Age, Sm-Nd systematics, and geochemistry of tonalite-trondhjemite-granodiorite gneisses of the northern part of the Baltic Shield

The formation of the crust in the northern part of the Baltic Shield in the Meso and Neoarchean occurred during intrusion of TTG juvenile melts to the ancient crust accompanied by crust recycling with participation of Meso and Paleoarchean material in the composition of the gray gneiss protolith. Th...

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Published inDoklady earth sciences Vol. 452; no. 1; pp. 930 - 935
Main Authors Vetrin, V. R., Rodionov, N. V., Serov, P. A.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.09.2013
Springer
Springer Nature B.V
Subjects
Continental crust
Cratons
Earth and Environmental Science
Earth science
Earth Sciences
Geochemistry
Geological time
Granite
Petrology
Recycling
Systematics
Quartz Diorite
DOKLADY Earth Science
Baltic Shield
206Pb
Metavolcanic Rock
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Summary:The formation of the crust in the northern part of the Baltic Shield in the Meso and Neoarchean occurred during intrusion of TTG juvenile melts to the ancient crust accompanied by crust recycling with participation of Meso and Paleoarchean material in the composition of the gray gneiss protolith. The isotope characteristics of the Paleoproterozoic granitoids were significantly controlled by the presence of Neoarchean material in melts with the content reaching 60-80% in granitoids of the second phase.Strengthening of recycling processes from ancient to younger granites was previously considered as a typical feature for the formation of the Earth's continental crust.
ISSN:1028-334X
1531-8354
DOI:10.1134/S1028334X13070271