0.511365, and values of model age are located in an interval from 3.14 to 3.21 billion years at Nd (2670) from 2.2 to -1.3. The initial relations <sup>176</sup>Hf/<sup>177</sup>Hf in zircon are in limits 0.280950-0.281069, and figurative points of composition form the field around a trend of the CHUR. According to the isotope and geochemical data for all rocks the basic composition of protholits is supposed. In quantity Hf(T) points of zircon are localized in the field of the development of the crust with <sup>176</sup>Lu/<sup>177</sup>Hf = 0.015 and 3.0-3.3 billion years age. It probably demonstrates the formation of initial melts mainly at the expense of matrix with a long time of stay in crust. The formation of ALMG magmas is assumed to appear due to the melting of metasomatically altered rocks of the lower crust during intrusion of basaltic melts initial for the rocks of the dike complex and the gabbro-labradorite massifs into the upper crust.</p>Neoarchaeon subalkaline rocksSm-Nd, Lu-Hf isotope systemspetrologyKola Peninsulaнеоархейские субщелочные породыизотопные Sm-Nd-, Lu-Hf-системыпетрологияКольский полуостров[Blichert-Toft J., Arndt N.T., Ludden J.N. // Lithos. 1996. V. 37. P. 97-111.][Ветрин В.Р., Родионов Н.В. // Петрология. 2009. Т. 17. № 6. С. 578-600.][Eby G.N. // Geology. 1992. V. 20. P. 641-644.][Griffin W.L., Pearson N.J., Belousova E., Jackson S.E., O’Reilly S.Y., van Achterberg E., Shee S.R. // Geochim. Cosmochim. Acta. 2000. V. 64. P. 133-147.][Литвиненко И.В., Анкудинов С.А., Платоненкова Л.Н., Сипарова Ю.А. Геология и глубинное строение восточной части Балтийского щита. Л.: Наука, 1968. С. 104-110.][Guitreau M., Blichert-Toft J., Martin H., Mojzsis S.J., Albarede F. // Earth. Planet. Sci. Lett. 2012. V. 337-338. P. 211-223.][Баянова Т.Б. Возраст реперных геологических комплексов Кольского региона и длительность процессов магматизма. СПб.: Наука, 2004. 174 с.][Vervoort J.D., Blichert-Toft J. // Geochim. et Cosmochim. Acta. 1999. V. 63. P. 533-556.][Ветрин В.Р., Белоусова Е.А., Кременецкий А.А. // Зап. РМО. 2017. Ч. CXLVI. № 3. С. 1-16.][Bonin B. // Lithos. V. 78. 2004. P. 1-24.][Patiño Douce A.E. // J. Petrol. 2005. V. 46. P. 275-290.][Watkins J.M., Clemens J.D., Treloar P.J. // Cont. Mineral and Petrol. 2007. V. 154.][Rapp R.P., Watson E.B. // J. Petrol. 1995. V. 36. P. 891-931.][Ferreira V.P., Sial A.N., Pimental M.M., Armstrong R., Guimarãs I.P., Filho A. F. da Silva, Lima M.M.C., da Silva T.R. // Lithos. 2015. V. 232. P. 150-161.][Белолипецкий А.П., Гаскельберг В.Г., Гаскельберг Л.А., Антонюк Е.С., Ильин Ю.И. Геология и геохимия метаморфических коплексов раннего докембрия Кольского полуострова. Л.: Наука, 1980. 240 с.]