Isotopic-geochronological systems in metamorphic rocks: Pon’goma Island, Belomorian mobile belt

Autor: L. K. Levsky, I. M. Morozova, O. A. Levchenkov, V. S. Baikova, E S Bogomolov
Rok vydání: 2009
Předmět:
Zdroj: Geochemistry International. 47:215-230
ISSN: 1556-1968
0016-7029
DOI: 10.1134/s001670290903001x
Popis: Several isotopic methods (U-Pb, Sm-Nd, Rb-Sr, and K-Ar) were applied to different rock-forming and accessory minerals to decipher the chronology of events in a separate segment of the Belomorian mobile belt. Enderbites intruded supracrustal rocks at 2.73 Ga and granodiorites were emplaced at 2.41 Ga. Immediately afterwrads, a permeable schistosity zone was formed along the enderbite-granodiorite contact. Isotopic data indicate that this zone served as a pathway for heat and fluid. The retrograde stage of regional metamorphism and subsequent cooling continued from 1.89 Ga till ∼ 1.46 Ga.
Databáze: OpenAIRE
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